tag:blogger.com,1999:blog-260398552024-03-21T17:53:06.950-07:00Rosebay BlogAmerican Rhododendron Society Massachusetts Chapter Rosebay BlogUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comBlogger491999tag:blogger.com,1999:blog-26039855.post-52265606845393761642011-12-08T01:06:00.000-08:002011-12-08T01:06:01.260-08:00Lake Keowee Population contains TriploidsDeciduous azalea hybrids selected from a native population near Lake Keowee, South Carolina have been determined to be triploids using flow cytometry by a team lead by Dr. Ranney.<br /><br />Summary of Ploidy Levels<br /><br />Triploid Deciduous azalea hybrids from Lake Keowee population<br /><br />Source: Lake Keowee population<br />Source: Clarence Towe<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-9270569103232040922011-12-07T01:57:00.000-08:002011-12-07T01:57:00.766-08:00Wine Spring Bald contains TriploidsTwo deciduous azalea hybrids selected from a native population on Wine Spring Bald, North Carolina have been determined to be triploids using flow cytometry by a team lead by Dr. Ranney.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 2 deciduous azalea hybrids from Wine Spring Bald population<br /><br />Source: Wine Spring Bald population<br />Source: Clarence Towe and Ron Miller<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-41993762364229855772011-12-06T03:26:00.000-08:002012-01-29T09:40:52.243-08:00Cherokee County Population contains TriploidsFour deciduous azalea hybrids selected from a native population in Cherokee County, Georgia have been determined to be triploids using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 4 deciduous azalea hybrids from Cherokee County population<br /><br />Source: Cherokee County population<br />Source: Charles Andrews<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-27638913079854535862011-12-05T05:33:00.000-08:002012-01-29T09:46:48.597-08:00Dawsonville Population contains TriploidsA deciduous azalea hybrid in a native population in Dawsonville, Georgia has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />This Dawsonville population contains <em>Rhododendron arborescens</em>, <em>Rhododendron canescens</em>, <em>Rhododendron periclymenoides</em>, and <em>Rhododendron calendulaceum</em>.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron arborescens</em><br />Diploid <em>Rhododendron canescens</em><br />Diploid <em>Rhododendron periclymenoides</em><br />Triploid 1 deciduous azalea hybrid in Dawsonville population<br />Tetraploid <em>Rhododendron calendulaceum</em><br /><br />Source: Dawsonville population<br />Source: Charles Andrews<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-60675041284130859272011-12-03T05:00:00.000-08:002012-01-29T09:46:48.608-08:00'July Jester' X 'My Mary' is a Triploid'July Jester' X 'My Mary', which is a John and Sally Perkins hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />In this case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron cumberlandense</em><br />Diploid <em>Rhododendron prunifolium</em><br />Triploid 'July Jester' X 'My Mary'<br />Tetraploid <em>Rhododendron austrinum</em><br />Tetraploid 'My Mary'<br /><br />Source: John and Sally Perkins<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-70928397490223634242011-12-01T17:04:00.000-08:002012-09-11T06:25:02.898-07:00"viscosum glaucum not" X 'Smoky Mountaineer' is a Triploid"viscosum glaucum not" X <em>Rhododendron calendulaceum</em> 'Smoky Mountaineer', which is a John and Sally Perkins hybrid, has been determined to be a triploid using flow cytometry by<br />
<br />
Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />
Plant Ecology and Evolution Group,<br />
Centre for Functional Ecology,<br />
Department of Life Sciences,<br />
Faculty of Science and Technology,<br />
University of Coimbra, Portugal.<br />
<br />
In this case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br />
<br />
Summary of Ploidy Levels<br />
<br />
Triploid "viscosum glaucum not" X <em>Rhododendron calendulaceum</em> 'Smoky Mountaineer'<br />
Tetraploid <em>Rhododendron calendulaceum</em><br />
Tetraploid <em>Rhododendron calendulaceum</em> 'Smoky Mountaineer'<br />
<br />
This seedling was grown on by<br />
<br />
Lindy Johnson <br />
<a href="http://www.appalachiannativeplants.com/">Appalachian Native Plants</a><br />
676 Waddell Road<br />
PO Box 736<br />
Mountain City, TN 37683<br />
<br />
Source: John and Sally Perkins<br />
Source: Appalachian Native Plants<br />
<br />
John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-40205846717747928752011-11-30T03:26:00.000-08:002012-09-11T06:25:54.246-07:00(pruniflorum X arborescens) X 'Smoky Mountaineer' is a Triploid(<em>Rhododendron pruniflorum</em> X <em>Rhododendron arborescens</em>) X <em>Rhododendron calendulaceum</em> 'Smoky Mountaineer', which is a John and Sally Perkins hybrid, has been determined to be a triploid using flow cytometry by<br />
<br />
Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />
Plant Ecology and Evolution Group,<br />
Centre for Functional Ecology,<br />
Department of Life Sciences,<br />
Faculty of Science and Technology,<br />
University of Coimbra, Portugal.<br />
<br />
<em>Rhododendron pruniflorum</em> and <em>Rhododendron arborescens</em> are diploid species. <em>Rhododendron calendulaceum</em> is a tetraploid species.<br />
<br />
In this case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br />
<br />
Summary of Ploidy Levels<br />
<br />
Diploid <em>Rhododendron pruniflorum</em>,<br />
Diploid <em>Rhododendron arborescens</em>,<br />
Triploid (<em>Rhododendron pruniflorum</em> X <em>Rhododendron arborescens</em>) X <em>Rhododendron calendulaceum</em> 'Smoky Mountaineer',<br />
Tetraploid <em>Rhododendron calendulaceum</em>,<br />
Tetraploid <em>Rhododendron calendulaceum</em> 'Smoky Mountaineer'<br />
<br />
This seedling was grown on by<br />
<br />
Lindy Johnson<br />
<a href="http://www.appalachiannativeplants.com/">Appalachian Native Plants</a><br />
676 Waddell Road<br />
PO Box 736<br />
Mountain City, TN 37683<br />
<br />
Source: John and Sally Perkins<br />
Source: Appalachian Native Plants<br />
<br />
John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-7442863431463390412011-11-28T04:46:00.000-08:002012-09-11T06:26:25.913-07:00prinophyllum X calendulaceum Engine Gap is a Triploid<em>Rhododendron prinophyllum</em> X <em>Rhododendron calendulaceum</em> "Engine Gap", which is a John and Sally Perkins hybrid, has been determined to be a triploid using flow cytometry by<br />
<br />
Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />
Plant Ecology and Evolution Group,<br />
Centre for Functional Ecology,<br />
Department of Life Sciences,<br />
Faculty of Science and Technology,<br />
University of Coimbra, Portugal.<br />
<br />
<em>Rhododendron prinophyllum</em> is diploid. <em>Rhododendron calendulaceum</em> is a tetraploid species.<br />
<br />
In this case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br />
<br />
Summary of Ploidy Levels<br />
<br />
Diploid <em>Rhododendron prinophyllum</em>,<br />
Triploid <em>Rhododendron prinophyllum</em> X <em>Rhododendron calendulaceum</em> "Engine Gap",<br />
Tetraploid <em>Rhododendron calendulaceum</em><br />
<br />
This seedling was grown on by<br />
<br />
Lindy Johnson<br />
<a href="http://www.appalachiannativeplants.com/">Appalachian Native Plants</a><br />
676 Waddell Road<br />
PO Box 736<br />
Mountain City, TN 37683<br />
<br />
Source: John and Sally Perkins<br />
Source: Appalachian Native Plants<br />
<br />
John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-74954540395535755672011-11-27T08:20:00.000-08:002012-09-11T06:30:07.446-07:00'Canobie Candy' X calendulaceum Engine Gap is a Triploid'Canobie Candy' X <em>Rhododendron calendulaceum</em> "Engine Gap", which is a John and Sally Perkins hybrid, has been determined to be a triploid using flow cytometry by<br />
<br />
Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />
Plant Ecology and Evolution Group,<br />
Centre for Functional Ecology,<br />
Department of Life Sciences,<br />
Faculty of Science and Technology,<br />
University of Coimbra, Portugal.<br />
<br />
'Canobie Candy' is diploid. <em>Rhododendron calendulaceum</em> is a tetraploid species.<br />
<br />
In this case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br />
<br />
Summary of Ploidy Levels<br />
<br />
Diploid 'Canobie Candy',<br />
Triploid 'Canobie Candy' X <em>Rhododendron calendulaceum</em> "Engine Gap",<br />
Tetraploid <em>Rhododendron calendulaceum</em><br />
<br />
This seedling was grown on by<br />
<br />
Lindy Johnson<br />
<a href="http://www.appalachiannativeplants.com/">Appalachian Native Plants</a><br />
676 Waddell Road<br />
PO Box 736<br />
Mountain City, TN 37683<br />
<br />
Source: John and Sally Perkins<br />
Source: Appalachian Native Plants<br />
<br />
John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-56249958505454670742011-11-26T16:49:00.000-08:002012-09-11T06:30:45.273-07:00molle x luteum is a Triploid<em>Rhododendron molle</em> X <em>Rhododendron luteum</em>, which is a John and Sally Perkins hybrid, has been determined to be a triploid using flow cytometry by<br />
<br />
Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />
Plant Ecology and Evolution Group,<br />
Centre for Functional Ecology,<br />
Department of Life Sciences,<br />
Faculty of Science and Technology,<br />
University of Coimbra, Portugal.<br />
<br />
<em>Rhododendron molle</em> is diploid species. <em>Rhododendron luteum</em> is a tetraploid species.<br />
<br />
In this case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br />
<br />
Summary of Ploidy Levels<br />
<br />
Diploid <em>Rhododendron molle</em>,<br />
Triploid <em>Rhododendron molle</em> X <em>Rhododendron luteum</em>,<br />
Tetraploid <em>Rhododendron luteum</em><br />
<br />
This seedling was grown on by<br />
<br />
Lindy Johnson<br />
<a href="http://www.appalachiannativeplants.com/">Appalachian Native Plants</a><br />
676 Waddell Road<br />
PO Box 736<br />
Mountain City, TN 37683<br />
<br />
Source: John and Sally Perkins<br />
Source: Appalachian Native Plants<br />
<br />
John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-48998305136017932192011-11-25T11:09:00.000-08:002012-01-29T09:46:48.687-08:00'Aamurusko' is a TriploidRhododendron 'Aamurusko', which is a Finnish Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Diploid 'Miniatum Floribundum',<br />Triploid 'Aida',<br />Triploid 'Aamurusko',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Triploid 'Phidias',<br />Triploid 'Pontica Album',<br />Triploid 'Van Houttei Flore Pleno',<br />Triploid 'Velasquez',<br />Triploid/Tetraploid 'Praxitèle',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid 'Bouquet de Flore',<br />Tetraploid 'Cardinal,<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Directeur Charles Baumann',<br />Tetraploid 'Durante Alle',<br />Tetraploid 'Electum',<br />Tetraploid 'Eugénie',<br />Tetraploid 'Fénelon',<br />Tetraploid 'Flameola Incarnata',<br />Tetraploid 'Héroine Plena,<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Hollandia',<br />Tetraploid 'Hora',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Igneum Novum',<br />Tetraploid 'Il Tasso',<br />Tetraploid 'Jenny Lind',<br />Tetraploid 'Juliana Nova',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Leibuir',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Marie Verschaffelt',<br />Tetraploid 'Minerva',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Perfecta',<br />Tetraploid 'Princesse d' Orange',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: Kristian Theqvist<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-1181547063209675772011-10-27T04:02:00.000-07:002012-01-29T09:46:48.924-08:00'Spicy Lights' is a TriploidRhododendron 'Spicy Lights', which is in the Northern Lights group from the University of Minnesota documented as <em>Rhododendron prinophyllum</em> as the seed parent, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'Spicy Lights' appears to be sterile.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron canadense</em>,<br />Diploid <em>Rhododendron molle</em>,<br />Diploid <em>Rhododendron prinophyllum</em>,<br />Diploid 'Lilac Lights',<br />Diploid 'Orchid Lights',<br />Diploid 'Rosy Lights',<br />Triploid 'Spicy Lights',<br />Triploid 'White Lights',<br />Tetraploid <em>Rhododendron atlanticum</em>,<br />Tetraploid <em>Rhododendron calendulaceum</em>,<br />Tetraploid <em>Rhododendron luteum</em>,<br />Tetraploid 'Apricot Surprise',<br />Tetraploid 'Candy Lights',<br />Tetraploid 'Golden Lights',<br />Tetraploid 'Lemon Lights',<br />Tetraploid 'Mandarin Lights',<br />Tetraploid 'Northern Hi-Lights',<br />Tetraploid 'Tri-Lights'<br /><br />Source: Kristian Theqvist<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-42963643599072608522011-10-25T10:36:00.000-07:002012-01-29T09:46:48.936-08:00'White Lights' is a TriploidRhododendron 'White Lights', which is in the Northern Lights group from the University of Minnesota documented as <em>Rhododendron prinophyllum</em> X white Exbury, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'White Lights' appears to be sterile.<br /><br />Most Exbury deciduous azaleas are tetraploids.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron canadense</em>,<br />Diploid <em>Rhododendron molle</em>,<br />Diploid <em>Rhododendron prinophyllum</em>,<br />Diploid 'Lilac Lights',<br />Diploid 'Orchid Lights',<br />Diploid 'Rosy Lights',<br />Triploid 'Spicy Lights',<br />Triploid 'White Lights',<br />Tetraploid <em>Rhododendron atlanticum</em>,<br />Tetraploid <em>Rhododendron calendulaceum</em>,<br />Tetraploid <em>Rhododendron luteum</em>,<br />Tetraploid 'Apricot Surprise',<br />Tetraploid 'Candy Lights',<br />Tetraploid 'Golden Lights',<br />Tetraploid 'Lemon Lights',<br />Tetraploid 'Mandarin Lights',<br />Tetraploid 'Northern Hi-Lights',<br />Tetraploid 'Tri-Lights'<br /><br />Source: Kristian Theqvist<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-3135926168351532412011-09-24T01:46:00.000-07:002012-01-29T09:46:49.256-08:00"Gladywense" is a TriploidRhododendron "Gladywense" has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Triploid Rhododendron "Gladywense"<br /><br />Source: Arnold Arboretum Accession Number: 979-67-A<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-35258769826809884682011-09-23T01:39:00.000-07:002012-01-29T09:46:49.267-08:00Rhododendron "calendulaceum not" is a TriploidRhododendron "calendulaceum not", which appears to be a hybrid between <em>Rhododendron flammeum</em> and <em>Rhododendron calendualceum</em>, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron flammeum</em>,<br />Triploid Rhododendron "calendulaceum not",<br />Tetraploid <em>Rhododendron calendualceum</em><br /><br />Source: Arnold Arboretum Accession Number: 109-2007-Y<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-25545924166924806502011-09-22T01:23:00.000-07:002012-01-29T09:46:49.279-08:00'Unique' is a Triploid?Rhododendron 'Unique', which is a Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'Unique' was determined to be a tetraploid using flow cytometry by <a href="http://lib.ugent.be/fulltxt/RUG01/000/788/476/RUG01-000788476_2010_0001_AC.pdf">Tom Eeckhaut</a>.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Unique'<br /><br />Source: Arnold Arboretum Accession Number: 72-57-B<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-82893447271531693662011-09-21T01:17:00.000-07:002012-01-29T09:46:49.292-08:00Rhododendron occidentale hybrid is a TriploidA <em>Rhododendron occidentale</em> hybrid has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron occidentale</em>,<br />Triploid <em>Rhododendron occidentale</em> hybrid<br /><br />Source: George Hibben<br /> <br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-54352887657062452392011-09-20T01:48:00.000-07:002012-01-29T09:46:49.303-08:00Audra State Park contains TriploidsTwo deciduous azalea hybrids in Audra State Park, West Virginia have been determined to be triploids using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Audra State Park in West Virginia contains <em>Rhododendron arborescens</em>, <em>Rhododendron maximum</em>, <em>Rhododendron periclymenoides</em>, maybe <br /><em>Rhododendron prinophyllum</em>, and <em>Rhododendron calendulaceum</em>.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron arborescens</em>,<br />Diploid <em>Rhododendron maximum</em>,<br />Diploid <em>Rhododendron periclymenoides</em>,<br />Diploid <em>Rhododendron prinophyllum</em>,<br />Triploid 2 deciduous azalea hybrids in Audra State Park,<br />Tetraploid <em>Rhododendron calendulaceum</em><br /><br />Source: Audra State Park, West Virginia<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-44746962152664090052011-09-05T01:24:00.000-07:002012-01-29T09:46:49.477-08:00Rhododendron arborescens X Rhododendron calendulaceum is a TriploidOne seedling of <em>Rhododendron arborescens X Rhododendron calendulaceum</em> has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br /><em>Rhododendron arborescens</em> is diploid species. <em>Rhododendron calendulaceum</em> is a tetraploid species.<br /><br />In the case of these triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron arborescens</em>,<br />Triploid 5 seedlings from <em>Rhododendron occidentale SM189 X Rhododendron calendulaceum 'Colossus'</em>,<br />Tetraploid <em>Rhododendron calendulaceum</em><br /><br />Source: Bruce Clyburn<br /> <br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-44543495725071481372011-09-04T01:16:00.000-07:002012-01-29T09:46:49.488-08:00occidentale SM189 X calendulaceum 'Colossus' is a TriploidFive seedlings of <em>Rhododendron occidentale SM189 X Rhododendron calendulaceum 'Colossus'</em> have been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br /><em>Rhododendron occidentale</em> is diploid species. <em>Rhododendron calendulaceum</em> is a tetraploid species.<br /><br />In the case of these 5 triploids (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron occidentale</em>,<br />Triploid 5 seedlings from <em>Rhododendron occidentale SM189 X Rhododendron calendulaceum 'Colossus'</em>,<br />Tetraploid <em>Rhododendron calendulaceum</em><br /><br />Source: Bruce Clyburn<br /> <br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-16083340977755168682011-08-03T01:02:00.000-07:002012-01-29T09:46:49.918-08:00'Praxitèle' is an Aneuploid?Rhododendron 'Praxitèle', which is a 1888 L. de Smet Ghent hybrid, has been determined to be a aneuploid falling between the triploid and tetraploid ranges using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Diploid 'Miniatum Floribundum',<br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Triploid 'Phidias',<br />Triploid 'Pontica Album',<br />Triploid 'Van Houttei Flore Pleno',<br />Triploid 'Velasquez',<br />Triploid/Tetraploid 'Praxitèle',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid 'Bouquet de Flore',<br />Tetraploid 'Cardinal,<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Directeur Charles Baumann',<br />Tetraploid 'Durante Alle',<br />Tetraploid 'Electum',<br />Tetraploid 'Eugénie',<br />Tetraploid 'Fénelon',<br />Tetraploid 'Flameola Incarnata',<br />Tetraploid 'Héroine Plena,<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Hollandia',<br />Tetraploid 'Hora',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Igneum Novum',<br />Tetraploid 'Il Tasso',<br />Tetraploid 'Jenny Lind',<br />Tetraploid 'Juliana Nova',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Leibuir',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Marie Verschaffelt',<br />Tetraploid 'Minerva',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Perfecta',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-77558274365009734262011-07-17T01:19:00.000-07:002012-01-29T09:46:50.117-08:00'Velasquez' is a TriploidRhododendron 'Velasquez', which is a 1888 L. de Smet Rustica hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rustica hybrids are a mixture of double flowered Ghents hybrids and the Mollis hybrids. The Mollis hybrids contain the diploid species <em>Rhododendron molle</em>. To date all Ghent hybrids (except one)including the doubles have tested as triploid or tetraploid.<br /><br />C. Vuylsteke, who was the first person to exhibit the Rustica, purchased them from L. de Smet. <br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron molle</em>,<br />Diploid 'Miniatum Floribundum',<br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Triploid 'Phidias',<br />Triploid 'Pontica Album',<br />Triploid 'Van Houttei Flore Pleno',<br />Triploid 'Velasquez',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid 'Bouquet de Flore',<br />Tetraploid 'Cardinal,<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Directeur Charles Baumann',<br />Tetraploid 'Durante Alle',<br />Tetraploid 'Electum',<br />Tetraploid 'Eugénie',<br />Tetraploid 'Fénelon',<br />Tetraploid 'Flameola Incarnata',<br />Tetraploid 'Héroine Plena,<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-48595960790227266092011-07-13T01:08:00.000-07:002012-01-29T09:46:50.161-08:00'Van Houttei Flore Pleno' is a TriploidRhododendron 'Van Houttei Flore Pleno', which is 1858 L. B. Van Houtte Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'Van Houttei Flore Pleno' was also determined to be a triploid using flow cytometry by <a href="http://lib.ugent.be/fulltxt/RUG01/000/788/476/RUG01-000788476_2010_0001_AC.pdf">Tom Eeckhaut</a>.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Triploid 'Phidias',<br />Triploid 'Pontica Album',<br />Triploid 'Van Houttei Flore Pleno',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid' Bouquet de Flore',<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-16338235355991801102011-07-12T01:56:00.000-07:002012-01-29T09:46:50.172-08:00'Pontica Album' is a TriploidRhododendron 'Pontica Album', which is most likely the white form of <em>Rhododendron luteum</em> documented by C. Loddiges in 1826, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Diploid 'Miniatum Floribundum',<br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Triploid 'Phidias',<br />Triploid 'Pontica Album',<br />Triploid 'Van Houttei Flore Pleno',<br />Triploid 'Velasquez',<br />Tetraploid <em>Rhododendron luteum</em>,<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid 'Bouquet de Flore',<br />Tetraploid 'Cardinal,<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Directeur Charles Baumann',<br />Tetraploid 'Durante Alle',<br />Tetraploid 'Electum',<br />Tetraploid 'Eugénie',<br />Tetraploid 'Fénelon',<br />Tetraploid 'Flameola Incarnata',<br />Tetraploid 'Héroine Plena,<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-62277066949569836062011-07-11T01:15:00.000-07:002012-01-29T09:46:50.183-08:00'Phidias' is a TriploidRhododendron 'Phidias', which is a 1888 L. de Smet Rustica hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rustica hybrids are a mixture of double flowered Ghents hybrids and the Mollis hybrids. The Mollis hybrids contain the diploid species <em>Rhododendron molle</em>. To date all Ghent hybrids (except one)including the doubles have tested as triploid or tetraploid.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron molle</em>,<br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Triploid 'Phidias',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid' Bouquet de Flore',<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-65344292630626331112011-07-10T01:52:00.000-07:002012-01-29T09:46:50.194-08:00'Phebe' is a TriploidRhododendron 'Phebe', which is a 1888 L. de Smet Rustica hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rustica hybrids are a mixture of double flowered Ghents hybrids and the Mollis hybrids. The Mollis hybrids contain the diploid species <em>Rhododendron molle</em>. To date all Ghent hybrids (except one)including the doubles have tested as triploid or tetraploid.<br /><br />Rhododendron 'Phebe' was also determined to be a triploid using flow cytometry by <a href="http://lib.ugent.be/fulltxt/RUG01/000/788/476/RUG01-000788476_2010_0001_AC.pdf">Tom Eeckhaut</a>.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron molle</em>,<br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid' Bouquet de Flore',<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-7502685389375163772011-07-09T01:40:00.000-07:002012-01-29T09:46:50.205-08:00'Il Tasso' is a TriploidRhododendron 'Freya', which is a 1888 L. de Smet Rustica hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rustica hybrids are a mixture of double flowered Ghents hybrids and the Mollis hybrids. The Mollis hybrids contain the diploid species <em>Rhododendron molle</em>. To date all Ghent hybrids (except one)including the doubles have tested as triploid or tetraploid.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron molle</em>,<br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Croceum Tricolor',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Il Tasso',<br />Triploid 'Josephine Klinger',<br />Triploid 'Phebe',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid' Bouquet de Flore',<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-19503654227095822022011-07-08T01:32:00.000-07:002012-01-29T09:46:50.216-08:00'Freya' is a TriploidRhododendron 'Freya', which is a 1888 L. de Smet-Duvivier Rustica hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Freya',<br />Triploid 'Gloria Mundi',<br />Triploid 'Josephine Klinger',<br />Triploid 'Croceum Tricolor',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid' Bouquet de Flore',<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-46421985881212630452011-07-07T01:53:00.000-07:002012-01-29T09:46:50.228-08:00'Croceum Tricolor' is a TriploidRhododendron 'Croceum Tricolor', which is a 1851 Jacob-Makoy Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Gloria Mundi',<br />Triploid 'Josephine Klinger',<br />Triploid 'Croceum Tricolor',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid' Bouquet de Flore',<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Corneille',<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-72411274773844749832011-06-21T01:02:00.000-07:002012-01-29T09:46:50.430-08:00'Aida' is a TriploidRhododendron 'Aida', which is a 1888 L. de Smet Rustica hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca Oliveira, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rustica hybrids are a mixture of double flowered Ghents hybrids and the Mollis hybrids. The Mollis hybrids contain the diploid species <em>Rhododendron molle</em>. To date all Ghent hybrids (except one)including the doubles have tested as triploid or tetraploid.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron molle</em>,<br />Triploid 'Aida',<br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Gloria Mundi',<br />Triploid 'Josephine Klinger',<br />Tetraploid 'Admiraal De Ruyter',<br />Tetraploid 'Altaclerensis',<br />Tetraploid 'Ariel',<br />Tetraploid 'Beaté Céleste',<br />Tetraploid 'Bijou des Amateurs',<br />Tetraploid' Bouquet de Flore',<br />Tetraploid 'Comte de Flandre',<br />Tetraploid 'Heureuse Surprise',<br />Tetraploid 'Ignacea',<br />Tetraploid 'Julius Caesar',<br />Tetraploid 'Lelia',<br />Tetraploid 'Madame Gustave Guillemot',<br />Tetraploid 'Nancy Waterer',<br />Tetraploid 'Oscar I',<br />Tetraploid 'Raphael de Smet'<br /><br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a> <br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-32555477341838981792011-06-15T01:18:00.001-07:002012-01-29T09:46:50.512-08:00'Harrison's Red' is a TriploidRhododendron 'Harrison's Red', which is a documented as <em>Rhododendron austrinum</em>, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca Oliveira, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />The ploidy results suggests that 'Harrison's Red' is a <em>Rhododendron austrinum</em> hybrid rather than a color form of the straight species.<br /><br />Rhododendron Species Foundation lists 'Harrison's Red' under <em>Rhododendron austrinum</em> as follows:<br /><br />1993/002 'Harrison's Red' A floriferous and easily grown deciduous azalea with slightly fragrant flowers in mid-spring. The flower color on this selection is listed as "rosy-red" but I have not recorded it in flower. Very heat tolerant, sun or shade. (-10\R1\6)<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Evening Sun',<br />Triploid 'Harrison's Red',<br />Tetraploid <em>Rhododendron austrinum</em><br /><br />Source: Woodlanders Nursery<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-9967190101518430752011-06-07T01:42:00.000-07:002012-01-29T09:46:50.604-08:00'Evening Sun' is a TriploidRhododendron 'Evening Sun', which is a Earl Sommerville introduction documented as <em>Rhododendron austrinum</em> or <em>austrinum</em> hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca Oliveira, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Evening Sun',<br />Tetraploid <em>Rhododendron austrinum</em>, <br />Tetraploid 'Earl's Gold',<br />Tetraploid 'Sommerville Sunrise'<br /><br />Source: RareFind Nursery<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-70227711111950733782011-03-26T06:47:00.000-07:002012-01-29T09:46:51.479-08:00"Parks Pink" is a TriploidRhododendron "Parks Pink", which is a Joe Parks hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron "Parks Pink", similar to many triploid deciduous azaleas, appears to be both seed and pollen sterile.<br /><br />Summary of Ploidy Levels<br /><br />Triploid "Parks Pink"<br /><br />Source: John and Sally Perkins<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-82459031246995100772011-03-25T01:34:00.000-07:002012-01-29T09:46:51.490-08:00'Bronze Unique' is a Triploid?Rhododendron 'Bronze Unique', which is a 1849 Louis Verschaffelt Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />The Ghents are documented as having been produced from crossing diploid and tetraploid deciduous azalea species. This result appears to support that documentation.<br /><br />The plant of Rhododendron 'Bronze Unique' tested does not agree in some characteristics with earlier descriptions of this cultivar. Moreover this plant tested at the high end of the range for triploids.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Gloria Mundi',<br />Triploid 'Josephine Klinger'<br /><br />Source: Arnold Arboretum Accession Number: 19403<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-84731520331720351862011-03-24T04:12:00.000-07:002012-01-29T09:46:51.501-08:00'Graf von Meran' is a Triploid?A plant at the Arnold Arboretum labeled Rhododendron 'Graf von Meran', which is a 1858 J. Rinz Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'Graf von Meran' was determined to be a tetraploid using flow cytometry by <a href="http://lib.ugent.be/fulltxt/RUG01/000/788/476/RUG01-000788476_2010_0001_AC.pdf">Tom Eeckhaut</a>.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Gloria Mundi',<br />Triploid 'Graf von Meran' at Arnold Arboretum,<br />Triploid 'Josephine Klinger',<br />Tetraploid 'Graf von Meran' by Eeckhaut<br /><br />Source: Arnold Arboretum Accession Number: 7101<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-33310399915802103402011-03-23T03:32:00.000-07:002012-01-29T09:46:51.513-08:00(cumberlandense X arborescens) X calendualceum is a TriploidTwo seedlings of <em>[(Rhododendron cumberlandense X Rhododendron arborescens) X Rhododendron calendulaceum]</em> have been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br /><em>Rhododendron cumberlandense</em> and <em>Rhododendron arborescens</em> are diploid species. <em>Rhododendron calendulaceum</em> is a tetraploid species.<br /><br />In the case of these 2 triploids (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron cumberlandense</em>,<br />Diploid <em>Rhododendron arborescens</em>,<br />Triploid 2 seedlings from <em>[(Rhododendron cumberlandense X Rhododendron arborescens) X Rhododendron calendulaceum]</em>,<br />Tetraploid <em>Rhododendron calendulaceum</em><br /><br />Source: Joe Bruso<br /> <br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-33269388872290989702011-03-22T03:51:00.000-07:002012-09-11T06:31:33.265-07:00(cumberlandense X viscosum) X 'Apricot Surprise' is a TriploidTwo seedlings of <em>[(Rhododendron cumberlandense X Rhododendron viscosum)</em> X 'Apricot Surprise'], which is a John and Sally Perkins hybrid, have been determined to be a triploid using flow cytometry by <br />
<br />
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro <br />
Plant Ecology and Evolution Group, <br />
Centre for Functional Ecology, <br />
Department of Life Sciences, <br />
Faculty of Science and Technology, <br />
University of Coimbra, Portugal. <br />
<br />
<em>Rhododendron cumberlandense</em> and <em>Rhododendron viscosum</em> are diploid species. 'Apricot Surprise' is a tetraploid. <br />
<br />
In the case of these 2 triploids (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes). <br />
<br />
Summary of Ploidy Levels <br />
<br />
Diploid <em>Rhododendron cumberlandense</em>, <br />
Diploid <em>Rhododendron viscosum</em>, <br />
Triploid 2 seedlings from <em>[(Rhododendron cumberlandense X Rhododendron viscosum)</em> X 'Apricot Surprise' ], <br />
Tetraploid 'Apricot Surprise' <br />
<br />
Seedlings from this same cross were sold at the November 14, 2010 Founders Day Meeting of the ARS Massachusetts Chapter and at the November 20, 2010 Banquet of the New England Rock Garden Society. <br />
<br />
These seedlings were grown on by <br />
<br />
Lindy Johnson <br />
<a href="http://www.appalachiannativeplants.com/">Appalachian Native Plants</a> <br />
676 Waddell Road <br />
PO Box 736 <br />
Mountain City, TN 37683 <br />
<br />
Source: John and Sally Perkins <br />
Source: Appalachian Native Plants <br />
<br />
John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-45287541198058697292011-03-21T07:27:00.000-07:002012-01-29T09:46:51.539-08:00'Deep Rose' is a TriploidRhododendron 'Deep Rose', which is an Ed Mezitt Ghent hybrid documented as <em>Rhododendron arborescens</em> (possibly <em>cumberlandense</em>) X red Ghent, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />To date all Ghents have tested as triploid or tetraploid.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron arborescens</em>,<br />Diploid <em>Rhododendron cumberlandense</em>,<br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Gloria Mundi',<br />Triploid 'Graf von Meran',<br />Triploid 'Josephine Klinger'<br /><br />Source: George Hibben<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-28389382261002233882011-03-19T01:19:00.000-07:002012-01-29T09:46:51.561-08:00cumberlandense X 'Marydel' is a Triploid<img src="http://1.bp.blogspot.com/-TxXiMZiok78/TYP9SHbrBLI/AAAAAAAADxE/5JXmRg7FF2o/s1600/Slide7.JPG"/><br /><br />One seedling of <em>Rhododendron cumberlandense</em> orange X <em>Rhododendron atlanticum 'Marydel'</em>, which is a Sally and John Perkins hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />This seedling of <em>Rhododendron cumberlandense</em> orange X <em>Rhododendron atlanticum 'Marydel'</em> looks remarkably similar to the tetraploid pollen parent 'Marydel' differing primarily in having a small yellow blotch.<br /><br />To date this seedling has proven sterile as both a seed parent and a pollen parent.<br /><br />In the case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron cumberlandense</em>,<br />Triploid One seedling of <em>Rhododendron cumberlandense</em> X <em>Rhododendron atlanticum 'Marydel'</em>, <br />Tetraploid <em>Rhododendron atlanticum</em>,<br />Tetraploid <em>Rhododendron atlanticum</em> 'Marydel'<br /><br />Source: East Fork Nursery<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-87857453996590477322011-03-17T04:42:00.000-07:002012-01-29T09:46:51.597-08:00'Daviesii' is a Fertile TriploidRhododendron 'Daviesii', which is a 1840 Isaac Davies hybrid often documented as <em>Rhododendron viscosum</em> X <em>Rhododendron molle</em>, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'Daviesii' is documented to be the seed parent of 'Moorgold', which is a Schmalscheidt hybrid. John Migas has indicated that 'Daviesii' sets viable seed.<br /><br />Davies' notes indicate that 'Daviesii' was produced using "A. sinesis crossed a hardy white azaleas."<br /><br />Rhododendron 'Viscosepalum', which is often documented to be <em>Rhododendron molle</em> X <em>Rhododendron viscosum</em>, has been determined to be a tetraploid. <br /><br />The flow cytometry ploidy results for 'Daviesii' and 'Viscosepalum' indicate the pollen parent may have been the tetraploid <em>Rhododendron atlanticum</em> rather than the diploid <em>Rhododendron viscosum</em>. The normal bloom times for <em>Rhododendron molle</em> and <em>Rhododendron atlanticum</em> overlay whereas this is not the case for <em>Rhododendron molle</em> and <em>Rhododendron viscosum</em>. <em>Rhododendron viscosum</em> and <em>Rhododendron atlanticum</em> are known to colocate in the wild.<br /><br />'Viscosepalum' and 'Daviesii' are sometimes confused in commercial settings.<br /><br />Rhododendron 'Daviesii' was also determined to be a triploid using flow cytometry by <a href="http://lib.ugent.be/fulltxt/RUG01/000/788/476/RUG01-000788476_2010_0001_AC.pdf">Tom Eeckhaut</a>.<br /><br />Plants labeled Rhododendron 'Daviesii' have also tested as tetraploid and pentaploid.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron molle</em>,<br />Diploid <em>Rhododendron viscosum</em>,<br />Triploid 'Graf von Meran',<br />Triploid 'Daviesii',<br />Triploid 'Gloria Mundi',<br />Triploid 'Josephine Klinger',<br />Tetraploid <em>Rhododendron atlanticum</em>,<br />Tetraploid 'Viscosepalum'<br /><br />Source: Greer Gardens<br />Source: Whitney Nursery<br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a><br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-89222074200597401622011-03-16T04:30:00.000-07:002012-01-29T09:46:51.610-08:00'Gloria Mundi' is a Fertile TriploidRhododendron 'Gloria Mundi', which is a 1835 J. Verleeuwen Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'Vlasta' is documented as a cross of 'Gloria Mundi' x 'Anthony Koster'.<br /><br />Rhododendron 'Gloria Mundi' has set seedpods at the Arnold Arboretum when pollinated with known tetraploids.<br /><br />The Ghents are documented as having been produced from crossing diploid and tetraploid deciduous azalea species. This result appears to support that documentation.<br /><br />Rhododendron 'Gloria Mundi' was also determined to be a triploid using flow cytometry by <a href="http://lib.ugent.be/fulltxt/RUG01/000/788/476/RUG01-000788476_2010_0001_AC.pdf">Tom Eeckhaut</a>.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Gloria Mundi',<br />Triploid 'Josephine Klinger'<br /><br />Source: Arnold Arboretum Accession Number: 10125<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-88560616587117170942011-03-15T03:41:00.000-07:002012-01-29T09:46:51.624-08:00'Norma' is a TriploidRhododendron 'Norma', which is a 1888 L. de Smet Rustica hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rustica hybrids are a mixture of double flowered Ghents hybrids and the Mollis hybrids. The Mollis hybrids contain the diploid species <em>Rhododendron molle</em>. To date all Ghent hybrids (except one)including the doubles have tested as triploid or tetraploid.<br /><br />Rhododendron 'Norma' was also determined to be a triploid using flow cytometry by Tom Eeckhaut.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron molle</em>,<br />Triploid 'Norma'<br /><br />Source: Arnold Arboretum Accession Number: 142-44<br />Source: <a href="http://www.azaleatuin.be">Azaleatuin</a><br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-81900974565192509962011-03-05T04:32:00.000-08:002012-01-29T09:46:51.745-08:00Rhododendron prunifolium X Rhododendron austrinum is a TriploidOne seedling of <em>Rhododendron prunifolium X Rhododendron austrinum</em>, which is a John Thornton hybrid, has been determined to be a triploid using flow cytometry by
<br />
<br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
<br />Plant Ecology and Evolution Group,
<br />Centre for Functional Ecology,
<br />Department of Life Sciences,
<br />Faculty of Science and Technology,
<br />University of Coimbra, Portugal.
<br />
<br /><em>Rhododendron prunifolium</em> is a diploid species. <em>Rhododendron austrinum</em> is a tetraploid species.
<br />
<br />In this case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).
<br />
<br />Summary of Ploidy Levels
<br />
<br />Diploid <em>Rhododendron prunifolium</em>,
<br />Triploid 1 seedling from <em>Rhododendron prunifolium X Rhododendron austrinum</em>,
<br />Tetraploid <em>Rhododendron austrinum</em>
<br />
<br />Source: John Thornton
<br />
<br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-81238599758092767932011-03-04T03:31:00.000-08:002012-01-29T09:46:51.757-08:00Rhododendron viscosum X Rhododendron austrinum is a TriploidOne seedling of <em>Rhododendron viscosum syn. serrulatum X Rhododendron austrinum</em>, which is a John Thornton hybrid, has been determined to be a triploid using flow cytometry by
<br />
<br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
<br />Plant Ecology and Evolution Group,
<br />Centre for Functional Ecology,
<br />Department of Life Sciences,
<br />Faculty of Science and Technology,
<br />University of Coimbra, Portugal.
<br />
<br /><em>Rhododendron viscosum</em> is a diploid species. <em>Rhododendron austrinum</em> is a tetraploid species.
<br />
<br />In the case of this triploid (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes).
<br />
<br /><em>Rhododendron viscosum syn. serrulatum</em> is sometimes documented as <em>Rhododendron serrulatum</em> but is now considered merely a southern form of <em>Rhododendron viscosum</em>
<br />
<br />Summary of Ploidy Levels
<br />
<br />Diploid <em>Rhododendron viscosum</em>,
<br />Triploid 1 seedling from <em>Rhododendron viscosum syn. serrulatum X Rhododendron austrinum</em>,
<br />Tetraploid <em>Rhododendron austrinum</em>
<br />
<br />Source: John Thornton
<br />
<br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-22177955939176954072011-03-01T04:27:00.000-08:002012-01-29T09:46:51.803-08:00'Mel's Rose' is a TriploidRhododendron 'Mel's Rose', which is sometimes listed as a <em>Rhododendron calendulaceum</em> but is possibly a man made <em>Rhododendron austrinum</em> hybrid, has been determined to be a triploid using flow cytometry by
<br />
<br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
<br />Plant Ecology and Evolution Group,
<br />Centre for Functional Ecology,
<br />Department of Life Sciences,
<br />Faculty of Science and Technology,
<br />University of Coimbra, Portugal.
<br />
<br />Summary of Ploidy Levels
<br />
<br />Triploid 'Mel's Rose',
<br />Tetraploid <em>Rhododendron austrinum</em>,
<br />Tetraploid <em>Rhododendron calendulaceum</em>
<br />
<br />Source: John Thornton
<br />
<br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-17112541312151773192010-11-15T10:20:00.000-08:002012-09-11T06:32:13.996-07:00[(cumberlandense X viscosum) X colemanii] is a TriploidTwo seedlings of <em>[(Rhododendron cumberlandense X R. viscosum) X R. colemanii]</em>, which is a John and Sally Perkins hybrid, have been determined to be a triploid using flow cytometry by <br />
<br />
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro <br />
Plant Ecology and Evolution Group, <br />
Centre for Functional Ecology, <br />
Department of Life Sciences, <br />
Faculty of Science and Technology, <br />
University of Coimbra, Portugal. <br />
<br />
<em>Rhododendron cumberlandense</em> and <em>Rhododendron viscosum</em> are diploid species. <em>Rhododendron colemanii</em> is a tetraploid species. <br />
<br />
In this case of these 2 triploids (39 chromosomes), a diploid crossed with a tetraploid produced a triploid indicating normal meiosis occurred where the diploid contributed a 1x gamete (13 chromosomes) and the tetraploid contributed a 2x gamete (26 chromosomes). <br />
<br />
Summary of Ploidy Levels <br />
<br />
Diploid <em>Rhododendron cumberlandense</em>, <br />
Diploid <em>Rhododendron viscosum</em>, <br />
Triploid 2 seedlings from <em>[(Rhododendron cumberlandense X R. viscosum) X R. colemanii]</em>, <br />
Tetraploid <em>Rhododendron colemanii</em> <br />
<br />
Seedlings from this same cross were sold at the November 14, 2010 Founders Day Meeting of the ARS Massachusetts Chapter and at the November 20, 2010 Banquet of the New England Rock Garden Society. <br />
<br />
These seedlings were grown on by <br />
<br />
Lindy Johnson <br />
<a href="http://www.appalachiannativeplants.com/">Appalachian Native Plants</a> <br />
676 Waddell Road <br />
PO Box 736 <br />
Mountain City, TN 37683 <br />
<br />
Source: John and Sally Perkins <br />
Source: Appalachian Native Plants <br />
<br />
John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-64232672411037525642010-11-08T06:09:00.000-08:002012-01-29T09:46:53.224-08:00'Hank's Folly' is a TriploidRhododendron 'Hank's Folly', which is a Hank Schannen hybrid documented as 'Chionoides' x 'Gibraltar', has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />'Hank's Folly' is a cross of an elepidote with a deciduous azalea.<br /><br />'Gibraltar' has been determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Hank's Folly',<br />Tetraploid 'Gibraltar'<br /><br />Source: Rarefind Nursery<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-65198642776990625982010-10-23T13:38:00.000-07:002012-01-29T09:46:53.394-08:00'Josephine Klinger' is a TriploidRhododendron 'Josephine Klinger', which is a 1869 J. Baumann Ghent hybrid, has been determined to be a triploid using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences,<br />Faculty of Science and Technology,<br />University of Coimbra, Portugal.<br /><br />Rhododendron 'Josephine Klinger' appears to be sterile as both a seed and pollen parent indicating that it may represent a first generation cross of a diploid and tetraploid deciduous azalea species. The Ghents are documented as having been produced from crossing diploid and tetraploid deciduous azalea species. This result appears to support that documentation.<br /><br />Summary of Ploidy Levels<br /><br />Triploid 'Bronze Unique',<br />Triploid 'Daviesii',<br />Triploid 'Deep Rose',<br />Triploid 'Gloria Mundi',<br />Triploid 'Josephine Klinger'<br /><br />Source: John and Sally Perkins<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.comtag:blogger.com,1999:blog-26039855.post-563524290177605342010-09-27T13:24:00.000-07:002012-01-29T09:46:53.673-08:00Audra State Park: A Ploidy HavenAudra State Park, located in northwestern West Virginia, has been determined to contain diploid, triploid, and tetraploid deciduous azaleas using flow cytometry by<br /><br />Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro<br />Plant Ecology and Evolution Group,<br />Centre for Functional Ecology,<br />Department of Life Sciences, <br />Faculty of Science and Technology, <br />University of Coimbra, Portugal.<br /><br />Audra State Park contains the diploid species <em>periclymenoides</em> and <em>arborescens</em> and the tetraploid species <em>calendulaceum</em>. The three species have interacted to create nature hybrids some of which are triploids.<br /><br />There are indications that <em>Rhododendron prinophyllum</em> may also be present. <em>Rhododendron maximum</em> and <em>Kalmia latifolia</em> are present.<br /><br />Summary of Ploidy Levels<br /><br />Diploid <em>Rhododendron arborescens</em>,<br />Diploid <em>Rhododendron maximum</em>,<br />Diploid <em>Rhododendron periclymenoides</em>,<br />Diploid <em>Rhododendron prinophyllum</em>,<br />Triploid Some deciduous azalea hybrids in Audra State Park,<br />Tetraploid <em>Rhododendron calendulaceum</em><br /><br />Source: Audra State Park<br /><br />John and Sally PerkinsUSAhttp://www.blogger.com/profile/06082901465325697442noreply@blogger.com