Rhododendron 'Hallelujah', which is a Harold Greer hybrid documented as 'The Honourable Jean Marie de Montague' x 'Kimberly', has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca Oliveira, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'Hallelujah'
Source: Greer Gardens
Source: Bob Fox
John and Sally Perkins
Showing posts with label S_Greer. Show all posts
Showing posts with label S_Greer. Show all posts
H: Thursday, June 30, 2011
H: Tuesday, June 28, 2011
'Halopeanum' is a Diploid
Rhododendron 'Halopeanum', which is a 1896 Halopé hybrid documented as Rhododendron griffithianum x Rhododendron maximum, has been determined to be a diploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca Oliveira, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Halopeanum' syn 'White Pearl'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca Oliveira, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Halopeanum' syn 'White Pearl'
Source: Greer Gardens
John and Sally Perkins
H: Thursday, March 17, 2011
'Daviesii' is a Fertile Triploid
Rhododendron 'Daviesii', which is a 1840 Isaac Davies hybrid often documented as Rhododendron viscosum X Rhododendron molle, has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
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.
Davies' notes indicate that 'Daviesii' was produced using "A. sinesis crossed a hardy white azaleas."
Rhododendron 'Viscosepalum', which is often documented to be Rhododendron molle X Rhododendron viscosum, has been determined to be a tetraploid.
The flow cytometry ploidy results for 'Daviesii' and 'Viscosepalum' indicate the pollen parent may have been the tetraploid Rhododendron atlanticum rather than the diploid Rhododendron viscosum. The normal bloom times for Rhododendron molle and Rhododendron atlanticum overlay whereas this is not the case for Rhododendron molle and Rhododendron viscosum. Rhododendron viscosum and Rhododendron atlanticum are known to colocate in the wild.
'Viscosepalum' and 'Daviesii' are sometimes confused in commercial settings.
Rhododendron 'Daviesii' was also determined to be a triploid using flow cytometry by Tom Eeckhaut.
Plants labeled Rhododendron 'Daviesii' have also tested as tetraploid and pentaploid.
Summary of Ploidy Levels
Diploid Rhododendron molle,
Diploid Rhododendron viscosum,
Triploid 'Graf von Meran',
Triploid 'Daviesii',
Triploid 'Gloria Mundi',
Triploid 'Josephine Klinger',
Tetraploid Rhododendron atlanticum,
Tetraploid 'Viscosepalum'
Source: Greer Gardens
Source: Whitney Nursery
Source: Azaleatuin
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
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.
Davies' notes indicate that 'Daviesii' was produced using "A. sinesis crossed a hardy white azaleas."
Rhododendron 'Viscosepalum', which is often documented to be Rhododendron molle X Rhododendron viscosum, has been determined to be a tetraploid.
The flow cytometry ploidy results for 'Daviesii' and 'Viscosepalum' indicate the pollen parent may have been the tetraploid Rhododendron atlanticum rather than the diploid Rhododendron viscosum. The normal bloom times for Rhododendron molle and Rhododendron atlanticum overlay whereas this is not the case for Rhododendron molle and Rhododendron viscosum. Rhododendron viscosum and Rhododendron atlanticum are known to colocate in the wild.
'Viscosepalum' and 'Daviesii' are sometimes confused in commercial settings.
Rhododendron 'Daviesii' was also determined to be a triploid using flow cytometry by Tom Eeckhaut.
Plants labeled Rhododendron 'Daviesii' have also tested as tetraploid and pentaploid.
Summary of Ploidy Levels
Diploid Rhododendron molle,
Diploid Rhododendron viscosum,
Triploid 'Graf von Meran',
Triploid 'Daviesii',
Triploid 'Gloria Mundi',
Triploid 'Josephine Klinger',
Tetraploid Rhododendron atlanticum,
Tetraploid 'Viscosepalum'
Source: Greer Gardens
Source: Whitney Nursery
Source: Azaleatuin
John and Sally Perkins
H: Saturday, January 08, 2011
'Markeeta’s Flame' is a Triploid
Rhododendron 'Markeeta’s Flame', which is Markeeta Nursery hybrid documented as 'Loderi Venus' x 'Anna', has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
In the case of triploid 'Markeeta’s Flame', a diploid crossed with a diploid produced a triploid indicating that unreduced meiosis most likely occurred for one of the diploid parents. In other words, 'Markeeta’s Flame' having 39 chromosomes most likely received 13 from one diploid parent and 26 chromosomes from the other diploid parent.
Rhododendron 'The Honorable Jean Marie de Montague' is known to throw unreduced gametes and Rhododendron 'Anna' has 'The Honorable Jean Marie de Montague' as a parent.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Loderi Venus',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague',
Triploid 'Markeeta’s Flame',
Triploid 'Markeeta's Prize'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
In the case of triploid 'Markeeta’s Flame', a diploid crossed with a diploid produced a triploid indicating that unreduced meiosis most likely occurred for one of the diploid parents. In other words, 'Markeeta’s Flame' having 39 chromosomes most likely received 13 from one diploid parent and 26 chromosomes from the other diploid parent.
Rhododendron 'The Honorable Jean Marie de Montague' is known to throw unreduced gametes and Rhododendron 'Anna' has 'The Honorable Jean Marie de Montague' as a parent.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Loderi Venus',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague',
Triploid 'Markeeta’s Flame',
Triploid 'Markeeta's Prize'
Source: Greer Gardens
John and Sally Perkins
H: Friday, January 07, 2011
'Markeeta's Prize' is a Triploid
Rhododendron 'Markeeta's Prize', which is Markeeta Nursery hybrid documented as 'Loderi Venus' x 'Anna', has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
In the case of triploid 'Markeeta’s Prize', a diploid crossed with a diploid produced a triploid indicating that unreduced meiosis most likely occurred for one of the diploid parents. In other words, 'Markeeta’s Prize' having 39 chromosomes most likely received 13 from one diploid parent and 26 chromosomes from the other diploid parent.
Rhododendron 'The Honorable Jean Marie de Montague' is known to throw unreduced gametes and Rhododendron 'Anna' has 'The Honorable Jean Marie de Montague' as a parent.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Loderi Venus',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague',
Triploid 'Markeeta's Flame',
Triploid 'Markeeta's Prize'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
In the case of triploid 'Markeeta’s Prize', a diploid crossed with a diploid produced a triploid indicating that unreduced meiosis most likely occurred for one of the diploid parents. In other words, 'Markeeta’s Prize' having 39 chromosomes most likely received 13 from one diploid parent and 26 chromosomes from the other diploid parent.
Rhododendron 'The Honorable Jean Marie de Montague' is known to throw unreduced gametes and Rhododendron 'Anna' has 'The Honorable Jean Marie de Montague' as a parent.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Loderi Venus',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague',
Triploid 'Markeeta's Flame',
Triploid 'Markeeta's Prize'
Source: Greer Gardens
John and Sally Perkins
H: Sunday, January 02, 2011
'Red Olympia' is a Diploid
Rhododendron 'Red Olympia', which is a Halfdan Lem hybrid documented as 'Anna' x 'Fusilier Group', has been determined to be a diploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Red Olympia',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Red Olympia',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague'
Source: Greer Gardens
John and Sally Perkins
H: Friday, December 31, 2010
'Jean Marie de Montague' is a Diploid
Rhododendron 'The Honourable Jean Marie de Montague', which is a van Nes hybrid documented as R. griffithianum hybrid, has been determined to be a diploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'The Honourable Jean Marie de Montague' is a parent of 'Anita Gehnrich','Grace Seabrook', 'Hallelujah', 'Solidarity', 'Taurus', and 'Very Berry' which are triploids.
Rhododendron 'The Honourable Jean Marie de Montague' appears to produce unreduced gametes in larger numbers than most diploids.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'The Honourable Jean Marie de Montague',
Diploid 'Wild Affair',
Triploid 'Anita Gehnrich',
Triploid 'Grace Seabrook',
Triploid 'Hallelujah',
Triploid 'Solidarity',
Triploid 'Taurus',
Triploid 'Very Berry'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'The Honourable Jean Marie de Montague' is a parent of 'Anita Gehnrich','Grace Seabrook', 'Hallelujah', 'Solidarity', 'Taurus', and 'Very Berry' which are triploids.
Rhododendron 'The Honourable Jean Marie de Montague' appears to produce unreduced gametes in larger numbers than most diploids.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'The Honourable Jean Marie de Montague',
Diploid 'Wild Affair',
Triploid 'Anita Gehnrich',
Triploid 'Grace Seabrook',
Triploid 'Hallelujah',
Triploid 'Solidarity',
Triploid 'Taurus',
Triploid 'Very Berry'
Source: Greer Gardens
John and Sally Perkins
H: Sunday, December 19, 2010
'Isabel Pierce' is a Diploid
Rhododendron 'Isabel Pierce', which is a Lawrence Pierce hybrid documented as 'Anna' x 'Lem's Goal', has been determined to be a diploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Isabel Pierce',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Isabel Pierce',
Diploid 'Norman Gill',
Diploid 'The Honorable Jean Marie de Montague'
Source: Greer Gardens
John and Sally Perkins
H: Wednesday, December 15, 2010
'Ebony Pearl' is a Triploid
Rhododendron 'Ebony Pearl', which is documented as a sport of 'Pink Pearl', has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Mother of Pearl',
Triploid 'Broughtonii',
Triploid ''Ebony Pearl',
Triploid 'Topsvoort Pearl',
Triploid 'Pink Pearl'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Mother of Pearl',
Triploid 'Broughtonii',
Triploid ''Ebony Pearl',
Triploid 'Topsvoort Pearl',
Triploid 'Pink Pearl'
Source: Greer Gardens
John and Sally Perkins
H: Saturday, December 11, 2010
'Taurus' is a Fertile Triploid
Rhododendron 'Taurus', which is a Frank Mossman hybrid documented as 'The Honourable Jean Marie de Montague' x R. strigillosum, has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Frank Mossman considered Rhododendron 'Taurus' to be his one standout hybridizing achievement.
Rhododendron 'Taurus', although reluctant to be a parent, appears to be both seed and pollen fertile. Werner Brack raised several seedlings from open pollinated seed collected from a 'Taurus' in his garden. The 'Taurus' in the Brack garden was tested and shown to be a triploid. This provides direct evidence that a triploid Rhododendron can indeed set viable seed.
A seedling of a Jack Rosenthal cross of Rhododendron yakushimanum x 'Taurus' was, also, determined to be a triploid.
In the case of the triploid 'Taurus', a diploid crossed with a diploid produced a triploid indicating that unreduced meiosis most likely occurred for one of the diploid parents. In other words, 'Taurus' having 39 chromosomes most likely received 13 from one diploid parent and 26 chromosomes from the other diploid parent.
Rhododendron 'Taurus' was also determined to be a triploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Rhododendron 'Grace Seabrook', which is also documented as 'The Honorable Jean Marie de Montague' x R. strigillosum, has been determined to be a triploid.
Rhododendron 'The Honorable Jean Marie de Montague', although a diploid, is documented as the parent of several triploids indicating 'The Honorable Jean Marie de Montague' may throw more unreduced gametes than most diploids.
Summary of Ploidy Levels
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'Grace Seabrook',
Triploid 'Taurus',
Triploid A seedling of Rhododendron yakushimanum x 'Taurus'
Source: Greer Gardens
Source: Werner Brack
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Frank Mossman considered Rhododendron 'Taurus' to be his one standout hybridizing achievement.
Rhododendron 'Taurus', although reluctant to be a parent, appears to be both seed and pollen fertile. Werner Brack raised several seedlings from open pollinated seed collected from a 'Taurus' in his garden. The 'Taurus' in the Brack garden was tested and shown to be a triploid. This provides direct evidence that a triploid Rhododendron can indeed set viable seed.
A seedling of a Jack Rosenthal cross of Rhododendron yakushimanum x 'Taurus' was, also, determined to be a triploid.
In the case of the triploid 'Taurus', a diploid crossed with a diploid produced a triploid indicating that unreduced meiosis most likely occurred for one of the diploid parents. In other words, 'Taurus' having 39 chromosomes most likely received 13 from one diploid parent and 26 chromosomes from the other diploid parent.
Rhododendron 'Taurus' was also determined to be a triploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Rhododendron 'Grace Seabrook', which is also documented as 'The Honorable Jean Marie de Montague' x R. strigillosum, has been determined to be a triploid.
Rhododendron 'The Honorable Jean Marie de Montague', although a diploid, is documented as the parent of several triploids indicating 'The Honorable Jean Marie de Montague' may throw more unreduced gametes than most diploids.
Summary of Ploidy Levels
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'Grace Seabrook',
Triploid 'Taurus',
Triploid A seedling of Rhododendron yakushimanum x 'Taurus'
Source: Greer Gardens
Source: Werner Brack
John and Sally Perkins
H: Wednesday, December 08, 2010
'Van' is a Triploid
Rhododendron 'Van', which is van Veen introduced by Paul Greibnoween and Harold Greer and documented as R. griersonianum x 'Countess of Derby', has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
In the case of triploid 'Van', a suspected diploid crossed with a tetraploid produced a triploid indicating that normal reduced meiosis most likely occurred for both parents. In other words, 'Van' having 39 chromosomes received 13 chromosomes from the suspected diploid R. griersonianum and 26 chromosomes from the tetraploid 'Countess of Derby'.
Summary of Ploidy Levels
Triploid 'Anna Rose Whitney',
Triploid 'Lucky Strike',
Triploid 'Van',
Tetraploid 'Countess of Derby'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
In the case of triploid 'Van', a suspected diploid crossed with a tetraploid produced a triploid indicating that normal reduced meiosis most likely occurred for both parents. In other words, 'Van' having 39 chromosomes received 13 chromosomes from the suspected diploid R. griersonianum and 26 chromosomes from the tetraploid 'Countess of Derby'.
Summary of Ploidy Levels
Triploid 'Anna Rose Whitney',
Triploid 'Lucky Strike',
Triploid 'Van',
Tetraploid 'Countess of Derby'
Source: Greer Gardens
John and Sally Perkins
H: Thursday, December 02, 2010
'Point Defiance' is a Tetraploid
Rhododendron 'Point Defiance', which is a Halfdan Lem hybrid documented as 'Anna' x 'Marinus Koster', has been determined to be a tetraploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'Point Defiance' has as descendants 'Doreen Gale', 'Gentle Giant', 'Horizon Monarch', 'Julia Caroline', 'Lady of Spain', 'Orange Leopard', and 'Stony Brook'.
In the case of the tetraploid 'Point Defiance', a diploid crossed with a tetraploid produced a tetraploid indicating that unreduced meiosis may have occurred for the diploid parent. In other words, 'Point Defiance' having 52 chromosomes received something similar to 26 chromosomes from the diploid 'Anna' and 26 chromosomes from the tetraploid 'Marinus Koster'.
Rhododendron 'Point Defiance' was also determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Horizon Lakeside',
Diploid 'Nancy Evans',
Diploid 'Norman Gill',
Diploid 'Orange Leopard',
Diploid 'Stony Brook',
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'El Camino',
Triploid 'Julia Caroline',
Triploid 'Lady of Spain',
Triploid 'Platinum Pearl',
Tetraploid 'Doreen Gale',
Tetraploid 'Gentle Giant',
Tetraploid 'Horizon Monarch',
Tetraploid 'Lem's Monarch',
Tetraploid 'Marinus Koster',
Tetraploid 'Pink Walloper',
Tetraploid 'Point Defiance',
Tetrsploid 'Trude Webster',
Tetraploid 'Walloper No. 10'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'Point Defiance' has as descendants 'Doreen Gale', 'Gentle Giant', 'Horizon Monarch', 'Julia Caroline', 'Lady of Spain', 'Orange Leopard', and 'Stony Brook'.
In the case of the tetraploid 'Point Defiance', a diploid crossed with a tetraploid produced a tetraploid indicating that unreduced meiosis may have occurred for the diploid parent. In other words, 'Point Defiance' having 52 chromosomes received something similar to 26 chromosomes from the diploid 'Anna' and 26 chromosomes from the tetraploid 'Marinus Koster'.
Rhododendron 'Point Defiance' was also determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Horizon Lakeside',
Diploid 'Nancy Evans',
Diploid 'Norman Gill',
Diploid 'Orange Leopard',
Diploid 'Stony Brook',
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'El Camino',
Triploid 'Julia Caroline',
Triploid 'Lady of Spain',
Triploid 'Platinum Pearl',
Tetraploid 'Doreen Gale',
Tetraploid 'Gentle Giant',
Tetraploid 'Horizon Monarch',
Tetraploid 'Lem's Monarch',
Tetraploid 'Marinus Koster',
Tetraploid 'Pink Walloper',
Tetraploid 'Point Defiance',
Tetrsploid 'Trude Webster',
Tetraploid 'Walloper No. 10'
Source: Greer Gardens
John and Sally Perkins
H: Tuesday, November 30, 2010
'Gentle Giant' is a Tetraploid
Rhododendron 'Gentle Giant', which is a D. Sanders hybrid documented as 'Point Defiance' x 'Platinum Pearl', has been determined to be a tetraploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'Gentle Giant' has as ancestors 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', 'Platinum Pearl', 'Norman Gill', 'The Honourable Jean Marie de Montague', 'Anna', 'Marinus Koster', and 'Point Defiance'.
Both of the parents of 'Gentle Giant' have 'George Hardy' as an ancestor.
In the case of the tetraploid 'Gentle Giant', a tetraploid crossed with a triploid produced a tetraploid indicating that reduced meiosis most likely occurred for both parents. In other words, 'Gentle Giant' having 52 chromosomes received something similar to 26 chromosomes each from both the tetraploid 'Point Defiance' and the triploid 'Platinum Pearl'.
Rhododendron 'Gentle Giant' was also determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Norman Gill',
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Triploid 'Platinum Pearl'
Tetraploid 'Countess of Derby',
Tetraploid 'Gentle Giant',
Tetraploid 'Marinus Koster',
Tetraploid 'Point Defiance',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'Gentle Giant' has as ancestors 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', 'Platinum Pearl', 'Norman Gill', 'The Honourable Jean Marie de Montague', 'Anna', 'Marinus Koster', and 'Point Defiance'.
Both of the parents of 'Gentle Giant' have 'George Hardy' as an ancestor.
In the case of the tetraploid 'Gentle Giant', a tetraploid crossed with a triploid produced a tetraploid indicating that reduced meiosis most likely occurred for both parents. In other words, 'Gentle Giant' having 52 chromosomes received something similar to 26 chromosomes each from both the tetraploid 'Point Defiance' and the triploid 'Platinum Pearl'.
Rhododendron 'Gentle Giant' was also determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Norman Gill',
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Triploid 'Platinum Pearl'
Tetraploid 'Countess of Derby',
Tetraploid 'Gentle Giant',
Tetraploid 'Marinus Koster',
Tetraploid 'Point Defiance',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
H: Monday, November 29, 2010
'Grand Slam' is a Tetraploid
Rhododendron 'Grand Slam', which is a Harold Greer hybrid documented as 'Trude Webster' x 'Lydia', has been determined to be a tetraploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'Grand Slam' has as ancestors 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', 'Antoon van Welie', and 'Lydia'.
Both of the parents of 'Grand Slam' have 'Pink Pearl' as an ancestor.
In the case of the tetraploid 'Grand Slam', a tetraploid crossed with a triploid produced a tetraploid indicating that reduced meiosis most likely occurred for both parents. In other words, 'Grand Slam' having 52 chromosomes received something similar to 26 chromosomes each from both the tetraploid 'Trude Webster' and the triploid 'Lydia'.
Rhododendron 'Grand Slam' was also determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Lydia',
Triploid 'Pink Pearl',
Tetraploid 'Antoon van Welie',
Tetraploid 'Countess of Derby',
Tetraploid 'Grand Slam',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Rhododendron 'Grand Slam' has as ancestors 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', 'Antoon van Welie', and 'Lydia'.
Both of the parents of 'Grand Slam' have 'Pink Pearl' as an ancestor.
In the case of the tetraploid 'Grand Slam', a tetraploid crossed with a triploid produced a tetraploid indicating that reduced meiosis most likely occurred for both parents. In other words, 'Grand Slam' having 52 chromosomes received something similar to 26 chromosomes each from both the tetraploid 'Trude Webster' and the triploid 'Lydia'.
Rhododendron 'Grand Slam' was also determined to be a tetraploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Lydia',
Triploid 'Pink Pearl',
Tetraploid 'Antoon van Welie',
Tetraploid 'Countess of Derby',
Tetraploid 'Grand Slam',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
H: Friday, November 05, 2010
'Very Berry' is a Tetraploid
Rhododendron 'Very Berry', which is a Harold Greer hybrid documented as 'Trude Webster' x 'The Honorable Jean Marie de Montague', has been determined to be a tetraploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Very Berry' has 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', and 'The Honorable Jean Marie de Montague' as ancestors. 'Verry Berry' appears to be another case where 'The Honorable Jean Marie de Montague' threw unreduced gametes.
Summary of Ploidy Levels
Diploid 'The Honorable Jean Marie de Montague',
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Tetraploid 'Countess of Derby',
Tetraploid 'Trude Webster',
Tetraploid 'Very Berry'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Very Berry' has 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', and 'The Honorable Jean Marie de Montague' as ancestors. 'Verry Berry' appears to be another case where 'The Honorable Jean Marie de Montague' threw unreduced gametes.
Summary of Ploidy Levels
Diploid 'The Honorable Jean Marie de Montague',
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Tetraploid 'Countess of Derby',
Tetraploid 'Trude Webster',
Tetraploid 'Very Berry'
Source: Greer Gardens
John and Sally Perkins
H: Thursday, November 04, 2010
'Sugar Pink' is a Triploid
Rhododendron 'Sugar Pink', which is a Harold Greer hybrid documented as 'Trude Webster' x ('Fawn' x 'Queen o' the May Group'), has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Sugar Pink' has 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Trude Webster' as ancestors.
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Triploid 'Sugar Pink',
Tetraploid 'Countess of Derby',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Sugar Pink' has 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Trude Webster' as ancestors.
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Triploid 'Sugar Pink',
Tetraploid 'Countess of Derby',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
H: Wednesday, November 03, 2010
'Platinum Pearl' is a Fertile Triploid
Rhododendron 'Platinum Pearl', which is a Harold Greer hybrid documented as 'Trude Webster' x R. fortunei ssp. discolor, has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Platinum Pearl', which has 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Trude Webster' as ancestors, is the pollen parent of 'Gentle Giant'. 'Point Defiance', which has 'Marinus Koster' as an ancestor, is the seed parent of 'Gentle Giant'.
Notice 'Gentle Giant' represents the merging of 2 multi-generational polyploid lines, namely 1) 'Broughtonii' (3x), 'Pink Pearl' (3x), 'Countess of Derby (4x)' (polyploid), 'Trude Webster' (4x), 'Platinum Pearl' (3x), to 'Gentle Giant' (4x) and 2) 'Marinus Koster' (4x), 'Point Defiance' (4x), to 'Gentle Giant' (4x).
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Triploid 'Platinum Pearl',
Tetraploid 'Countess of Derby',
Tetraploid 'Gentle Giant',
Tetraploid 'Marinus Koster',
Tetraploid 'Point Defiance',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Platinum Pearl', which has 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Trude Webster' as ancestors, is the pollen parent of 'Gentle Giant'. 'Point Defiance', which has 'Marinus Koster' as an ancestor, is the seed parent of 'Gentle Giant'.
Notice 'Gentle Giant' represents the merging of 2 multi-generational polyploid lines, namely 1) 'Broughtonii' (3x), 'Pink Pearl' (3x), 'Countess of Derby (4x)' (polyploid), 'Trude Webster' (4x), 'Platinum Pearl' (3x), to 'Gentle Giant' (4x) and 2) 'Marinus Koster' (4x), 'Point Defiance' (4x), to 'Gentle Giant' (4x).
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Pink Pearl',
Triploid 'Platinum Pearl',
Tetraploid 'Countess of Derby',
Tetraploid 'Gentle Giant',
Tetraploid 'Marinus Koster',
Tetraploid 'Point Defiance',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
H: Tuesday, November 02, 2010
'Lydia' is a Fertile Triploid
Rhododendron 'Lydia', which is a Harold Greer hybrid documented as 'Antoon van Welie' x 'Day Dream Group', has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Lydia', which has 'Broughtonii', 'Pink Pearl', and 'Antoon van Welie' as ancestors, is the pollen parent of 'Grand Slam'. 'Trude Webster', which has 'Broughtonii', 'Pink Pearl', and 'Countess of Derby' as ancestors, is the seed parent of 'Grand Slam'.
Notice 'Grand Slam' represents the merging of 2 multi-generational polyploid lines, namely 1)'Broughtonii' (3x), 'Pink Pearl' (3x), 'Cynthia' (3x), 'Countess of Derby' (4x), 'Trude Webster' (4x), to 'Grand Slam' (4x) and 2)'Broughtonii' (3x), 'Pink Pearl' (3x), 'Antoon van Welie' (4x), Lydia (3x) to Grand Slam (4x).
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Lydia',
Triploid 'Pink Pearl',
Tetraploid 'Grand Slam',
Tetraploid 'Antoon van Welie',
Tetraploid 'Countess of Derby',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Lydia', which has 'Broughtonii', 'Pink Pearl', and 'Antoon van Welie' as ancestors, is the pollen parent of 'Grand Slam'. 'Trude Webster', which has 'Broughtonii', 'Pink Pearl', and 'Countess of Derby' as ancestors, is the seed parent of 'Grand Slam'.
Notice 'Grand Slam' represents the merging of 2 multi-generational polyploid lines, namely 1)'Broughtonii' (3x), 'Pink Pearl' (3x), 'Cynthia' (3x), 'Countess of Derby' (4x), 'Trude Webster' (4x), to 'Grand Slam' (4x) and 2)'Broughtonii' (3x), 'Pink Pearl' (3x), 'Antoon van Welie' (4x), Lydia (3x) to Grand Slam (4x).
Summary of Ploidy Levels
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Lydia',
Triploid 'Pink Pearl',
Tetraploid 'Grand Slam',
Tetraploid 'Antoon van Welie',
Tetraploid 'Countess of Derby',
Tetraploid 'Trude Webster'
Source: Greer Gardens
John and Sally Perkins
H: Sunday, October 24, 2010
'Trude Webster' is a Tetraploid
Rhododendron 'Trude Webster', which is a Harold Greer hybrid documented as 'Countess of Derby' X 'Countess of Derby', has been determined to be a tetraploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
The hybridization work of Jim Barlup indicates that 'Trude Webster' is fertile in both directions when crossed with known and suspected polyploid elepidotes.
'Countess of Derby', which was determined to be a tetraploid, is the documented pollen parent of 'Anna Rose Whitney', which has been determined to be a triploid by the Coimbra based research team.
'Pink Pearl', which is the documented seed parent of 'Countess of Derby', was also determined to be a triploid by the Coimbra based research team.
'Cynthia', which is the documented pollen parent of 'Countess of Derby', was also determined to be a triploid by the Coimbra based research team.
The findings of the Coimbra based research team indicate 6 multi generational polyploid branches starting with the triploid 'Broughtonii', namely 1)'Broughtonii', 'Pink Pearl', 'Gomer Waterer', and 'Phyllis Korn', 2)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Anna Rose Whitney', 3)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Van',
4)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Lucky Strike',
5)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', 'Platinum Pearl', and 'Gentle Giant' and 6)'Broughtonii', 'Pink Pearl', 'Antoon van Welie', 'Lydia', 'Trude Webster', and 'Grand Slam'.
Summary of Ploidy Levels
Triploid 'Anna Rose Whitney',
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Gomer Waterer',
Triploid 'Lydia',
Triploid 'Lucky Strike',
Triploid 'Pink Pearl',
Triploid 'Phyllis Korn',
Triploid 'Platinum Pearl',
Triploid 'Van',
Tetraploid 'Antoon van Welie',
Tetraploid 'Countess of Derby',
Tetraploid 'Gentle Giant',
Tetraploid 'Grand Slam',
Tetraploid 'Trude Webster'
Source: Greer Gardens
Source: Bob Fox
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
The hybridization work of Jim Barlup indicates that 'Trude Webster' is fertile in both directions when crossed with known and suspected polyploid elepidotes.
'Countess of Derby', which was determined to be a tetraploid, is the documented pollen parent of 'Anna Rose Whitney', which has been determined to be a triploid by the Coimbra based research team.
'Pink Pearl', which is the documented seed parent of 'Countess of Derby', was also determined to be a triploid by the Coimbra based research team.
'Cynthia', which is the documented pollen parent of 'Countess of Derby', was also determined to be a triploid by the Coimbra based research team.
The findings of the Coimbra based research team indicate 6 multi generational polyploid branches starting with the triploid 'Broughtonii', namely 1)'Broughtonii', 'Pink Pearl', 'Gomer Waterer', and 'Phyllis Korn', 2)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Anna Rose Whitney', 3)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Van',
4)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', and 'Lucky Strike',
5)'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby', 'Trude Webster', 'Platinum Pearl', and 'Gentle Giant' and 6)'Broughtonii', 'Pink Pearl', 'Antoon van Welie', 'Lydia', 'Trude Webster', and 'Grand Slam'.
Summary of Ploidy Levels
Triploid 'Anna Rose Whitney',
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Gomer Waterer',
Triploid 'Lydia',
Triploid 'Lucky Strike',
Triploid 'Pink Pearl',
Triploid 'Phyllis Korn',
Triploid 'Platinum Pearl',
Triploid 'Van',
Tetraploid 'Antoon van Welie',
Tetraploid 'Countess of Derby',
Tetraploid 'Gentle Giant',
Tetraploid 'Grand Slam',
Tetraploid 'Trude Webster'
Source: Greer Gardens
Source: Bob Fox
John and Sally Perkins
H: Thursday, October 07, 2010
'Olin O. Dobbs' is a Diploid
Rhododendron 'Olin O. Dobbs', which is a Dobbs hybrid documented as 'Mars' x 'Purple Splendour', has been determined to be a diploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Olin O. Dobbs'
Source: Greer Gardens
John and Sally Perkins
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
Summary of Ploidy Levels
Diploid 'Olin O. Dobbs'
Source: Greer Gardens
John and Sally Perkins
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