Diploid Tsutsusi Rhododendron Species

In the paper "Flow Cytometric Analysis of Ploidy in Rhododendron (subgenus Tsutsusi)", S. De Schepper1, L. Leus, M. Mertens, E. Van Bockstaele, and M. De Loose found 6 Rhododendron species of section Tsutsusi to be diploid.

In the paper "Ploidy Levels and Relative Genome Sizes of Diverse Species, Hybrids, and Cultivars of Rhododendron", Jeff R. Jones, Thomas G. Ranney, Nathan P. Lynch, and Stephen L. Krebs found 1 Rhododendron species of section Tsutsusi to be diploid. Results from this paper are denoted by ^j.

Triploids hybrid evergreen azaleas from these 2 papers are also listed here.

Diploid

Rhododendron indicum
Rhododendron kiusianum
Rhododendron mucronatum
Rhododendron noriakianum
Rhododendron scabrum
Rhododendron simsii
Rhododendron stenopetalum ‘Linearifolium’ ^j

Triploid

'Crimson Majesty' ^j
'Euratom'
'Euratom Orange'
'Red Wing'

Mixaploid

'Casablanca Tetra'

'H. H. Hume' is a Diploid

Rhododendron 'H. H. Hume', which is documented to be a Beltsville azalea, 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 'H. H. Hume',
Diploid 'Snow'

Source: Mike Creel

John and Sally Perkins

'Kurume Snow' is a Diploid

Rhododendron 'Kurume Snow', which is documented to be a Kurume azalea, 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.

Rhododendron 'Snow' tests at the lowest most end of the range for diploid Rhododendrons which may indicate that evergreen azaleas have a smaller genome size than most other Rhododendrons.

Summary of Ploidy Levels

Diploid 'H. H. Hume',
Diploid 'Kurume Snow'

Source: Mike Creel

John and Sally Perkins

Rhododendron yeodense var. poukanense is a Diploid

Rhododendron yeodense var. poukanense 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 Rhododendron yeodense var. poukanense

Source: Arnold Arboretum Accession Number: 793-84

John and Sally Perkins

Rhododendron nakaharae is a Diploid

Rhododendron nakaharae 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 Rhododendron nakaharae

Source: John and Sally Perkins

John and Sally Perkins

Rhododendron kiusianum is a Diploid

Rhododendron kiusianum 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 Rhododendron kiusianum

Source: John and Sally Perkins

John and Sally Perkins

'Canobie Sunset' is a Triploid

Rhododendron 'Canobie Sunset', which is Sally and John Perkins introduction documented as 'Fedora' open pollinated, 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.

'Canobie Sunset' is an evergreen azalea.

Summary of Ploidy Levels

Triploid 'Canobie Sunset'

Source: John and Sally Perkins

John and Sally Perkins