Rhododendron 'Diane', which is a Koster hybrid documented as a 'Mrs. Lindsay Smith' 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.
'Diane' is the seed parent of 'Phyllis Korn', which is a triploid. 'Gomer Waterer', which is a triploid and has 'Broughtonii' and 'Pink Pearl' as ancestors, is the pollen parent of 'Phyllis Korn'.
Summary of Ploidy Levels
Diploid 'Diane',
Diploid 'Mrs. Lindsay Smith',
Diploid 'Rothenburg',
Triploid 'Broughtonii',
Triploid 'Gomer Waterer',
Triploid 'Phyllis Korn',
Triploid 'Pink Pearl'
Source: Whitney Nursery
John and Sally Perkins
