Rhododendron 'Super Dog', which is a Dan Bones hybrid documented as 'Confusion' x 'Pink Walloper', 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 the triploid 'Super Dog', a suspected diploid crossed with a tetraploid produced a triploid indicating that normal reduced meiosis most likely occurred for the tetraploid parent. In other words, 'Super Dog' having 39 chromosomes most likely received 13 chromosomes from 'Confusion' and 26 chromosomes from the tetraploid 'Trude Webster'.
Summary of Ploidy Levels
Diploid 'Anna',
Diploid 'Norman Gill',
Diploid 'The Honourable Jean Marie de Montague',
Triploid 'Super Dog',
Tetraploid 'Marinus Koster',
Tetraploid 'Pink Walloper'
Source: Whitney Nursery
John and Sally Perkins
