One seedling of Rhododendron 'Canobie Candy' X Rhododendron flammeum 'Hazel Hamilton', which is Sally and John Perkins 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.
In this case, a diploid crossed with a diploid produced a diploid (26 chromosomes) indicating normal meiosis occurred where each diploid parent contributed a 1x gamete (13 chromosomes). Diploid X diploid yielding diploid is the expected outcome.
Summary of Ploidy Levels
Diploid Rhododendron canescens,
Diploid Rhododendron flammeum,
Diploid Rhododendron flammeum 'Hazel Hamilton',
Diploid 'Canobie Candy',
Diploid One seedling of 'Canobie Candy' X 'Hazel Hamilton'
Source: Joe Bruso
John and Sally Perkins
