H: Tuesday, November 09, 2010

'Opal Thornton' is a Triploid

Rhododendron 'Opal Thornton', which is a John Thornton hybrid documented as 'Antoon van Welie' x R. hyperythrum, 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.

John Thornton's Breeding Rhododendrons for the Gulf South

Summary of Ploidy Levels

Triploid 'Opal Thornton',
Tetraploid 'Antoon van Welie'

Source: Rarefind Nursery

John and Sally Perkins
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