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Breeding for Improved Germination Under Water Stress, and Genetic Analyses of Flowering Habit and Male Sterility in Russian Dandelion (Taraxacum kok-saghyz)

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Title: Breeding for Improved Germination Under Water Stress, and Genetic Analyses of Flowering Habit and Male Sterility in Russian Dandelion (Taraxacum kok-saghyz)
Author: Hodgson-Kratky, Katrina
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Wolyn, David
Abstract: Russian dandelion (Taraxacum kok-saghyz Rodin) may serve as a new source of natural rubber; however, domestication of the species is required for cultivation. This research focused on vital issues related to crop development, including improving germination under water-stress, and determining inheritance of flowering habit and male sterility. Three cycles of phenotypic and half-sib family recurrent selection increased germination 34.5% and 42.5%, and reduced germination time 3 and 5 d, respectively, for seeds incubated at low water potential. Phenotypic segregation of progeny from crosses between spring-type and winter-type plants and between male sterile and male-fertile plants suggested that three major loci control flowering habit and cytoplasmic male sterility can be restored to fertility by a nuclear restorer of fertility gene. These results demonstrate that Russian dandelion has potential to be adapted as a crop for rubber production in North America.
URI: http://hdl.handle.net/10214/8888
Date: 2015-05
Rights: Attribution-NoDerivs 2.5 Canada


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Attribution-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NoDerivs 2.5 Canada