Remarkable cytotype co-existence of Pilosella echioides: the only known sexual system with triploid dominance

Name: Remarkable cytotype co-existence of Pilosella echioides: the only known sexual system with triploid dominance
Researchers: Kubátová Barbora (co-researcher)
Píšová Soňa (member in research team)
Trávníček Pavel (researcher)
Urfus Tomáš (co-researcher)
Zahradníček Jaroslav (member in research team)
Project Type: B - national grants (GA ČR, GA AVČR)
Realization from: 2013
Realization to: 2015
Summary: Inter-cytotype interactions in mixed-ploidy populations are usually suppressed by pre-zygotic isolation mechanisms because of impact of post-zygotic barriers (e.g. triploid block). Contrary to this common scenario our model group of Pilosella echioides is supposed to be the first candidate of the system in plants with strictly sexual mode of reproduction that behaves differently. Co-existence of up to five cytotypes of Pilosella echioides is likely maintained by free mating interactions and absence of both pre- and post-zygotic isolation barriers. Moreover occasional triploid dominance in mixed-ploidy populations makes uniqueness of the system and deserves special attention. Proposed project is aimed to reveal inter-cytotype interactions, the drive(s) that maintain the mixed-ploidy system and the function of triploids. Complex data analysis and integrative approach combining various biosystematic methods will elucidate the functioning of multi-ploidy system with triploid dominance and virtually absence of pre- and post- zygotic isolation barriers

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