Widespread co-occurrence of multiple ploidy levels in fragile ferns (Cystopteris fragilis complex, Cystopteridaceae) probably stems from similar ecology of cytotypes, their efficient dispersal and inter-ploidy hybridization

0510405 - BÚ 2020 RIV GB eng J - Článek v odborném periodiku
Hanušová, K. - Čertner, Martin - Urfus, T. - Koutecký, P. - Košnar, J. - Rothfels, C. J. - Jarolímová, Vlasta - Ptáček, J. - Ekrt, L.
Widespread co-occurrence of multiple ploidy levels in fragile ferns (Cystopteris fragilis complex, Cystopteridaceae) probably stems from similar ecology of cytotypes, their efficient dispersal and inter-ploidy hybridization.
Annals of Botany. Roč. 123, č. 5 (2019), s. 845-855. ISSN 0305-7364. E-ISSN 1095-8290
Grant CEP: GA ČR GB14-36079G
Institucionální podpora: RVO:67985939
Klíčová slova: cytotype coexistence * ferns * ploidy distribution
Obor OECD: Plant sciences, botany
Impakt faktor: 4.005, rok: 2019
Způsob publikování: Omezený přístup

While polyploidy has played an important role in the evolution of ferns, the dearth of data on cytotype diversity, cytotype distribution patterns and ecology in ferns is striking in comparison with angiosperms. We employed flow cytometry to assess DNA ploidy level and monoploid genome size (Cx value) of 5518 C. fragilis individuals collected over most part of the species distributional range and complemented it with data on ecological preferences. Two predominant C. fragilis cytotypes, tetraploids and hexaploids, co-occur over most of Europe in a diffuse, mosaic-like pattern. Within this contact zone, 40% of populations were mixed-ploidy and most also contained pentaploid hybrids. The high ploidy-level diversity and widespread cytotype coexistence observed in Cystopteris matches the well-documented patterns in some angiosperms. Independent origins of hexaploids and/or inter-ploidy gene flow may be expected in mixed-ploidy populations according to Cx value comparisons. Environmental conditions had only a limited effect on the distribution of cytotypes.
Trvalý link: http://hdl.handle.net/11104/0302490