Mixed-ploidy species: Progress and opportunities in polyploid research

0495460 - BÚ 2019 RIV GB eng J - Journal Article
Kolář, Filip - Čertner, Martin - Suda, Jan - Schönswetter, P. - Husband, B. C.
Mixed-ploidy species: Progress and opportunities in polyploid research.
Trends in Plant Science. Roč. 22, č. 12 (2017), s. 1041-1055. ISSN 1360-1385. E-ISSN 1878-4372
Institutional support: RVO:67985939
Keywords : cytotype coexistence * contact zones * polyploid establishment
OECD category: Plant sciences, botany
Impact factor: 12.149, year: 2017

We reviewed the available literature on cytotype diversity, cytotype distribution patterns and mechanisms of ploidy coexistence in 69 mixed-ploidy species from 29 angiosperm families. The cytotype diversity retained in natural populations of these species was relatively high, comprising on average 3.5 cytotypes (range = 2 to 8). Local ploidy coexistence (i.e. within populations) was documented in most mixed-ploidy species, occurring on average in 16.1% of sampled populations. The most frequently reported mechanism facilitating cytotype coexistence was spatial segregation of cytotypes on various spatial scales, which usually stemmed from niche differentiation of cytotypes, their colonization history, and/or limited dispersal. Our literature survey also pointed out the importance of asexual reproduction for ploidy coexistence. Not only was the incidence of mixed-ploidy populations twice as common in species with predominantly asexual reproduction (26.7% vs. 14.6%) but such species could also harbor relatively high frequencies of odd-ploidy cytotypes.
Permanent Link: http://hdl.handle.net/11104/0290702