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- W2466647528 endingPage "1235" @default.
- W2466647528 startingPage "1223" @default.
- W2466647528 abstract "PREMISE OF THE STUDY: Flowering plants display a variety of sexual systems, ranging from complete cosexuality (hermaphroditism) to separate‐sexed individuals (dioecy). While dioecy is relatively rare, it has evolved many times and is present in many plant families. Transitions in sexual systems are hypothesized to be affected by large genomic events such as whole‐genome duplication, or polyploidy, and several models have been proposed to explain the observed patterns of association. METHODS: In this study, we assessed the association between ploidy and sexual system (separate or combined sexes). To this end, we assembled a database of ploidy levels and sexual systems for ∼1000 species, spanning 18 genera and 15 families. We applied several phylogenetic comparative approaches, including Pagel's coevolutionary framework and sister clade analyses, for detecting correlations between ploidy level and sexual system. KEY RESULTS: Our results indicate a broad association between polyploidy and sexual system dimorphism, with low evolutionary stability of the diploid‐dioecious condition observed in several clades. A detailed examination of the clades exhibiting this correlation reveals that it is underlain by various patterns of transition rate asymmetry. CONCLUSIONS: We conclude that the long‐hypothesized connection between ploidy and sexual system holds in some clades, although it may well be affected by factors that differ from clade to clade. Our results further demonstrate that to better understand the evolutionary processes involved, more sophisticated methods and extensive and detailed data sets are required for both broad and focused inquiry." @default.
- W2466647528 created "2016-07-22" @default.
- W2466647528 creator A5024800697 @default.
- W2466647528 creator A5037877880 @default.
- W2466647528 creator A5049114718 @default.
- W2466647528 creator A5060994837 @default.
- W2466647528 creator A5091307061 @default.
- W2466647528 date "2016-06-27" @default.
- W2466647528 modified "2023-10-03" @default.
- W2466647528 title "Polyploidy and sexual system in angiosperms: Is there an association?" @default.
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