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- W2952393695 abstract "Abstract Switches in heterogamety are known to occur in both animals and plants. Although plant sex determination systems probably often evolved more recently than those in several well-studied animals, including mammals, and have had less time for switches to occur, we previously detected a switch in heterogamety in the plant genus Silene : section Otites has both female and male heterogamety, whereas S . latifolia and its close relatives, in a different section of the genus, Melandrium (subgenus Behenantha ), all have male heterogamety. Here we analyse the evolution of sex chromosomes in section Otites , which is estimated to have evolved only about 0.55 MYA. Our study confirms female heterogamety in S . otites and newly reveals female heterogamety in S . borysthenica . Sequence analyses and genetic mapping show that the sex-linked regions of these two species are the same, but the region in S . colpophylla , a close relative with male heterogamety, is different. The sex chromosome pairs of S . colpophylla and S . otites each correspond to an autosome of the other species, and both differ from the XY pair in S . latifolia . Silene section Otites species are suitable for detailed studies of the events involved in such changes, and our phylogenetic analysis suggests a possible change from female to male heterogamety within this section. Our analyses suggest a possibility that has so far not been considered, change in heterogamety through hybridization, in which a male-determining chromosome from one species is introgressed into another one, and over-rides its previous sex-determining system." @default.
- W2952393695 created "2019-06-27" @default.
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- W2952393695 date "2019-01-31" @default.
- W2952393695 modified "2023-10-18" @default.
- W2952393695 title "Evolution of sex determination and heterogamety changes in section Otites of the genus Silene" @default.
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