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- W4313220788 abstract "Abstract Across the tree of life, species have repeatedly evolved similar phenotypes. While well-studied for ecological traits, there is also evidence for convergent evolution of sexually selected traits. Swordtail fish ( Xiphophorus ) are a classic model system for studying sexual selection, and female Xiphophorus exhibit strong mate preferences for large male body size and a range of sexually dimorphic ornaments. However, sexually selected traits have been lost multiple times in the genus. Phylogenetic relationships between species in this group have historically been controversial, likely as a result of prevalent gene flow, resulting in uncertainty over the number of losses of ornamentation and large body size. Here, we use whole-genome sequencing approaches to re-examine phylogenetic relationships within a Xiphophorus clade that varies in the presence and absence of sexually selected traits. Using wild-caught individuals, we determine the phylogenetic placement of a small, unornamented species, X. continens , confirming an additional loss of ornamentation and large body size in the clade. With these revised phylogenetic relationships, we analyze evidence for coevolution between body size and other sexually selected traits using a phylogenetically independent contrasts approach. These results provide insights into the evolutionary pressures driving the recurrent loss of suites of sexually selected traits." @default.
- W4313220788 created "2023-01-06" @default.
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- W4313220788 date "2022-12-25" @default.
- W4313220788 modified "2023-10-18" @default.
- W4313220788 title "Recurrent evolution of small body size and loss of the sword ornament in Northern Swordtail fish" @default.
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