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- W3099972451 abstract "Abstract Identifying patterns in genetic structure and the genetic basis of ecological adaptation is a core goal of evolutionary biology and can inform the management and conservation of species that are vulnerable to population declines exacerbated by climate change. We used reduced representation genomic sequencing methods to gain a better understanding of genetic structure among and within populations of Lake Tanganyika’s two sardine species, Limnothrissa miodon and Stolothrissa tanganicae . Samples of these ecologically and economically important species were collected across the length of Lake Tanganyika, as well as from nearby Lake Kivu, where L. miodon was introduced in 1959. Our results reveal unexpected differentiation within both S. tanganicae and L. miodon that is not explained by geography. Instead, this genetic differentiation is due to the presence of large sex-specific regions in the genomes of both species, but involving different polymorphic sites in each species. Our results therefore indicate rapidly evolving XY sex determination in the two species. Additionally, we found evidence of a large segregating inversion in L. miodon . We found all inversion karyotypes throughout Lake Tanganyika, but the frequencies vary along a north-south gradient, and differ substantially in the introduced Lake Kivu population. We do not find evidence for significant isolation-by-distance, even over the hundreds of kilometers covered by our sampling, but we do find shallow population structure." @default.
- W3099972451 created "2020-11-23" @default.
- W3099972451 creator A5002936351 @default.
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- W3099972451 date "2019-10-15" @default.
- W3099972451 modified "2023-09-26" @default.
- W3099972451 title "Structural genomic variation leads to unexpected genetic differentiation in Lake Tanganyika’s sardines" @default.
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