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- doi: 10.7554/eLife.62858
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info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_F53D45761A433
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Qiaowei Pan et al., « The rise and fall of the ancient northern pike master sex determining gene », Serveur académique Lausannois, ID : 10.7554/eLife.62858
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The understanding of the evolution of variable sex determination mechanisms across taxa requires comparative studies among closely related species. Following the fate of a known master sex-determining gene, we traced the evolution of sex determination in an entire teleost order (Esociformes). We discovered that the northern pike (Esox lucius) master sex-determining gene originated from a 65 to 90 million-year-old gene duplication event and that it remained sex-linked on undifferentiated sex chromosomes for at least 56 million years in multiple species. We identified several independent species- or population-specific sex determination transitions, including a recent loss of a Y-chromosome. These findings highlight the diversity of evolutionary fates of master sex-determining genes and the importance of population demographic history in sex determination studies. We hypothesize that occasional sex reversals and genetic bottlenecks provide a non-adaptive explanation for sex determination transitions.