Drift-induced selection between male and female heterogamety
Genetics, ISSN: 1943-2631, Vol: 207, Issue: 2, Page: 711-727
2017
- 33Citations
- 42Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations33
- Citation Indexes33
- 33
- CrossRef30
- Captures42
- Readers42
- 42
Article Description
Evolutionary transitions between male and female heterogamety are common in both vertebrates and invertebrates. Theoretical studies of these transitions have found that, when all genotypes are equally fit, continuous paths of intermediate equilibria link the two sex chromosome systems. This observation has led to a belief that neutral evolution along these paths can drive transitions, and that arbitrarily small fitness differences among sex chromosome genotypes can determine the system to which evolution leads. Here, we study stochastic evolutionary dynamics along these equilibrium paths. We find non-neutrality, both in transitions retaining the ancestral pair of sex chromosomes, and in those creating a new pair. In fact, substitution rates are biased in favor of dominant sex determining chromosomes, which fix with higher probabilities than mutations of no effect. Using diffusion approximations, we show that this non-neutrality is a result of “drift-induced selection” operating at every point along the equilibrium paths: stochastic jumps off the paths return with, on average, a directional bias in favor of the dominant segregating sex chromosome. Our results offer a novel explanation for the observed preponderance of dominant sex determining genes, and hint that drift-induced selection may be a common force in standard population genetic systems.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85030666936&origin=inward; http://dx.doi.org/10.1534/genetics.117.300151; http://www.ncbi.nlm.nih.gov/pubmed/28821587; https://academic.oup.com/genetics/article/207/2/711/5930680; https://www.zora.uzh.ch/id/eprint/145089; http://dx.doi.org/10.5167/uzh-145089; https://dx.doi.org/10.5167/uzh-145089; https://www.zora.uzh.ch/id/eprint/145089/; https://dx.doi.org/10.1534/genetics.117.300151; https://academic.oup.com/genetics/article-pdf/207/2/711/37866018/genetics0711.pdf; http://www.genetics.org/content/207/2/711; http://www.genetics.org/content/207/2/711.abstract; http://www.genetics.org/content/207/2/711.full.pdf; http://www.genetics.org/lookup/doi/10.1534/genetics.117.300151; https://www.zora.uzh.ch/id/eprint/145089/1/genetics.117.300151.full-1.pdf; https://www.genetics.org/content/207/2/711; https://f1000.com/prime/728776917#eval793541153
Oxford University Press (OUP)
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