2024
DOI: 10.1093/evolut/qpae146
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Sperm competition intensity shapes divergence in both sperm morphology and reproductive genes across murine rodents

Emily E K Kopania,
Gregg W C Thomas,
Carl R Hutter
et al.

Abstract: It remains unclear how variation in the intensity of sperm competition shapes phenotypic and molecular evolution across clades. Mice and rats in the subfamily Murinae are a rapid radiation exhibiting incredible diversity in sperm morphology and production. We combined phenotypic and genomic data to perform phylogenetic comparisons of male reproductive traits and genes across 78 murine species. We identified several shifts towards smaller relative testes mass, presumably reflecting reduced sperm competition. Se… Show more

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