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- W2101333682 startingPage "20150429" @default.
- W2101333682 abstract "The evolutionary maintenance of same-sex sexual behaviour (SSB) has received increasing attention because it is perceived to be an evolutionary paradox. The genetic basis of SSB is almost wholly unknown in non-human animals, though this is key to understanding its persistence. Recent theoretical work has yielded broadly applicable predictions centred on two genetic models for SSB: overdominance and sexual antagonism. Using Drosophila melanogaster , we assayed natural genetic variation for male SSB and empirically tested predictions about the mode of inheritance and fitness consequences of alleles influencing its expression. We screened 50 inbred lines derived from a wild population for male–male courtship and copulation behaviour, and examined crosses between the lines for evidence of overdominance and antagonistic fecundity selection. Consistent variation among lines revealed heritable genetic variation for SSB, but the nature of the genetic variation was complex. Phenotypic and fitness variation was consistent with expectations under overdominance, although predictions of the sexual antagonism model were also supported. We found an unexpected and strong paternal effect on the expression of SSB, suggesting possible Y-linkage of the trait. Our results inform evolutionary genetic mechanisms that might maintain low but persistently observed levels of male SSB in D. melanogaster , but highlight a need for broader taxonomic representation in studies of its evolutionary causes." @default.
- W2101333682 created "2016-06-24" @default.
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- W2101333682 creator A5042269189 @default.
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- W2101333682 date "2015-06-22" @default.
- W2101333682 modified "2023-10-06" @default.
- W2101333682 title "A test of genetic models for the evolutionary maintenance of same-sex sexual behaviour" @default.
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- W2101333682 doi "https://doi.org/10.1098/rspb.2015.0429" @default.
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