Positive selection and the molecular evolution of a gene of male reproduction, Acp26Aa of Drosophila |
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Authors: | Tsaur SC; Wu CI |
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Institution: | Department of Ecology and Evolution, University of Chicago, IIIinois 60637, USA. |
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Abstract: | The gene for a male ejaculatory protein, Acp26Aa, in four sibling species
of the Drosophila melanogaster subgroup has previously been shown to have a
nonsynonymous rate (Ka) of nucleotide substitution that is
indistinguishable from the synonymous rate (Ks). By examining this gene in
two other species of this subgroup, we found that Ka is generally large and
can sometimes be more than twice as large as Ks. This suggests that
positive selection may be operating at this locus of male reproduction.
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