An invasive social insect overcomes genetic load at the sex locus

文献类型： 外文期刊

第一作者： Gloag, Rosalyn

作者： Gloag, Rosalyn;Ding, Guiling;Christie, Joshua R.;Buchmann, Gabriele;Beekman, Madeleine;Oldroyd, Benjamin P.;Ding, Guiling

作者机构：

期刊名称：NATURE ECOLOGY & EVOLUTION （ 影响因子：15.46； 五年影响因子：15.974 ）

ISSN： 2397-334X

年卷期： 2017 年 1 卷 1 期

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收录情况： SCI

摘要： Some invasive hymenopteran social insects found new populations with very few reproductive individuals. This is despite the high cost of founder effects for such insects, which generally require heterozygosity at a single locus-the complementary sex determiner, csd-to develop as females. Individuals that are homozygous at csd develop as either infertile or subfertile diploid males or not at all. Furthermore, diploid males replace the female workers that are essential for colony function. Here we document how the Asian honey bee (Apis cerana) overcame the diploid male problem during its invasion of Australia. Natural selection prevented the loss of rare csd alleles due to genetic drift and corrected the skew in allele frequencies caused by founder effects to restore high average heterozygosity. Thus, balancing selection can alleviate the genetic load at csd imposed by severe bottlenecks, and so facilitate invasiveness.

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