Selection on an antagonistic behavioral trait can drive rapid genital coevolution in the burying beetle, Nicrophorus vespilloides.
Selection on an antagonistic behavioral trait can drive rapid genital coevolution in the burying beetle, Nicrophorus vespilloides.
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DOI：
10.1111/evo.12938
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发表时间：
2016-06
期刊：
影响因子：
--
通讯作者：
Royle NJ
中科院分区：
文献类型：
--
作者：
Hopwood PE;Head ML;Jordan EJ;Carter MJ;Davey E;Moore AJ;Royle NJ
雄性和雌性生殖器形态在许多分类群中差异很大，甚至在种群之间也是如此。解开生殖器形态选择的潜在来源是有问题的，因为每个性别的预测，以适应在其他由于生殖利益冲突。为了测试这种性冲突特征的变化与生殖器形态的变化之间的关系，我们使用了我们以前开发的人工选择系，用于高和低的重复交配率。我们选择高和低重复交配率使用一夫一妻制配对，以消除同期女性的选择和男性-男性的竞争。雄性和雌性生殖器形状对重复交配率的选择反应迅速。高交配率和低交配率品系仅经过10代的选择就与对照品系发生了分化。我们还发现了显着的模式，男性和女性的生殖器形状之间的选择制度的共同进化。我们认为，因为我们的选择线不同的性冲突，这些结果支持的假设，即性对抗的共同进化可以驱动生殖器形态的快速分歧。形态上的最大分歧对应的线，其中解决交配率的性冲突偏向于男性的利益。
Male and female genital morphology varies widely across many taxa, and even among populations. Disentangling potential sources of selection on genital morphology is problematic because each sex is predicted to respond to adaptations in the other due to reproductive conflicts of interest. To test how variation in this sexual conflict trait relates to variation in genital morphology we used our previously developed artificial selection lines for high and low repeated mating rates. We selected for high and low repeated mating rates using monogamous pairings to eliminate contemporaneous female choice and male–male competition. Male and female genital shape responded rapidly to selection on repeated mating rate. High and low mating rate lines diverged from control lines after only 10 generations of selection. We also detected significant patterns of male and female genital shape coevolution among selection regimes. We argue that because our selection lines differ in sexual conflict, these results support the hypothesis that sexually antagonistic coevolution can drive the rapid divergence of genital morphology. The greatest divergence in morphology corresponded with lines in which the resolution of sexual conflict over mating rate was biased in favor of male interests.
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