Cryptic Sex-Ratio Bias Provides Indirect Genetic Benefits Despite Sexual Conflict
Cryptic Sex-Ratio Bias Provides Indirect Genetic Benefits Despite Sexual Conflict
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DOI：
10.1126/science.1185550
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发表时间：
2010-04-02
期刊：
影响因子：
56.9
通讯作者：
Calsbeek, Ryan
中科院分区：
文献类型：
--
作者：
Cox, Robert M.;Calsbeek, Ryan
当选择有利于两性异形时，高适应性的父母往往会产生低适应性的异性后代。这种性冲突被认为压倒了择偶的遗传优势，因为偏好的男性通过生产低健康的女儿而产生成本。我们提供了一个在蜥蜴（Anolis sagrei），表现出对身体大小的性冲突的对应点。通过配偶选择实验，我们发现，女性棕色anoles产生更多的儿子比女儿通过大的父亲，但更多的女儿比儿子通过小的父亲。在野外的后代健身措施表明，最大的健身收益可以通过将后代生产从女儿到儿子的父系大小增加。这些结果说明了性冲突的解决如何恢复择偶的遗传益处。
When selection favors sexual dimorphism, high-fitness parents often produce low-fitness progeny of the opposite sex. This sexual conflict is thought to overwhelm the genetic benefits of mate choice because preferred males incur a cost through the production of low-fitness daughters. We provide a counterpoint in a lizard (Anolis sagrei) that exhibits sexual conflict over body size. By using mate-choice experiments, we show that female brown anoles produce more sons than daughters via large sires but more daughters than sons via small sires. Measures of progeny fitness in the wild suggest that maximal fitness payoffs can be achieved by shifting offspring production from daughters to sons as sire size increases. These results illustrate how the resolution of sexual conflict can restore the genetic benefits of mate choice.