How conflict shapes evolution in poeciliid fishes
How conflict shapes evolution in poeciliid fishes
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DOI：
10.1038/s41467-019-11307-5
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发表时间：
2019-07-26
影响因子：
16.6
通讯作者：
Reznick, David N.
中科院分区：
文献类型：
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作者：
Furness, Andrew I.;Pollux, Bart J. A.;Reznick, David N.
在有生命的动物谱系中，胎盘的进化被预测为怀孕期间的基因组冲突创造一个竞技场，驱动雄性性选择的模式，并增加物种形成的速度。在这里，我们在活体Poecilid鱼类中测试了胎生驱动冲突假说（VDCH）的这些预测，该鱼类显示出多个独立的胎座起源和雄性性选择特征的极端变化。正如预测的那样，男性性选择的特征只在缺乏胎盘的谱系中获得;而男性特征对胎盘的进化几乎没有影响。这两个结果是一致的模式，女性供应管理男性属性的演变。此外，与较高的物种形成率相关的是雄性性选择特征（交配前）的存在，而不是胎盘形成（交配后）。这些结果突出了女性生殖模式，男性性选择和物种形成率之间的因果关系，这表明在塑造生物体生物学的各个方面的冲突的作用。
In live-bearing animal lineages, the evolution of the placenta is predicted to create an arena for genomic conflict during pregnancy, drive patterns of male sexual selection, and increase the rate of speciation. Here we test these predictions of the viviparity driven conflict hypothesis (VDCH) in live-bearing poecilid fishes, a group showing multiple independent origins of placentation and extreme variation in male sexually selected traits. As predicted, male sexually selected traits are only gained in lineages that lack placentas; while there is little or no influence of male traits on the evolution of placentas. Both results are consistent with the mode of female provisioning governing the evolution of male attributes. Moreover, it is the presence of male sexually selected traits (pre-copulatory), rather than placentation (post-copulatory), that are associated with higher rates of speciation. These results highlight a causal interaction between female reproductive mode, male sexual selection and the rate of speciation, suggesting a role for conflict in shaping diverse aspects of organismal biology.