Sexually Antagonistic Selection, Sexual Dimorphism, and the Resolution of Intralocus Sexual Conflict
Sexually Antagonistic Selection, Sexual Dimorphism, and the Resolution of Intralocus Sexual Conflict
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DOI：
10.1086/595841
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发表时间：
2009-02-01
影响因子：
2.9
通讯作者：
Calsbeek, Ryan
中科院分区：
文献类型：
--
作者：
Cox, Robert M.;Calsbeek, Ryan
男性和女性共享大部分基因组，并表达许多相同的特征，但性别往往有显着不同的选择最佳这些共同的特征。这种性对抗（SA）选择产生了基因座内的性冲突，这种冲突被认为是通过性二形性的进化来解决的。然而，我们目前对SA选择的流行程度、产生性对抗的健身成分或性二型性与当前SA选择之间的关系知之甚少。我们回顾了已发表的研究，以解决这些问题，使用424个选择估计代表89个性状，从34个物种。男性和女性往往有很大的不同，在方向和幅度的选择共享的特征，虽然统计上显着的SA选择是相对罕见的。性选择产生更强的性对抗比繁殖力或生存能力的选择，这些个体的健身组件往往会相互加强，产生更强的性对抗净健身。表现出强性二态性的性状比弱二态性的性状表现出更大的SA选择，尽管在我们控制了物种内嵌套的多个性状后，这种模式并不显着。我们的研究结果表明，尽管性二型性的进化，内位点的性冲突往往可能会持续下去。
Males and females share most of their genomes and express many of the same traits, yet the sexes often have markedly different selective optima for these shared traits. This sexually antagonistic (SA) selection generates intralocus sexual conflict that is thought to be resolved through the evolution of sexual dimorphism. However, we currently know little about the prevalence of SA selection, the components of fitness that generate sexual antagonism, or the relationship between sexual dimorphism and current SA selection. We reviewed published studies to address these questions, using 424 selection estimates representing 89 traits from 34 species. Males and females often differed substantially in the direction and magnitude of selection on shared traits, although statistically significant SA selection was relatively uncommon. Sexual selection generated stronger sexual antagonism than fecundity or viability selection, and these individual components of fitness tended to reinforce one another to generate even stronger sexual antagonism for net fitness. Traits exhibiting strong sexual dimorphism exhibited greater SA selection than did weakly dimorphic traits, although this pattern was not significant after we controlled for the inclusion of multiple traits nested within species. Our results suggest that intralocus sexual conflict often may persist despite the evolution of sexual dimorphism.