On the Origin of Species by Natural and Sexual Selection
On the Origin of Species by Natural and Sexual Selection
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DOI：
10.1126/science.1181661
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发表时间：
2009-12-18
期刊：
影响因子：
56.9
通讯作者：
Weissing, Franz J.
中科院分区：
文献类型：
--
作者：
van Doorn, G. Sander;Edelaar, Pim;Weissing, Franz J.
生态物种形成被认为是对当地适应选择的适应性反应。然而，除了合适的生态条件外，这一过程还需要选择性交配，以保护新生物种免受基因流的同质化。通过一个简单的模型，我们证明了破坏性的生态选择有利于进化的装饰品，信号本地适应性的性偏好。这样的偏好会诱导生态性状的选择性交配，并增强破坏性选择的强度。因此，自然选择和性选择协同工作，以实现当地的适应和生殖隔离，即使在大量的基因流动的存在。由此产生的物种形成过程没有交配偏好的分歧，避免了困扰以前的性选择物种形成模型的问题。
Ecological speciation is considered an adaptive response to selection for local adaptation. However, besides suitable ecological conditions, the process requires assortative mating to protect the nascent species from homogenization by gene flow. By means of a simple model, we demonstrate that disruptive ecological selection favors the evolution of sexual preferences for ornaments that signal local adaptation. Such preferences induce assortative mating with respect to ecological characters and enhance the strength of disruptive selection. Natural and sexual selection thus work in concert to achieve local adaptation and reproductive isolation, even in the presence of substantial gene flow. The resulting speciation process ensues without the divergence of mating preferences, avoiding problems that have plagued previous models of speciation by sexual selection.