The relationship between intraspecific assortative mating and reproductive isolation between divergent populations

作     者：Daniel I. BOLNICK Mark KIRKPATRICK 

作者机构：Howard Hughes Medical Institute and Section of Integrative Biology One University Station C0930 University of Texas at Austin Austin TX 78712 USA Section of Integrative Biology One University Station C0930 University of Texas at Austin Austin TX 78712 USA 

出 版 物：《Current Zoology》 (动物学报（英文版）)

年 卷 期：2012年第58卷第3期

页      面：484-492页

核心收录：

学科分类：07[理学] 09[农学] 0904[农学-植物保护] 0713[理学-生态学] 

基　　金：supported by a Fellowship from the David and Lucille Packard Foundation to D. Bolnick 美国国家科学基金 

主　　题：Assortative mating Hybridization Mating preference Reproductive isolation Speciation 

摘      要：The term ＇assortative mating＇ has been applied to describe two very different phenomena： （1） the tendency for indi- viduals to choose phenotypically similar mates from among conspecifics; or （2） the tendency to prefer conspecific over hete- rospecific mates （behavioral reproductive isolation）. Both forms of assortative mating are widespread in nature, but the relation- ship between these behaviors remains unclear. Namely, it is plausible that a preference for phenotypically similar conspecifics in cidentally reduces the probability of mating with phenotypically divergent heterospecifics. We present a model to calculate how the level of reproductive isolation depends on intraspecific assortative mating and the phenotypic divergence between species. For empirically reasonable levels of intraspecific assortment on a single trait axis, we show that strong reproductive isolation requires very substantial phenotypic divergence. We illustrate this point by applying our model to empirical data from threespine stickleback Gasterosteus aculeatus and Darwin＇s Finches （Geospiza spp）. We conclude that typical levels of intraspecific assortment cannot generally be extrapolated to explain levels of interspecific reproductive isolation. Instead, reproductive isolation between species likely arises from different mate choice behaviors, or multivariate assortative mating [Current Zoology 58 （3）： 484-492, 2012].