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有读书笔记Female extrapair mating behavior can evolve via indirect selection on males

唐唐 添加于 2011-6-16 05:49 | 3014 次阅读 | 0 个评论
  •  作 者

    Forstmeier W, Martin K, Bolund E, Schielzeth H, Kempenaers B
  •  摘 要

    In many species that form socially monogamous pair bonds, a considerable proportion of the offspring is sired by extrapairmales. This observation has remained a puzzle for evolutionary biologists: although mating outside the pair bond can obviouslyincrease the offspring production of males, the benefits of such behavior to females are less clear, yet females are knownto actively solicit extrapair copulations. For more than two decades adaptionist explanations have dominated the discussions,yet remain controversial, and genetic constraint arguments have been dismissed without much consideration. An intriguing butstill untested hypothesis states that extrapair mating behavior by females may be affected by the same genetic variants (alleles)as extrapair mating behavior by males, such that the female behavior could evolve through indirect selection on the male behavior.Here we show that in the socially monogamous zebra finch, individual differences in extrapair mating behavior have a hereditarycomponent. Intriguingly, this genetic basis is shared between the sexes, as shown by a strong genetic correlation betweenmale and female measurements of extrapair mating behavior. Hence, positive selection on males to sire extrapair young willlead to increased extrapair mating by females as a correlated evolutionary response. This behavior leads to a fundamentallydifferent view of female extrapair mating: it may exist even if females obtain no net benefit from it, simply because thecorresponding alleles were positively selected in the male ancestors.
  •  详细资料

    • 文献种类: Journal Article
    • 期刊名称: Proceedings of the National Academy of Sciences
    • 期刊缩写: Proceedings of the National Academy of Sciences
    • ISBN: 0027-8424
  • 学科领域 人文社科 » 心理学

  • 相关链接 DOI URL 

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