據(jù)“中央社”6月14日報道，美國高球名將老虎伍茲(Tiger Woods)顯然生來就有超多的運動細胞,，但伍茲背著妻子大搞婚外情,，是否也是出自天性呢？根據(jù)新出爐的研究,，搞外遇可能是基因在作怪,。
報道引述最新研究報告稱，科學家表示,，根據(jù)基因分析,，縱欲的雄性動物往往會生相同癖性的雌性后代，這個論點可能也適用于人類,。
德國麥克斯普蘭喀研究所鳥類學家佛斯特麥爾,，觀察上下共5代，超過1500只圈養(yǎng)斑胸草雀,，交配及求偶的炫耀行為,。
斑胸草雀是一夫一妻制的物種，終其一生都會和元配在一塊,，不過部分的斑胸草雀有時候會“出軌”,。
研究結(jié)果顯示，基因變異會助長雄性動物的縱欲行為,，可能也同樣會讓雌性動物變得更加花心,。
研究報告刊登在《國家科學院院刊》（PNAS）上。（生物谷Bioon.com）
生物谷推薦原文出處：
Proceedings of the National Academy of Sciences DOI： 10.1073/pnas.1103195108
Female extrapair mating behavior can evolve via indirect selection on males
Forstmeier, Wolfgang; Martin, Katrin; Bolund, Elisabeth; Schielzeth, Holger; Kempenaers, Bart
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.
