Linkage of butterfly mate preference and wing color preference cue at the genomic location of wingless
Linkage of butterfly mate preference and wing color preference cue at the genomic location of wingless
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DOI：
10.1073/pnas.0509685103
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发表时间：
2006-04-25
影响因子：
11.1
通讯作者：
Gilbert, LE
中科院分区：
文献类型：
--
作者：
Kronforst, MR;Young, LG;Gilbert, LE
性隔离是动物物种形成早期阶段生殖隔离的一种重要形式，但人们对年轻物种不同的择偶偏好和偏好线索的遗传基础知之甚少。赫利康蝴蝶以其翅膀颜色图案的多样性而闻名，由于雄性对翅膀图案的偏好不同，它们的交配方式也不同。在这里，我们发现雄性Heliconius cydno和Heliconius pachinus用于识别同种雌性的特定线索是翅膀上斑块的颜色。此外，雄性交配偏好在杂交种中与前翅颜色分离，表明负责偏好和偏好线索的基因座之间存在遗传关联。数量性状基因座作图将偏好基因座与决定前翅颜色的基因座重合，前翅颜色本身与翅膀图案候选基因无翅完美关联。此外，多态性种族 H. cydno alithea 的黄色雄性更喜欢向黄色雌性求爱，这表明翅膀颜色和颜色偏好是由位于倒位的基因座控制的，或者是单个基因座的多效性效应。偏好和偏好线索之间的紧密遗传关联虽然很少见，但使得分歧和物种形成特别有可能，因为自然选择和性选择对一种性状的影响会转移到另一种性状上，从而导致配偶识别的协调进化。这种连锁对分歧的影响在Heliconius中尤其重要，因为该属中翅膀颜色图案的分化是由缪勒拟态的自然选择驱动和维持的。
Sexual isolation is a critical form of reproductive isolation in the early stages of animal speciation, yet little is known about the genetic basis of divergent mate preferences and preference cues in young species. Heliconius butterflies, well known for their diversity of wing color patterns, mate assortatively as a result of divergence in male preference for wing patterns. Here we show that the specific cue used by Heliconius cydno and Heliconius pachinus males to recognize conspecific females is the color of patches on the wings. in addition, male mate preference segregates with forewing color in hybrids, indicating a genetic association between the loci responsible for preference and preference cue. Quantitative trait locus mapping places a preference locus coincident with the locus that determines forewing color, which itself is perfectly linked to the wing patterning candidate gene, wingless. Furthermore, yellow-colored males of the polymorphic race H. cydno alithea prefer to court yellow females, indicating that wing color and color preference are controlled by loci that are located in an inversion or are pleiotropic effects of a single locus. Tight genetic associations between preference and preference cue, although rare, make divergence and speciation particularly likely because the effects of natural and sexual selection on one trait are transferred to the other, leading to the coordinated evolution of mate recognition. This effect of linkage on divergence is especially important in Heliconius because differentiation of wing color patterns in the genus has been driven and maintained by natural selection for Mullerian mimicry.