Looking for a similar partner: host plants shape mating preferences of herbivorous insects by altering their contact pheromones
Looking for a similar partner: host plants shape mating preferences of herbivorous insects by altering their contact pheromones
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DOI：
10.1111/j.1461-0248.2012.01816.x
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发表时间：
2012-09-01
期刊：
影响因子：
8.8
通讯作者：
Hilker, Monika
中科院分区：
文献类型：
--
作者：
Geiselhardt, Sven;Otte, Tobias;Hilker, Monika
表型可塑性在生态物种形成和性隔离的进化中的作用在很大程度上仍然未知。我们调查了是否分歧的寄主植物在草食性昆虫的使用导致通过表型改变参与交配识别的性状的间接交配。我们发现，男性的芥菜叶甲Phaedon cochleariae喜欢交配的女性饲养在同一植物物种的女性提供了不同的植物物种，基于不同的表皮碳氢化合物配置文件，作为接触信息素。甲虫的表皮碳氢化合物表型的寄主植物特异性和变化后2周内类似的一个新的寄主植物物种转移。我们认为，植物诱导的表型分歧的配偶识别线索可能作为一个早期的障碍，草食性昆虫种群之间的基因流的替代宿主物种，遗传分化之前，从而促进生态物种形成。
The role of phenotypical plasticity in ecological speciation and the evolution of sexual isolation remains largely unknown. We investigated whether or not divergent host plant use in an herbivorous insect causes assortative mating by phenotypically altering traits involved in mate recognition. We found that males of the mustard leaf beetle Phaedon cochleariae preferred to mate with females that were reared on the same plant species to females provided with a different plant species, based on divergent cuticular hydrocarbon profiles that serve as contact pheromones. The cuticular hydrocarbon phenotypes of the beetles were host plant specific and changed within 2 similar to weeks after a shift to a novel host plant species. We suggest that plant-induced phenotypic divergence in mate recognition cues may act as an early barrier to gene flow between herbivorous insect populations on alternative host species, preceding genetic divergence and thus, promoting ecological speciation.