Ward Heather K E, Moehring Amanda J
Western University, London, ON N6A 5B7, Canada.
Genome. 2021 Feb;64(2):87-95. doi: 10.1139/gen-2019-0224. Epub 2020 Nov 19.
Surface chemical compounds are key components of survival and reproduction in many species. Cuticular hydrocarbons (CHCs) are chemical compounds produced by all insects that are used for both desiccation resistance and chemical communication, including communication related to mating. In the species pair of and , female CHCs stimulate conspecific males to mate and repel heterospecific males. While CHCs are a critical contributor to both reproductive success within a species and isolation between species, few genes underlying species variation in CHC profiles are known. Here, we use genetic mapping of the 3rd chromosome to test a suite of candidate genes for interspecies variation in CHCs. Candidate gene was found to be involved in species differences in the production of 7,11-heptacosadiene and 7-tricosene between and . This is therefore a new candidate locus contributing to species-specific variation in the CHC profile. In the process of mapping genes for CHCs, we also identified 29 candidate genes for the reduced survival or inviability of interspecies hybrids.
表面化合物是许多物种生存和繁殖的关键组成部分。表皮碳氢化合物（CHCs）是所有昆虫产生的化合物，用于抗干燥和化学通讯，包括与交配相关的通讯。在[具体物种对]中，雌性CHCs刺激同种雄性交配并排斥异种雄性。虽然CHCs对物种内的繁殖成功和物种间的隔离都起着关键作用，但很少有基因参与CHC谱的物种变异。在这里，我们利用第三条染色体的遗传图谱来测试一组CHCs种间变异的候选基因。发现候选基因[具体基因]参与了[具体物种对]之间7,11 - 二十七碳二烯和7 - 二十三碳烯产生的物种差异。因此，这是一个导致CHC谱物种特异性变异的新候选基因座。在绘制CHC基因的过程中，我们还鉴定出29个导致种间杂种存活率降低或无法存活的候选基因。
