Genetics of a pheromonal difference affecting sexual isolation between Drosophila mauritiana and D. sechellia.
Genetics of a pheromonal difference affecting sexual isolation between Drosophila mauritiana and D. sechellia.
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影响 Drosophila mauritiana 和 D. sechellia 之间性隔离的信息素差异的遗传学。
DOI：
10.1093/genetics/145.4.1015
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发表时间：
1997
期刊：
影响因子：
3.3
通讯作者：
Charlesworth,B
中科院分区：
文献类型：
--
作者：
Coyne,JA;Charlesworth,B
雌性果蝇是果蝇的近缘种。毛壳动物的角质层碳氢化合物不同：主要的化合物Ind。Sechelaria is 7，11-二十七碳二烯(7，11-HD)，而Ind.毛刺三烯(7-T)。我们调查了这种差异的遗传基础及其在物种间生殖隔离中的作用。涉及碳氢化合物转移的行为研究表明，这些化合物在D之间的性别隔离中发挥了很大作用。Mauritianamales和D.而正反交中的性隔离更多地是由雌性行为的差异造成的，而不是碳氢化合物。碳氢化合物分布的这种种间差异是由于至少6个基因座的进化变化造成的，这些基因座都在第三条染色体上。进化变化定位在第三条染色体上，这在对雌性碳氢化合物差异的所有其他遗传分析中都可以看到。黑素胃组。我们认为，在两个物种中看到的高7，11-HD表型独立于具有高7-T表型的祖先而进化了两次，并且反复出现的第三染色体效应是进化上的汇聚，这可能是由于该染色体上集中了“烃基因”。
Females of the sibling speciesDrosophila sechelliaandD. mauritianadiffer in their cuticular hydrocarbons: the predominant compound inD. sechelliais 7,11-heptacosadiene (7,11-HD), while that inD. mauritianais 7-tricosene (7-T). We investigate the genetic basis of this difference and its involvement in reproductive isolation between the species. Behavioral studies involving hydrocarbon transfer suggest that these compounds play a large role in the sexual isolation betweenD. mauritianamales andD. sechelliafemales, while sexual isolation in the reciprocal hybridization results more from differences in female behavior than hydrocarbons. This interspecific difference in hydrocarbon profile is due to evolutionary change at a minimum of six loci, all on the third chromosome. The localization of evolutionary change to the third chromosome has been seen in every other genetic analysis of female hydrocarbon differences in theD. melanogastergroup. We suggest that the high 7,11-HD phenotype seen in two species evolved twice independently from ancestors having the high 7-T phenotype, and that the recurrent third-chromosome effects are evolutionary convergences that may be due to a concentration of “hydrocarbon genes” on that chromosome.