Sexual isolation between North American and Bogota strains of Drosophila pseudoobscura.
Sexual isolation between North American and Bogota strains of Drosophila pseudoobscura.
复制标题
北美和波哥大果蝇品系之间的性隔离。
DOI：
10.1007/s10519-011-9517-7
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发表时间：
2012
影响因子：
2.6
通讯作者：
Anderson,WyattW
中科院分区：
文献类型：
--
作者：
Kim,Yong-Kyu;Ruiz-Garcia,Manuel;Alvarez,Diana;Phillips,DennisR;Anderson,WyattW
性隔离，即不同物种生物成功交配的能力降低，是阻止不同类群之间基因流动的生殖障碍之一。求爱期间的各种物种特异性信号归因于它们之间的性隔离。假暗果蝇已被广泛用于研究性隔离选择背后的行为和遗传机制，作为物种形成的模型系统。 pseudoobscuraand its sibling species,D. persmilis 在许多地方共同生活，但彼此生殖隔离。 North American geographic strains ofD.来自美国西部的pseudoobscura随机交配。几十年前，D.伪暗虫（pseudoobscuras）采集于哥伦比亚波哥大附近，后来将该亚种命名为D.波哥大伪暗影。这项研究观察到近 5,000 次交配。我们分析了北美和波哥大D. 品系内部和之间的交配行为和表皮碳氢化合物分布以及求偶行为。伪暗斑。在此，我们首次报道了 D. 波哥大菌株。伪暗色表现出与北美菌株的统计显着的性隔离。此外，波哥大品系和北美品系之间的角质层碳氢化合物和求偶行为存在数量差异，北美品系和波哥大品系的雌性都对具有高交配倾向的北美品系雄性表现出强烈的偏好，这表明波哥大品系处于早期阶段，可能会形成一个单独的物种。
Sexual isolation, the reduced ability of organisms of different species to successfully mate, is one of the reproductive barriers that prevent gene flow between different taxa. Various species-specific signals during courtship are attributed to the sexual isolation between them.Drosophila pseudoobscurahas been widely used to study the behavioral and genetic mechanisms underlying selection for sexual isolation, as a model system for speciation.D. pseudoobscuraand its sibling species,D. persmilis, live together in many locations but are reproductively isolated from one another. North American geographic strains ofD. pseudoobscurafrom the American West mate at random. Several decades ago,D. pseudoobscurawas collected in the vicinity of Bogota, Colombia, and later named the subspeciesD. pseudoobscura bogotana. Nearly 5,000 matings were observed in this study. We analyzed mating behavior and cuticular hydrocarbon profiles as well as courtship within and between North American and Bogota strains ofD. pseudoobscura. Here we report for the first time that Bogota strains ofD. pseudoobscurado show statistically significant sexual isolation from North American strains. In addition, there are quantitative variations in cuticular hydrocarbons as well as in courtship behavior between Bogota and North American strains, and females of both North American and Bogota strains show strong preference for North American strain males having high mating propensities, suggesting that the Bogota strains are at an early stage that could lead to a separate species.