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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Sexual isolation between two sibling species of Drosophila: D. ananassae and D. pallidosa
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Sexual isolation between two sibling species of Drosophila: D. ananassae and D. pallidosa

机译：果蝇的两个同胞物种之间的性隔离：凤梨果蝇和苍白果蝇

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摘要

Sexual isolation, a form of premating reproductive barriers, is one of the elementary causes of speciation. In the present study, investigations on sexual isolation between two sympatric sibling species, namely Drosophila ananassae and D. pallidosa have been undertaken by employing four different choice conditions (multi-ple-, female-, male- and no-choice). Mating success was scored by direct observation in Elens–Wattiaux mating chamber. In all the four choice conditions, homogamic matings were morefrequent than heterogamic ones, which indicates preferential mating between males and females of the same species. The values of isolation estimate in all the four techniques are close to zero, suggesting the presence of strong sexual isolation betweenthese two sibling species.
机译：性隔离是繁殖障碍的一种形式，是物种形成的基本原因之一。在本研究中，已经通过采用四种不同的选择条件（多选，雌选，雄选和无选）对两个同胞同胞种（果蝇D. pallidosa）之间的性隔离进行了调查。通过在Elens-Wattiaux交配室中的直接观察来评估交配成功。在所有四个选择条件下，同系交配比异系交配更为频繁，这表明相同物种的雄性和雌性之间优先交配。所有这四种技术的隔离估计值都接近于零，表明这两个兄弟姐妹物种之间存在强烈的性隔离。

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