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首页> 外文期刊>Ethology >Opposite Latitudinal Clines for First Mating and Second Mating (Remating) in Males of Drosophila melanogaster
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Opposite Latitudinal Clines for First Mating and Second Mating (Remating) in Males of Drosophila melanogaster

机译：果蝇雄性第一次交配和第二次交配（重新交配）的对立纬线

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摘要

Although female remating has been studied extensively in insects, few studies have been carried out for male remating (second mating). In this study, we analyzed Drosophila melanogaster males for their remating potential, using iso-female line culture initiated with wild flies collected from eight Indian geographic localities. We examined the association of latitude and percent melanization with first and second male mating (including mating-related traits). Our results indicated that second male mating has a negative latitudinal cline opposite to that of first mating. Body melanization is negatively correlated with second mating by male and positively with first mating (measured in terms of percent mated pairs). Mating latency during first (ML1) and second (ML2) male mating has a negative latitudinal cline, but slope values differ significantly as ML2 is great at higher latitudes as compared to ML1. The difference between ML1 and ML2 is non-significant at lower latitudes. However, copulation period of second mating (CP2) has a negative latitudinal cline, whereas copulation period of first mating (CP1) has positive latitudinal cline. Next, the latency and copulation period differ significantly between first and second male mating treatments in within-population analyses as well as in melanic strains. Furthermore, male remating ability (number of maximum successful remating attempts continuously by a male in 12h) also follows negative latitudinal cline. The lower latitudinal lighter males have more remating ability as compared to darker males from higher latitudes.
机译：尽管雌虫的交配已在昆虫中进行了广泛的研究，但对雄虫的交配（二次交配）进行的研究很少。在这项研究中，我们使用从八个印度地理区域收集的野生蝇启动的等雌系培养，分析了果蝇雄性的再繁殖潜力。我们研究了纬度和黑色素化百分比与第一和第二位男性交配（包括与交配相关的性状）之间的关系。我们的结果表明，第二雄性交配具有与第一次交配相反的纬度。身体黑化与雄性第二次交配呈负相关，而第一次交配则呈正相关（以配对对的百分比衡量）。第一次（ML1）和第二次（ML2）男性交配时的交配潜伏期为负纬度，但与ML1相比，在较高纬度上ML2较大，因此坡度值差异很大。在较低纬度下，ML1和ML2之间的差异不明显。但是，第二次交配（CP2）的交配期的纬度为负，而第一次交配（CP1）的交配期的纬度为正。接下来，在种群内分析以及黑色素菌株中，第一和第二次雄性交配处理之间的潜伏期和交配期显着不同。此外，雄性再造能力（雄性连续12h的最大成功再造尝试次数）也遵循负纬度。与纬度较高的较黑的雄性相比，纬度较低的较黑的雄性有更多的交配能力。

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