Sex-ratio distorter of Drosophila simulans reduces male productivity and sperm competition ability
Sex-ratio distorter of Drosophila simulans reduces male productivity and sperm competition ability
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DOI：
10.1111/j.1420-9101.2004.00737.x
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发表时间：
2004-07-01
影响因子：
2.1
通讯作者：
Montchamp-Moreau, C
中科院分区：
文献类型：
--
作者：
Atlan, A;Joly, D;Montchamp-Moreau, C
本研究的目的是确定性别比分离扭曲的影响，男性果蝇simulans的生育能力可以解释这些X连锁减数分裂驱动程序在不同种群的物种的对比成功。我们比较了性比和野生型男性在不同交配条件下的生育力。这两种类型被发现是同样肥沃时，交配是允许的，每两个女性男性，在整个产卵期间。相比之下，性别比例的男性在有限的时间内或在精子竞争条件下被提供多个配偶时，会遭受强烈的生育劣势。只有在后一种情况下，男性生育率的损失超过了扭曲者的隔离优势。这些结果表明，性别比例失真可以传播或从人群中消失，这取决于交配率。因此，人口密度预计将发挥重要作用的性别比例扭曲在这果蝇物种的进化。
The aim of the present study was to determine whether the effects of sex-ratio segregation distorters on the fertility of male Drosophila simulans can explain the contrasting success of these X-linked meiotic drivers in different populations of the species. We compared the fertility of sex-ratio and wild-type males under different mating conditions. Both types were found to be equally fertile when mating was allowed, with two females per male, during the whole period of egg laying. By contrast sex-ratio males suffered a strong fertility disadvantage when they were offered multiple mates for a limited time, or in sperm competition conditions. In the latter case only, the toll on male fertility exceeded the segregation advantage of the distorters. These results indicate that sex-ratio distorters can either spread or disappear from populations, depending on the mating rate. Population density is therefore expected to play a major role in the evolution of sex-ratio distorters in this Drosophila species.