Experimental evolution under varying sex ratio and nutrient availability modulates male mating success in Drosophila melanogaster.

Experimental evolution under varying sex ratio and nutrient availability modulates male mating success in Drosophila melanogaster.
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DOI:
10.1098/rsbl.2021.0652
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发表时间:
2022-06
期刊:
影响因子:
3.3
通讯作者:
--
中科院分区:
生物学2区
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--
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有偏见的人口性别比可以改变最佳的男性交配策略,并分配到生殖性状取决于营养供应。然而,很少有资料表明,营养与性别比例的相互作用,以影响交配前和交配后性状的进化分别。为了解决这一问题,我们测试如何在不同的性别比例和成年饮食的黑腹果蝇雄性交配成功和生殖投资的演变,使用实验进化。我们发现,性别比例和养分供应相互作用,以确定男性交配前的表现。来自雌性偏好群体的雄性在蛋白质限制下进化时,交配速度较慢。相比之下,我们发现直接和非交互作用的性别比例和营养物质的供应后交配成功。在蛋白质限制下进化的雄性在抑制雌性再交配方面相对较差。相对于来自男性偏好或女性偏好群体的男性,在平等的性别比例下进化的男性生育更多的后代,并且更好地抑制女性再次交配。这些结果支持性比和营养相互作用决定交配前交配性状的进化,但独立影响交配后性状的进化的观点。
Biased population sex ratios can alter optimal male mating strategies, and allocation to reproductive traits depends on nutrient availability. However, there is little information on how nutrition interacts with sex ratio to influence the evolution of pre-copulatory and post-copulatory traits separately. To address this omission, we test how male mating success and reproductive investment evolve under varying sex ratios and adult diet in Drosophila melanogaster, using experimental evolution. We found that sex ratio and nutrient availability interacted to determine male pre-copulatory performance. Males from female-biased populations were slow to mate when they evolved under protein restriction. By contrast, we found direct and non-interacting effects of sex ratio and nutrient availability on post-copulatory success. Males that evolved under protein restriction were relatively poor at suppressing female remating. Males that evolved under equal sex ratios fathered more offspring and were better at supressing female remating, relative to males from male-biased or female-biased populations. These results support the idea that sex ratios and nutrition interact to determine the evolution of pre-copulatory mating traits, but independently influence the evolution of post-copulatory traits.
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