Precopulatory but not postcopulatory male reproductive traits diverge in response to mating system manipulation in Drosophila melanogaster
Precopulatory but not postcopulatory male reproductive traits diverge in response to mating system manipulation in Drosophila melanogaster
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果蝇交配前雄性生殖特征而非交配后雄性生殖特征因交配系统操纵而出现差异
DOI：
10.1002/ece3.3542
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发表时间：
2017
影响因子：
2.6
通讯作者：
Fricke C
中科院分区：
文献类型：
--
作者：
Wensing KU;Koppik M ;Fricke C
雄性之间的竞争产生了交配前和交配后性选择和冲突的可能性。理论预测，面临精子竞争风险的男性应该进化出确保生殖成功的特征。如果这些特征对女性来说代价高昂，那么这些特征的进化也可能增加两性之间的冲突。相反，在没有精子竞争的情况下，一种期望是对男性竞争性状的选择放松，从而也放松了性冲突。实验进化研究是检验这一期望的有力工具。对多个昆虫物种的研究产生了混合和部分相互矛盾的结果。在这项研究中，我们评估了雄性竞争性状和雄性对雌性交配成本的影响，在果蝇复制系进化超过50代后，无论是在强制一夫一妻制还是持续一夫多妻制下，从而操纵雄性之间的性内竞争程度。我们发现，在一个环境中，男性直接竞争与竞争对手的男性获得一个女性和她的卵子受精，一夫多妻制男性有上级生殖成功相比，一夫一妻制男性。当比较繁殖成功，仅在双交配标准精子竞争试验，但是，我们发现没有差异的男性精子防御竞争力之间的不同选择制度。相反，我们发现一夫一妻制的雄性在交配前竞争中表现较差，这表明在我们的系统中，强制一夫一妻制放松了对交配前竞争而不是交配后竞争中重要性状的选择。我们讨论我们的研究结果的背景下，从以前的实验进化研究inDrosophila ssp。和其他无脊椎动物物种。
Competition between males creates potential for pre‐ and postcopulatory sexual selection and conflict. Theory predicts that males facing risk of sperm competition should evolve traits to secure their reproductive success. If those traits are costly to females, the evolution of such traits may also increase conflict between the sexes. Conversely, under the absence of sperm competition, one expectation is for selection on male competitive traits to relax thereby also relaxing sexual conflict. Experimental evolution studies are a powerful tool to test this expectation. Studies in multiple insect species have yielded mixed and partially conflicting results. In this study, we evaluated male competitive traits and male effects on female costs of mating inDrosophila melanogasterafter replicate lines evolved for more than 50 generations either under enforced monogamy or sustained polygamy, thus manipulating the extent of intrasexual competition between males. We found that in a setting where males competed directly with a rival male for access to a female and fertilization of her ova polygamous males had superior reproductive success compared to monogamous males. When comparing reproductive success solely in double mating standard sperm competition assays, however, we found no difference in male sperm defense competitiveness between the different selection regimes. Instead, we found monogamous males to be inferior in precopulatory competition, which indicates that in our system, enforced monogamy relaxed selection on traits important in precopulatory rather than postcopulatory competition. We discuss our findings in the context of findings from previous experimental evolution studies inDrosophila ssp. and other invertebrate species.
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DOI：
10.1098/rspb.2013.2873
发表时间：
2014-04-22
影响因子：
4.7
作者：
Hollis, Brian;Kawecki, Tadeusz J.
通讯作者：
Kawecki, Tadeusz J.
果蝇种群中操作性性别比实验性改变的适应
DOI：
--
发表时间：
2008
期刊：
Evolution; international journal of organic evolution
影响因子：
--
作者：
M. Reuter;Jon R. Linklater;L. Lehmann;Kevin Fowler;T. Chapman;G. Hurst
通讯作者：
G. Hurst
半克隆分析揭示了果蝇精子大小的显着遗传、环境和基因型×环境影响
影响因子：
2.1
作者：
Edward H. Morrow;A. Leijon;A. Meerupati
通讯作者：
A. Meerupati
有效种群规模对实验性选择模式作用的检验和回顾
影响因子：
8.8
作者：
R. Snook;Lena Brüstle;J. Slate
通讯作者：
J. Slate
球螨Rhizoglyphus Robini在轻松的性冲突下的进化
DOI：
--
发表时间：
2006
期刊：
Evolution; international journal of organic evolution
影响因子：
--
作者：
Magdalena Tilszer;Kinga Antoszczyk;Natalia Sałek;E. Zając;J. Radwan
通讯作者：
J. Radwan