Seminal fluid protein allocation and male reproductive success.
Seminal fluid protein allocation and male reproductive success.
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DOI：
10.1016/j.cub.2009.03.036
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发表时间：
2009-05-12
期刊：
影响因子：
--
通讯作者：
Chapman T
中科院分区：
文献类型：
--
作者：
Wigby S;Sirot LK;Linklater JR;Buehner N;Calboli FC;Bretman A;Wolfner MF;Chapman T
交配后的性选择可以选择男性的精子分配策略，但男性也应该战略性地分配精液中的非精子成分，如精液蛋白(SFP)。SFP可以影响交配后性别选择的程度，但人们对SFP生产和转移中数量变化的原因或后果知之甚少。以黑腹果蝇为例，我们证明SFP被战略性地分配给雌性，以响应潜在的精子竞争水平。我们还表明，能够生产和转移大量特定SFP的男性具有显著的竞争优势。当雄性与竞争对手雄性接触时，交配时间更长，更多的两个关键SFP-性肽和卵蛋白被转移，这表明SFP的战略分配。雄性被选为较大的副腺(AGs，SFP合成的主要部位)，产生和转移明显更多的性肽，但不是更多的卵子。大型AG雄鸟的竞争性繁殖成功率也显著增加。我们的结果表明，特定SFP的数量变异可能在交配后的性别选择中发挥重要作用，对SFP生产的投资对男性在竞争环境中的健康至关重要。
Post-copulatory sexual selection can select for sperm allocation strategies in males but males should also strategically allocate non-sperm components of the ejaculate such as seminal fluid proteins (Sfps). Sfps can influence the extent of post-copulatory sexual selection but little is known of the causes or consequences of quantitative variation in Sfp production and transfer. Using Drosophila melanogaster, we demonstrate that Sfps are strategically allocated to females in response to the potential level of sperm competition. We also show that males who can produce and transfer larger quantities of specific Sfps have a significant competitive advantage. When males were exposed to a competitor male, matings were longer and more of two key Sfps, sex peptide and ovulin, were transferred, indicating strategic allocation of Sfps. Males selected for large accessory glands (AGs, a major site of Sfp synthesis) produced and transferred significantly more sex peptide, but not more ovulin. Large AG males also had significantly increased competitive reproductive success. Our results show that quantitative variation in specific Sfps is likely to play an important role in post-copulatory sexual selection and that investment in Sfp production is essential for male fitness in a competitive environment.
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DOI：
10.1073/pnas.92.22.10114
发表时间：
1995-10-24
影响因子：
11.1
作者：
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发表时间：
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影响因子：
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影响因子：
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