Multiple mechanisms of cryptic female choice act on intraspecific male variation in Drosophila simulans
Multiple mechanisms of cryptic female choice act on intraspecific male variation in Drosophila simulans
复制标题
DOI：
10.1007/s00265-016-2069-3
复制
发表时间：
2016-04-01
影响因子：
2.3
通讯作者：
Manier, Mollie K.
中科院分区：
文献类型：
--
作者：
Ala-Honkola, Outi;Manier, Mollie K.
交配后的性选择可以在雌性与多个雄性交配时出现，通常由两性之间的相互作用介导。隐性雌性选择（CFC）是交配后性选择的一种形式，当雌性形态、生理或行为在受精成功方面产生偏差时发生。然而，它在非随机生殖成功的重要性是解决不好，由于挑战区分女性和男性的作用，在产生模式的受精偏见。尽管如此，最近有两个CFC机制已被记录和特点的背景下，配子分离的竞争性杂交与毛里求斯果蝇的果蝇：精子喷射和非随机使用精子存储器官受精。在这里，我们探讨如果以及如何女性D。模拟果蝇利用CFC的这两种机制来响应种内雄性大小的变化。我们使用转基因雄性表达绿色（GFP）或红色荧光蛋白（RFP）的精子头部文件交配后的过程中，结合概率分析模型。我们意外地发现，差异生殖成功也是男性人口（GFP或RFP）的功能，这表明女性使用不同的CFC机制来选择不同的男性性状。此外，在precopulatory（交配潜伏期测量）和postcopulatory阶段的选择一致性取决于男性性状和CFC机制的研究。较大的男性在交配前后都更成功，但我们意外地发现，女性也更快地与GFP标记的精子的男性交配，而受精偏见有利于RFP标记的精子。
Postcopulatory sexual selection can arise when females mate with multiple males and is usually mediated by an interaction between the sexes. Cryptic female choice (CFC) is one form of postcopulatory sexual selection that occurs when female morphology, physiology, or behavior generates a bias in fertilization success. However, its importance in nonrandom reproductive success is poorly resolved due to challenges distinguishing the roles of females and males in generating patterns of fertilization bias. Nevertheless, two CFC mechanisms have recently been documented and characterized in Drosophila simulans within the context of gametic isolation in competitive hybrid matings with Drosophila mauritiana: sperm ejection and nonrandom use of sperm storage organs for fertilization. Here, we explore if and how female D. simulans employ these two mechanisms of CFC in response to intraspecific male size variation. We used transgenic males expressing green (GFP) or red fluorescent protein (RFP) in sperm heads to document postcopulatory processes, in conjunction with a probabilistic analytical model. We unexpectedly found that differential reproductive success was also a function of male population (GFP or RFP), suggesting that females use different CFC mechanisms to select for different male traits. Moreover, concordance of selection at the precopulatory (as measured by mating latency) and postcopulatory stages depends on both the male trait and the CFC mechanism examined. Larger males were more successful both before and after mating, but we unexpectedly found that females also mated more quickly with males with GFP-labeled sperm, while fertilization bias favored RFP-labeled sperm.