Last-male sperm precedence breaks down when females mate with three males
Last-male sperm precedence breaks down when females mate with three males
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当雌性与三名雄性交配时，最后雄性精子的优先权被打破
DOI：
10.1098/rspb.1994.0127
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
D. W. Zeh
中科院分区：
文献类型：
--
作者：
J. A. Zeh;D. W. Zeh
许多物种的雌性通常与几个雄性交配，但我们对精子优先模式的了解几乎完全基于雌性只与两个雄性交配的实验室实验。在鸟类和昆虫中，这些调查通常显示出强烈的交配顺序效应，通常第二个交配的雄性会产生大多数后代。在丑角甲虫骑pseudocorption，单位点小卫星DNA分析最近揭示了广泛的多个父亲在野外受精的女性的育雏。在这里，我们报告的结果，精子优先实验中，我们调查了这种不寻常的交配顺序的影响。通过允许雌性只与两个雄性交配，我们能够通过实验诱导出其他两个雄性交配研究中典型的最后一个雄性精子优先的模式。相比之下，女性交配三个男性产生的育雏表现出相同的高度混合的父系检测在这个物种的性质。消除交配顺序的限制精子利用时，女性与几个男性交配表明，交配后性选择的机会可能是更大的性质比两个男性交配实验是显而易见的。
Females of many species commonly mate with several males, yet our knowledge of sperm precedence patterns is based almost exclusively on laboratory experiments in which females were mated to only two males. In both birds and insects, these investigations have generally shown strong mating order effects, usually with the second male to mate siring most of the offspring. In the harlequin beetle-riding pseudoscorpion, single-locus minisatellite DNA profiling has recently revealed extensive multiple paternity within the broods of field-inseminated females. Here, we report the findings of a sperm precedence experiment in which we investigated this unusual absence of mating order effects. By allowing females to mate with only two males, we were able experimentally to induce the pattern of strong last-male sperm precedence typical of other two-male mating studies. By contrast, females mated to three males produced broods exhibiting the same highly mixed paternity detected in this species in nature. The elimination of mating order constraints on sperm utilization when females mate with several males suggests that the opportunity for post-copulatory sexual selection may be much greater in nature than is evident from two-male mating experiments.
改进了用 M13 探测的 DNA“指纹”的杂交条件。
影响因子：
14.9
作者：
Westneat,DF;Noon,WA;Reeve,HK;Aquadro,CF
通讯作者：
Aquadro,CF