Females benefit from mating with different males in the scorpionfly Panorpa cognata
Females benefit from mating with different males in the scorpionfly Panorpa cognata
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DOI：
10.1093/beheco/arj046
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发表时间：
2006-05
影响因子：
2.4
通讯作者：
L. Engqvist
中科院分区：
文献类型：
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作者：
L. Engqvist
女性一夫多妻制的适应意义已成为近年来理论和实证研究的一个反复出现的话题。有人争辩说，除了直接的好处，如结婚礼物或充足的精子供应，女性可能从与不同的男性交配中获得遗传好处。全蝎的雌性在其一生中与几只雄性交配。在一项旨在排除多次交配带来的任何直接营养益处的实验中，我发现，与两只不同雄性交配的一夫多妻制雌性比与同一雄性交配两次的一夫多妻制雌性的孵化成功率要高得多。然而，不同的雄性在不同的雌性身上引发的反应并不相同，因为不同的雌性与同一雄性交配的卵孵化成功并不相关。因此，结果与假设一夫多妻制的遗传利益受到男性内在遗传质量影响的假设不符。然而，结果与遗传不亲和性假说是一致的。然而，交配过程中来自不同雄性的物质可能会协同影响受精卵的存活率。此外，我还讨论了为什么亲子关系研究只能在先验地期望男女基因组相容的情况下才能明确地检验遗传不相容假说。版权所有2006年。
The adaptive significance of female polyandry has become a recurrent subject of recent theoretical and empirical research. It has been argued that in addition to direct benefits, such as nuptial gifts or an adequate sperm supply, females may gain genetic benefits from mating with different males. Females of the scorpionfly Panorpa cognata mate with several males during their lifetime. In an experiment designed to rule out any direct nutritional benefit of multiple matings, I found that polyandrous females that mated with two different males achieved a significantly higher egg-hatching success than monandrous females that mated twice with the same male. However, individual males did not trigger the same response in different females as the egg-hatching success of different females that mated with one and same male did not correlate. The results, thus, do not conform to predictions from hypotheses assuming that genetic benefits of polyandry are influenced by the intrinsic genetic quality of males. The results are, however, consistent with the genetic incompatibility hypothesis. Nevertheless, substances from different males transferred during copulation may synergistically affect zygote viability. Furthermore, I discuss why paternity studies can only explicitly test the genetic incompatibility hypothesis if there are a priori expectations of female-male genome compatibilities. Copyright 2006.