Split sex ratios and queen-male conflict over sperm allocation
Split sex ratios and queen-male conflict over sperm allocation
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DOI：
10.1098/rspb.1996.0104
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发表时间：
1996-06-22
影响因子：
4.7
通讯作者：
Boomsma, JJ
中科院分区：
文献类型：
--
作者：
Boomsma, JJ
在具有单女王殖民地的真社会性Hyattera种群中，不育工人由于可变的女王交配频率而实现分裂的性别比例，这些工人的父母之间的殖民地水平的性别比例存在极端冲突。由于后来的性别比例的后果，女王的选择，以尽量减少相关性不对称的女儿工人的性，而男性的选择，以最大限度地提高工人的相关性不对称。在早期的女王交配行为的选择力的分析，本文探讨了两个具体的适应男性影响精子分配，以最大限度地提高女性后代之间的相关性不对称：精子凝集和减少精子转移。这些雄性交配特征与蚁后的利益相悖，因此两性之间的进化军备竞赛是可以预料的。一系列可测试的预测精子凝集，男性信息素和变化的亲子关系的分布。在一个双交配女王殖民地的父系均匀性预计将增加女王交配频率的增加，这是相反的，在非社会昆虫精子位移观察到的趋势。它的结论是，最好的选择，在高度真社会性的昆虫父系操纵可能发生在交配过程中，在第一个工人的后代。
In populations of eusocial Hymenoptera with single-queen colonies, where sterile workers realize split sex ratios due to variable queen mating frequency, there is an extreme conflict over the colony-level sex ratio between the parents of these workers. Because of the later sex ratio consequences, queens are under selection to minimize the relatedness asymmetry of daughter workers to sexuals, whereas males are under selection to maximize worker relatedness asymmetry. After an earlier analysis of selection forces on queen mating behaviour, this paper explores two specific adaptations for males to influence the allocation of sperm to maximize relatedness asymmetry among female offspring: sperm clumping and reduced sperm transfer. These male mating traits are against the interests of queens, so that evolutionary arms races between the sexes are expected. A series of testable predictions on sperm clumping, male pheromones and variation in paternity distributions is given. Evenness in paternity in colonies with a double-mated queen is predicted to increase as queen mating frequency increases, which is opposite to the observed trend in non-social insects with sperm displacement. It is concluded that the best options for paternal manipulation in highly eusocial insects may occur during the mating process, before the first worker offspring are around.