Sex-specific evolutionary potential of pre- and postcopulatory reproductive interactions in the field cricket, Teleogryllus commodus

Mate choice often depends on the properties of both sexes, such as the preference and responsiveness of the female and the sexual display traits of the male. Quantitative genetic studies, however, traditionally explore the outcome of an interaction between males and females based solely on the genotype of one sex, treating the other sex as a source of environmental variance. Here we use a half-sib breeding design in the field cricket, Teleogryllus commodus, to estimate the additive genetic contribution of both partners to three steps of the mate choice process: the time taken to mate; the duration of spermatophore attachment; and, the intensity of mate guarding. Rather than each sex contributing equally to the interactions, we found that genetic variation for latency to mate and spermatophore attachment was sex-specific, and in the case of mate guarding intensity, largely absent. For a given interaction, genetic variation in one sex also appears to be largely independent of the other, a...配偶选择通常取决于两性的各自特征，例如雌性的择偶偏好与响应性，以及雄性的性展示性状。然而，传统数量遗传学研究往往仅基于单一性别的基因型来探究雌雄个体间的互动结果，并将另一性别视为环境方差的来源。本研究以双斑蟋（Teleogryllus commodus）为实验对象，采用半同胞育种设计，估算了配偶双方对配偶选择过程三个阶段的加性遗传贡献：交配潜伏期、精荚附着时长以及配偶守护强度。研究发现，并非两性对互动的贡献均等：交配潜伏期与精荚附着时长的遗传变异具有性别特异性，而配偶守护强度的遗传变异则基本不存在。在特定的互动组合中，某一性别的遗传变异似乎也在很大程度上独立于另一性别，……