Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
Biology Department, Concordia University, 7141 Sherbrooke St. W., Montreal QC H4B 1R6, Canada.
Sci Adv. 2023 Sep 29;9(39):eadf5559. doi: 10.1126/sciadv.adf5559.
The processes underlying mate choice profoundly influence the dynamics of sexual selection and the evolution of male sexual traits. Consistent preference for certain phenotypes may erode genetic variation in populations through directional selection, whereas divergent preferences (e.g., genetically compatible mates) provide one mechanism to maintain such variation. However, the relative contributions of these processes across episodes of selection remain unknown. Using , we followed the fate of male genotypes, previously scored for their overall reproductive value and their compatibility with different female genotypes, across pre- and postmating episodes of selection. When pairs of competitor males differed in their intrinsic quality and their compatibility with the female, both factors influenced outcomes from mating success to paternity but to a varying degree between stages. These results add further dimensions to our understanding of how the interactions between genotypes and forms of selection shape reproductive outcomes and ultimately reproductive trait evolution.
选择配偶的过程深刻地影响着性选择的动态和雄性性特征的进化。对某些表型的一致偏好可能通过定向选择削弱群体中的遗传变异，而不同的偏好（例如，基因相容的配偶）则提供了一种维持这种变异的机制。然而，这些过程在选择过程中的相对贡献仍然未知。使用，我们跟踪了雄性基因型的命运，这些基因型先前根据其整体繁殖价值及其与不同雌性基因型的相容性进行了评分，跨越了选择的交配前和交配后的阶段。当竞争雄性在内在质量和与雌性的相容性上存在差异时，这两个因素都会影响交配成功到亲权的结果，但在不同阶段的影响程度不同。这些结果进一步加深了我们对基因型与选择形式之间的相互作用如何塑造繁殖结果并最终塑造繁殖特征进化的理解。
