Chenoweth Stephen F, Blows Mark W
School of Integrative Biology, University of Queensland, St. Lucia 4072, Queensland, Australia.
Am Nat. 2005 Feb;165(2):281-9. doi: 10.1086/427271. Epub 2004 Dec 28.
The nature of male mating preferences, and how they differ from female mating preferences in species with conventional sex roles, has received little attention in sexual selection studies. We estimated the form and strength of sexual selection as a consequence of male and female mating preferences in a laboratory-based population of Drosophila serrata. The differences between sexual selection on male and female signal traits (cuticular hydrocarbons [CHCs]) were evaluated within a formal framework of linear and nonlinear selection gradients. Females tended to exert linear sexual selection on male CHCs, whereas males preferred intermediate female CHC phenotypes leading to convex (stabilizing) selection gradients. Possible mechanisms determining the nonlinear nature of sexual selection on female CHCs are proposed.
在性选择研究中，雄性交配偏好的本质以及它们与具有传统性别角色的物种中雌性交配偏好的差异很少受到关注。我们在基于实验室的锯谷盗果蝇种群中，估计了由于雄性和雌性交配偏好导致的性选择的形式和强度。在线性和非线性选择梯度的正式框架内，评估了雄性和雌性信号特征（表皮碳氢化合物[CHCs]）的性选择差异。雌性倾向于对雄性CHCs施加线性性选择，而雄性则偏好中等的雌性CHC表型，从而导致凸形（稳定）选择梯度。我们提出了决定雌性CHCs性选择非线性本质的可能机制。
