Ponkshe Aditya, Endler John A
Centre for Integrative Ecology School of Life & Environmental Sciences Deakin University Waurn Ponds Vic. Australia.
Ecol Evol. 2018 Apr 10;8(9):4518-4524. doi: 10.1002/ece3.3957. eCollection 2018 May.
Recent developments in sexual selection theory suggest that on their own, mate preferences can promote the maintenance of sexual trait diversity. However, how mate preferences constrain the permissiveness of sexual trait diversity in different environmental regimes remains an open question. Here, we examine how a range of mate choice parameters affect the permissiveness of sexual trait polymorphism under several selection regimes. We use the null model of sexual selection and show that environments with strong assortative mating significantly increase the permissiveness of sexual trait polymorphism. We show that for a given change in mate choice parameters, the permissiveness of polymorphism changes more in environments with strong natural selection on sexual traits than in environments with weak selection. Sets of nearly stable polymorphic populations with weak assortative mating are more likely to show accidental divergence in sexual traits than sets of populations with strong assortative mating. The permissiveness of sexual trait polymorphism critically depends upon particular combinations of natural selection and mate choice parameters.
性选择理论的最新进展表明，仅就配偶偏好本身而言，其能够促进性状多样性的维持。然而，配偶偏好在不同环境条件下如何限制性状多样性的允许范围仍是一个悬而未决的问题。在此，我们研究了一系列配偶选择参数如何在几种选择条件下影响性状多态性的允许范围。我们使用性选择的零模型，结果表明，具有强烈选型交配的环境会显著增加性状多态性的允许范围。我们发现，对于配偶选择参数的给定变化，在对性状有强烈自然选择的环境中，多态性的允许范围变化比在弱选择环境中更大。与具有强烈选型交配的种群相比，具有弱选型交配的近稳定多态种群更有可能在性状上出现偶然分化。性状多态性的允许范围关键取决于自然选择和配偶选择参数的特定组合。
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