Genetic mechanisms and correlational selection structure trait variation in a coral snake mimic.
Genetic mechanisms and correlational selection structure trait variation in a coral snake mimic.
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珊瑚蛇拟态体的遗传机制和相关选择结构性状变异。
DOI：
10.1098/rspb.2021.0003
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Cox,ChristianL
中科院分区：
文献类型：
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作者：
Curlis,JohnDavid;DavisRabosky,AlisonR;Holmes,IrisA;Renney,TimothyJ;Cox,ChristianL
性状之间的共变塑造了表型进化和跨空间和时间的生态相互作用。然而，这种相关性的强度和方向的巨大地理差异可能特别难以通过广义机制来解释。通过整合种群基因组学、自然历史收藏调查和空间明确分析，我们测试了珊瑚蛇拟态性状相关性的多个驱动因素，该拟态珊瑚蛇在拟态和非拟态颜色特征方面表现出显着的多态性。我们发现，尽管这些特征在空间中广泛共存，但相关性最好通过遗传结构和相关选择的混合来解释，而不是通过任何单一机制。我们的研究结果表明，空间复杂的性状分布可能更多地是由多个过程之间的简单相互作用驱动的，而不是单独由一种机制的复杂变化驱动的。这些相互作用在拟态系统中尤其重要，它经常在颜色图案特征之间产生显着的地理变异和遗传相关性。
Covariation among traits shapes both phenotypic evolution and ecological interactions across space and time. However, rampant geographical variation in the strength and direction of such correlations can be particularly difficult to explain through generalized mechanisms. By integrating population genomics, surveys of natural history collections and spatially explicit analyses, we tested multiple drivers of trait correlations in a coral snake mimic that exhibits remarkable polymorphism in mimetic and non-mimetic colour traits. We found that although such traits co-occur extensively across space, correlations were best explained by a mixture of genetic architecture and correlational selection, rather than by any single mechanism. Our findings suggest that spatially complex trait distributions may be driven more by the simple interaction between multiple processes than by complex variation in one mechanism alone. These interactions are particularly important in mimicry systems, which frequently generate striking geographical variation and genetic correlations among colour pattern traits.