Additive genetic and environmental variation interact to shape the dynamics of seasonal migration in a wild bird population.
Additive genetic and environmental variation interact to shape the dynamics of seasonal migration in a wild bird population.
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加性遗传和环境变异相互作用，塑造野生鸟类季节性迁徙的动态。
DOI：
10.1093/evolut/qpad111
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Acker P
中科院分区：
文献类型：
--
作者：
Acker P
剖析微观进化和可塑性对环境扰动的联合反应需要量化关键性状表达背后的遗传和环境变异的相互作用成分。对于表型离散性状来说，这一目标尤其具有挑战性，因为需要多尺度分解来揭示潜在遗传和环境变异到表型变异的非线性转化，并且必须从不完整的现场观察中估计影响。我们设计了一个联合多状态捕获-重新捕获和定量遗传动物模型，并将该模型与部分迁徙的欧洲鸬鹚的全年度周期重新观测数据进行拟合，以估计季节性迁徙与居住的生态关键离散性状中遗传、环境和表型变异的关键组成部分。我们证明了迁移潜在责任中不可忽略的加性遗传方差，导致在两次强生存选择之后出现可检测的微进化反应。此外，责任规模的加性遗传效应与大量永久性个体和临时环境效应相互作用，对表达的表型产生复杂的非加性效应，导致表型规模上显着的内在基因与环境相互作用差异。因此，我们的分析揭示了部分季节性迁徙的时间动态如何由瞬时微进化和个体内表型一致性的组合产生，并强调内在表型可塑性如何将离散性状背后的遗传变异暴露给复杂形式的选择。
Dissecting joint micro-evolutionary and plastic responses to environmental perturbations requires quantifying interacting components of genetic and environmental variation underlying expression of key traits. This ambition is particularly challenging for phenotypically discrete traits where multiscale decompositions are required to reveal nonlinear transformations of underlying genetic and environmental variation into phenotypic variation, and when effects must be estimated from incomplete field observations. We devised a joint multistate capture–recapture and quantitative genetic animal model, and fitted this model to full-annual-cycle resighting data from partially-migratory European shags () to estimate key components of genetic, environmental and phenotypic variance in the ecologically critical discrete trait of seasonal migration versus residence. We demonstrate non-negligible additive genetic variance in latent liability for migration, resulting in detectable micro-evolutionary responses following two episodes of strong survival selection. Further, liability-scale additive genetic effects interacted with substantial permanent individual and temporary environmental effects to generate complex nonadditive effects on expressed phenotypes, causing substantial intrinsic gene-by-environment interaction variance on the phenotypic scale. Our analyses therefore reveal how temporal dynamics of partial seasonal migration arise from combinations of instantaneous micro-evolution and within-individual phenotypic consistency, and highlight how intrinsic phenotypic plasticity could expose genetic variation underlying discrete traits to complex forms of selection.