Data from: Sex-biased genetic component distribution among populations: additive genetic and maternal contributions to phenotypic differences among populations of Chinook salmon

An approach frequently used to demonstrate a genetic basis to population-level phenotypic differences is to employ common garden rearing designs, where observed differences are assumed to be attributable to primarily additive genetic effects. Here, in two common garden experiments, we employed factorial breeding designs between wild and domestic, and among wild populations of Chinook salmon (Oncorhynchus tshawytscha). We measured the contribution of additive (VA) and maternal (VM) effects to the observed population differences for 17 life history and fitness-related traits. Our results show that, in general, maternal effects contribute more to phenotypic differences among populations than additive genetic effects. These results suggest that maternal effects are important in population phenotypic differentiation, and also signify that the inclusion of the maternal source of variation is critical when employing models to test population differences in salmon, such as in local adaptation studies.用于证明种群水平表型差异具有遗传基础的常用方法，是采用同质园饲养实验设计（common garden rearing design），该设计假设观测到的差异主要归因于加性遗传效应（additive genetic effects）。本研究开展两项同质园饲养实验，针对奇努克鲑（Oncorhynchus tshawytscha）的野生种群间以及野生与驯养种群间，采用析因育种设计进行实验。我们针对17个生活史性状与适合度相关性状，量化了加性遗传效应（VA）与母体效应（VM）对观测到的种群差异的贡献程度。研究结果显示，总体而言，母体效应对种群间表型差异的贡献程度高于加性遗传效应。上述结果表明，母体效应在种群表型分化过程中发挥着重要作用，同时也提示，在利用模型检验鲑鱼种群差异（例如本地适应研究）时，纳入变异的母体来源是至关重要的。