Extended Data Fig. 4: Genetic differentiation between populations.
From: Experimental evolution of adaptive divergence under varying degrees of gene flow
PCA including all populations per genetic background. The analysis was conducted including all genetic variants (upper graphs) or using only variants present at the beginning of the experiment (standing genetic variation; lower graphs). Decomposition of genetic variation across all populations using principal component analyses shows a similar distribution of populations for the genetic backgrounds across the different levels of gene flow for the first two principal components. Using all genetic variants, the two major axes of variation explained in total 17.3 % and 20.1 % of the genetic variation for the α and β background, respectively. This increased to 27.7 and 25.9% when using only standing genetic variation, however, the distribution of populations remained similar.
