Fig. 3

Bombina orientalis population differentiation analysis based on microsatellite data. Genetic clustering using STRUCTURE of (a) all samples and of (b) samples from Beijing only. The vertical lines are broken into different colors showing the proportion of each individual assigned to each of the inferred clusters. Letters at the top of the figure correspond to sampling locations. K, number of genetic clusters. Discriminant analysis of principle components plots of the genetic structure based on individual genotypes among samples from (c) all sampling sites and from (d) sites in Beijing. Dots represent individuals and inertia ellipses indicate defined groups by color. The top insets in each graph indicate the cumulative variance explained by retained PCA eigenvalues and the bottom insets represent linear discriminant analysis (DA) eigenvalues of the first few principal components. See Fig. 1 for sampling site information