Fig. 5: TreeMix analysis of R. leptorrhynchoides based on 12,965 SNPs showing the unrooted maximum likelihood tree, and the residual fit from the tree.

Drift parameter is shown on the x-axis and the scale bar shows 10 times the average standard error of the entries in the sample covariance matrix. Large, positive residuals (blue-black colours) indicate population pairs that are more closely related to each other in the data than suggested by the best-fit tree, and may be candidates for admixture events.