Fig. 3
From: Estimates of introgression as a function of pairwise distances
The effect of time of gene-flow. For P3→P2 introgression we varied the time of gene-flow (tGF=0.1, 0.3, 0.5, 0.7 ×4N) and calculated for each statistic (D, fd and df) a the adjusted R2 ’goodness of fit’. b SSLF ’sum of squares due to lack of fit’ divided by the sample size n=100. c SSPE ’pure sum of squares error’. A window size of 5kb and a recombination rate of r=0.01 was used. The background history is: P12= 1×4N, P123= 2×4N and P123O= 3×4N generations ago. The calls to the ms program can be found in the caption of Additional file 1: Table S1.3