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Mean pairwise divergence (Dxy) along each major chromosomal arm between species of the D. melanogaster complex. The following species pairs are shown: D. mauritiana–D. simulans (yellow), D. sechellia–D. simulans (orange), D. mauritiana–D. sechellia (green), D. simulans–D. melanogaster (gray), and D. mauritiana–D. melanogaster (red). The sliding window analysis was performed using a window size of 500 kb and a step size of 100 kb; chromosomal coordinates are those of D. mauritiana.
