Overlap of outlier regions among SNP datasets in genome-wide scans for positive selection. For all SNP datasets we performed sliding-window analyses (100 kb window, 25 kb step size) of the absolute allele-frequency differential (D) between the SK and WA population. All windows with an average window D > 0.95 were considered as outliers, i.e. candidate regions for selective sweeps. Percentage values are given in relation to the total number of outlier windows.