Fig. 6.

Calculation of long-range frequencies. For a sliding window with a fixed number of SNPs, a red cell flanked by green cells utilized equal numbers of single-SNP frequencies (allele frequency or heterozygosity of each SNP) on both sides of the red cell, whereas a red cell flanked by yellow cells utilized unequal numbers of single-SNP frequencies on the two sides of the red cell towards the two ends of the chromosome. For sliding windows with fixed chromosome distance, a red cell flanked by green cells utilized single-SNP frequencies in half the window size on both sides of the red cell whereas a red cell flanked by yellow cells utilized single-SNP frequencies of unequal chromosome distances on the two sides of the red cell towards the two ends of the chromosome