Genome-wide distribution of haplotype blocks for the entire panel and two groups in the association mapping panel.

<p><b>(A)</b> The heatmap above indicates LD distribution. The color density represents the average <i>r</i>² values of all SNP pairs in a sliding-window of 500 kb. The map below indicates the distribution of haplotype blocks with length > 100 kb. The gray color represents the background and the blue color indicates the haplotype blocks. <b>(B)</b> The distributions of different types of haplotype blocks for the P1 and P2 groups across each chromosome. Gray rectangles represent genomic regions that don’t contain any haplotype block. Red rectangles represent the P1-specific haplotype blocks and blue rectangles represent the P2-specific haplotype blocks. Orchid rectangles represent the common haplotype blocks with frequency difference ≤0.4, and black rectangles represent the group-preferential haplotype blocks with frequency difference >0.4.