Genomic variation between Chinese and European pigs. (A) Geographic locations of the original pig breeds. The Duroc (donor of the reference genome; it is denoted by a star) and Hampshire pigs were developed mainly in North America but originated in Europe. (B) Neighbor-joining phylogenetic tree, number of SNPs, transition/transversion ratio (Ts/Tv), heterozygous SNP ratio, patterns of regions of homozygosity (ROHs), and length and number of indels in the 10 breeds (left to right). Violin plots of the heterozygous SNP ratio and Ts/Tv ratio were generated using nonoverlapping 1-Mb windows (the medians are shown). For ROH, the circled area indicates the total length of ROHs in each breed. (C) Pairwise genomic similarity of Chinese and European pigs by identical score (IS) values within each 10-kb window across the genome (n = 259,511).
