Fig. 6.

The haplotypes at the TBX19 locus in Chinese domestic pigs was possibly introgressed from an extinct Sus species. (A) The maximum-likelihood (ML) tree for representative haplotypes at the TBX19 locus in pigs and four other Sus species. This tree was built for eight haplotypes of 70 kb each one representing one population using 1,000 times of bootstraps. Scale bars represent the number of nucleotide substitutions per SNP site. (B) Average number of nucleotide differences per site between populations. dxy values are highlighted with different density colors, where darker colors correspond to larger values. SCL, S. celebensis; CNDP, Chinese domestic pigs; EDP, European domestic pigs. Other abbreviations of European and Chinese domestic pig breeds and wild boars are same as in the legend of figures 1 and 4.