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. 2016 Jan 19;6:19240. doi: 10.1038/srep19240

Figure 3. Possible introgression of the VRTN haplotype from Chinese pigs into European pigs.

Figure 3

(a) Maximum likelihood (ML) phylogenic tree for the 9 kb region containing the VRTN gene. (b) ML phylogenic tree for the 200 kb region flanking (not including) the VRTN gene. Haplotypes of the two regions were first inferred, and then the two ML phylogenic trees were built for major haplotypes with frequencies of greater than 0.04 (see Methods). Q denotes the major haplotype harboring the Q allele (the mutant allele, ins), q denotes major haplotypes containing the q allele (the wild-type allele, del). EW, European wild boar; ED, European domestic pig; CW, Chinese wild boar; CD, Chinese domestic pig; anc, Beared pigs (Sus barbatus) as an outgroup to European and Chinese pigs. Scale bars represent the number of nucleotide substitutions per SNP site. Values in the tree indicate percentages (%) of observations in 1,000 bootstrap replicates.