Figure 1.

Phylogenetic tree. Shown is a phylogenetic tree of wild boars and domestic pigs from Asia and Europe based on 50 (near) complete mitochondrial DNA (mtDNA) sequences. The tree was constructed by the neighbor-joining method with an Africa warthog as the outgroup. The numbers indicated at the nodes were bootstrap supports based on 1,000 replicates. East Asian domestic pigs and wild boars were marked by filled circles and open circles, respectively.