Fig. 2

a Neighbor-joining phenogram based on pairwise comparisons of average nucleotide differences. Abbreviations for localities are the same as those provided in Table 1. Group 1 (pink), Group 2 (blue), Group 3 (brown), Newfoundland (Grey). b Haplotype network with numbers corresponding to haplotypes described in Table 1. Cross marks represent single mutations, and the dark dot represents an unknown haplotype