diversity observed (0.005 and 0.001). Haplotype diversity (Table 3 was also similar for all samples (range 0.795-1) except Minnesota and Wisconsin (0.583 and 0.5), The samples that formed the northern group in hierarchical analysis were characterized by having lower nucleotide diversity and lower haplotype diversity when compared to the southern group. Tcs generated a 95% parsimony haplotype network for the 60 haplotypes (Fig. 2). The network contains many loops,