Fig. 4

Median-joining network showing the relationships among ND2 haplotypes. Relative haplotype frequencies correspond to haplotype circle size (see Table 1). Numbers on lines connecting haplotypes indicate numbers of mutation changes. Small white circle indicates inferred haplotype. Blue circle: North population, green circle: central population, and yellow circle: south population. a, b, c and d are the different amino acids obtained from ND2 (see Fig. 2). *: haplotype linked to outgroup sequences