Figure 6

Core set tree compared to SP tree. We considered the 26 haplotypes of groups 2 and 3 in Fig. 4a. TCS had complicated loops in the tree (Fig. 6b). Removal of the branches marked with asterisks and changing the dotted line into a solid line gave our result (Fig. 6a), which was also uniquely reproduced by PAUP*. The occurrence of loops could be explained by parallel changes. The bold lines in Fig. 6a denote parallel changes of six pairs and one triplet.