These are Jukes-Cantor distances based on number of mtDNA sequence differences. [See Glossary and pp. 91-93 of Hall, B.G. 2001. Phylogenetic Trees Made Easy. Sinauer, for more on evolutionary models ...

Comparisons are usually made pairwise with reference to a third genome 'outgroup' or by examination of pairs of paired sequences and summarized in phylogenetic trees. A pangenome of wild and ...