Figure 2. The mitochondrial clade distribution of 49 uninfected isofemale lines (“a” dataset) from North Eurasian field collections made in 1978–1992 [9].

This distribution was inferred using the 37C/T diagnostic substitution (37C, the S-clade; 37T, the M-clade). Boxed geographical names were confirmed by sequencing; numbers after names stand for the number of lines corresponding to a particular location.