Figure 5 in Phylogenetic structure among pocket gopher populations, genus Thomomys (Rodentia: Geomyidae), on the Baja California Peninsula

Figure 5. Population expansion of Thomomys on the Baja California Peninsula (BCP). A, haplotype network of 119 haplotypes based on a fragment of cyt b (499 bp). The network shows three main clades that are also found by phylogenetic analyses. Each dot across the line between haplotypes represents a single base substitution. Dashed lines indicate the genetic break and the mutational steps between ancestral haplotypes. The numbers in the boxes indicate one of 119 unique haplotypes (Table 1); subscript numbers indicate the number of times the haplotype was sampled. B, mismatch distributions, based on the frequency of pairwise differences between all haplotypes. The grey line represents the expected Poisson distribution assuming a stepwise population expansion. The observed distribution is indicated by the black line.