Figure 2
From: Old divergences in a boreal bird supports long-term survival through the Ice Ages
Mitochondrial cytochrome b gene tree. Dated gene tree for all cytochrome b sequences (including identical haplotypes), estimated by Bayesian inference using the GTR + Γ model, a fixed clock rate of 0.0105 per lineage/million years and a coalescent expansion growth model. Values in square brackets are 95% highest posterior density intervals for the node ages. Support values are given above the nodes (>0.5/50%) in the order, from left to right, posterior probability, maximum likelihood bootstrap (1000 replicates) and parsimony bootstrap (1000 replicates); support for minor clades within the three main clades are not indicated, except for a clade comprising samples from northeast Siberia and Alaska (marked by an asterisk). Clades discussed in the text are indicated by A, B and C.