1. FIG. 2.— Phylogenetic tree and divergence time estimates for mtDNA sequences of Przewalski's and domestic horses. The results of analysis carried out in BEAST. Based on a fossil record, we assumed that Somali wild ass and domestic horse diverged 2.0 Ma (Forstén 1992). Numbers below nodes are posterior probabilities, and bold numbers above nodes are the estimated divergence times. The 95% highest posterior density estimates for each clade are represented by bars.
From: A Massively Parallel Sequencing Approach Uncovers Ancient Origins and High Genetic Variability of Endangered Przewalski's Horses
Genome Biol Evol. 2011;3: doi: /gbe/evr067
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