Fig. 2: Molecular dating of the 614 Y. pestis strains from Madagascar.

a Maximum clade credibility tree rooted on Y. pestis CO92. Each subgroup is collapsed and colored with the same colors as in Fig. 1. b Representation of the median of the most recent common ancestors of each subgroup (excluding the five subgroups containing only one strain) with their 95% highest posterior density as error bars (source data are presented in Supplementary Data 6-7) colored with the color of the corresponding subgroup.