Population tree of control Borrelia species and strains from SCW-30 group. Fast and slow evolving plasmid and chromosome located genes and non-coding region were included into the analysis. Bayesian concordance analysis was conducted using BUCKy  with a value of 1.0 for α, the parameter that summarizes prior expectations of the amount of concordance among gene trees. Each split is annotated with the posterior mean sample-wide concordance factor and its 95% credibility interval. The concordance factor shows the proportion of the sample trees for which the split is true, ranging from 0.0-1.0. Branch lengths are in coalescence units.