Maximum clade credibility tree from Bayesian molecular clock analysis of the CU and GU strains.

<p>The maximum clade credibility tree was generated using TreeAnnotator and visualized using FigTree v1.4.2. Values above the branches indicate posterior probability values in percentage. The blue bars indicate the 95% highest probability density of the inferred node ages. The posterior probability and 95% highest probability density were obtained from four independent runs of 10,000,000 iterations. The values on the time line indicate age in million years before present calculated using a mutation rate of 4.5 × 10⁻⁹ per site per year.