Figure 2
From: The species coalescent indicates possible bat and pangolin origins of the COVID-19 pandemic
Consensus species tree of human, bat, and pangolin coronaviruses resolves the different histories of 11 gene trees in the coronavirus genome and was constructed by two methods (see Materials and Methods) from 5,248 viral genomes. (a) Using a distance based neighbor-joining method (Materials and Methods), the 5000 + taxa are represented in a circular consensus species tree. The outer circle designates regions. Each of the regions (Africa, Americas, Asia, Europe, and Oceania) in the consensus species tree have 80% of their viral genomes identified from that region or 80% bootstrap support and at least 50 viral genomes. (b) A blowup of the pangolin and bat coronavirus clades. Red dots indicate bootstrap support of at least 70%.
