Fig. 3From: The taxonomy, host range and pathogenicity of coronaviruses and other viruses in the Nidovirales orderThe maximum likelihood tree of coronaviruses based on amino acid sequences of RdRp gene. The tree was constructed using an IQ-tree with 10,000 ultrafast bootstraps and the most appropriate substitution model of LG+F+I+G4, which was calculated by ModelFinderBack to article page