Fig. 4. Phylogenetic analysis of the core RdRp domain of nsp12 (aa 4503–4807 in pp1ab, Supplementary Fig. S1 available in the online Supplementary Material) for FCoV strains sequenced in this study and selected FCoV genome sequences. The phylogenetic tree was reconstructed by the neighbour-joining method from an alignment made with clustal w (MacVector). GenBank accession numbers are shown for all sequences. Bootstrap values exceeded 60 % at all nodes. Bar, nucleotide substitutions per site.