Fig. 3

Phylogenetic analyses of the nucleotide sequences of flaviviruses. Phylogenetic trees constructed based on the complete genome sequences (a) and the NS5 gene (b). The evolutionary history was inferred using the neighbor-joining method. The optimal tree is shown. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (1000 replicates) are shown next to the branches. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The evolutionary distances were computed using the maximum composite likelihood method and are in units of the number of base substitutions per site. The rate variation among sites was modeled with a gamma distribution (shape parameter = 1). Evolutionary analyses were conducted in MEGA 11. Guizhou isolates identified in this study are labeled with red shading