Fig. 4

Phylogenetic analysis of the VP4 gene of RVB. A phylogenetic tree based on the nucleotide sequence of VP4 gene was constructed using the maximum likelihood method with 1,000 bootstrap replicates. Bootstrap values greater than 70% are shown on the interior branch nodes, and scale bars indicate the number of substitutions per site. A black circle represents the detected RVB strains in this study. The genotype of the detected RVB strain is indicated in red