Fig. 2. Phylogenetic tree based on P[1] (A) and P[5] (B) VP4 complete nucleotide sequences. Sequence alignments and clustering were performed with ClustalW in MEGA 7.0 software. The tree was constructed using the maximum likelihood method, with bootstrap values calculated for 1000 replicates. ▴ represents the VP4 gene dairy calf BoRVA strains from this study (GenBank no. MN937507-MN937514; GenBank no. MN937515-MN937516); ∘ represents the VP4 gene of one yak P[1] BoRVA strain; • represents the VP4 gene of BoRVA strains in China.
