Fig. 2

Phylogenetic analysis of the VP4 gene of G8 rotavirus strains used in the phylogenetic study of RVA strains. Phylogenetic tree of VP4 gene. This tree involves five different VP4 genes including P[8], P[4], P[6], P[14] and P[9]. Studied strains were marked in different shapes and colors. : sample strains; : G8P[8] strains in various regions; : animal-derived strains; : strains in mainland China. All sequences except those of the sample strains were obtained from the NCBI public database. The Kimura-2 parameter model was used for the construction of the Neighbor-Joining phylogenetic tree. Bootstrap numbers are shown at the branch nodes and are more reliable at values of > 70%. The scale bar indicates nucleotide substitutions per site