Figure 4.

The phylogenetic trees were constructed based on the BPIV-3 nucleotide sequences. Using nucleotide sequences retrieved from 40 BPIV-3 strains in GenBank and 3 isolated strains, phylogenetic trees for BPIV-3 whole genome, HN, P, and N, were established. Isolates from this study were denoted in red font. (a) Whole-genome phylogenetic tree. (b) N gene phylogenetic tree. (c) P gene phylogenetic tree. (d) HN gene phylogenetic tree. (e) M gene phylogenetic tree. The evolutionary trees were constructed using the neighbor-joining method and tested with the bootstrap method. The numbers on the branches represent the percentage of 1000 bootstrap replications supporting each phylogenetic branch.