Figure 2.

Phylogenetic trees based on the ORF2 gene of PCV2 and the complete coding sequences (ORF1 + ORF2) of PCV3. The ML tree was constructed with a p-distance model and bootstrapping at 1,000 replicates. (A): PCV2. (B): PCV3. The PCV3 subtypes were proposed by Li et al. (28). The strains sequenced in this study are marked with circles; the Chinese reference sequences are marked with triangle; the vaccine strains are marked with square. The different genotypes are represented by different colors as indicated in the figures.