Investigating the Genetic Evolution of PCV2 and PCV3 across Six Swine Herds in China from 2020 to 2021

Figure 1

Phylogenetic analysis based on ORF2 sequences of PCV2. (a) Samples from Heilongjiang (first), (b) Heilongjiang (second), (c) Henan, (d) Hebei, (e) Xinjiang Uygur autonomous region, and (f) Hubei herds. Different colors indicate different genotypes. Blue: PCV2a; green: PCV2b; red: PCV2d. The tree was constructed by the maximum likelihood method with bootstrap values calculated for 1,000 replicates.

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