Fig. 1

The phylogenetic analysis based on the cap genes of PCV2. Phylogenetic trees were constructed with the MEGA 7.0.14 software using the neighbor-joining (NJ) method, with the Jukes-cantor model as a nucleotide substitution model. The reliability of the generated trees was determined with 1000 replicates of the data set. Thirty-two isolates and six reference sequences were analyzed