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Phylogenetic trees based on the full-length S1 (A) and ORF3 (B) gene sequences of the 14 newly identified PEDV strains and reference strains, constructed by the neighbor-joining (NJ) method using MEGA 7.0 software (Kimura 2-parameter model; 1000 bootstrap replicates). Black squares and triangles represent PEDV strains from Hunan and other provinces, respectively, identified in this study
