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The rooted phylogenetic tree of 38 field strains homolog and other representative S gene constructed by the neighbour‐joining method within the Mega 6.0 software. Bootstrap majority consensus values on 1000 replicates are indicated at each branch point in per cent. Black solid circles indicate the 38 porcine epidemic diarrhoea virus strains isolated in this study. Bootstrap values are represented at key nodes. Scale bar represents nucleotide substitutions per site.
