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The phylogenetic tree based on partial spike gene of Chinese PEDV sequences along with reference sequences. PEDV is evolved into two genogroups including G1 and G2. G1 and G2 are each further divided into two subgroups including G1a, G1b, G2a and G2b. Novel clades for G2a and G2b were defined as clades 1 to 6 [Colour figure can be viewed at http://wileyonlinelibrary.com]
