Fig. 1From: Detection and phylogenetic analyses of spike genes in porcine epidemic diarrhea virus strains circulating in China in 2016–2017Phylogenetic analysis using the S genes of 74 PEDV reference strains and the 11 PEDV isolates in our study. The tree was constructed using the neighbor-joining method, with bootstrap values calculated from 1000 replicates using MEGA 6 software. “●” indicates the isolates in our studyBack to article page