Fig. 2From: Prevalence and phylogenetic analysis of porcine diarrhea associated viruses in southern China from 2012 to 2018Phylogenetic analysis on the animo acid sequences of the S1 protein of selected PEDV (a) and PDCoV (b) strains from different countries. Solid black circle indicates the strains determined in this study. The tree was constructed using the neighbor-joining method (bootstrap resampling = 1000 replications) in the MEGA software package, version 7.0Back to article page