Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40064-016-3194-1/MediaObjects/40064_2016_3194_Fig3_HTML.gif)
Phylogenetic trees based on the VP1 coding sequences (876 bp) of E-30 generated by the neighbor-joining algorithm implemented in MEGA (version 6.1) using the Kimura two-parameter substitution model and 1000 bootstrap pseudo-replicates. Only strong bootstrap values (>75 %) are shown. Filled triangle strains isolated in this investigation. Filled circle China