Analysis of Avian Hepatitis E Virus from Chickens, China
Figure 2. Phylogenetic trees based on the near-complete genomic sequences of avian hepatitis E virus (HEV) and 10 human and swine HEV isolates. GenBank accession numbers follow the name of HEV strains. The trees were constructed by the neighbor-joining method with 1,000 bootstrap replicates using Lasergene 7.0 (DNAStar, Madison, WI, USA). The length of each pair of branches represents the distance between sequence pairs; the units at the bottom of the tree indicate the number of substitution events.