Fig. 3.

Phylogenetic trees of the deduced amino acid sequences of a portion of VP1 of genogroup 3 samples. Reference strains are identified by name and GenBank accession number. The evolutionary history was inferred using the neighbor-joining method. The optimal tree with the sum of branch length = 0.13646711 is shown. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The evolutionary distances were computed using the Poisson correction method and are in the units of the number of amino acid substitutions per site. The analysis involved 45 amino acid sequences. All positions containing gaps and missing data were eliminated. There were a total of 116 positions in the final dataset