Figure 2. Phylogenetic analysis of the nucleotide sequences of the vp7 gene of G9 strain isolated in Wuhan and G9 strains from different parts of the world. The bar indicates the variation scale. A phylogenetic tree was generated based on the neighbor-joining method using MEGA version 3.1 (www.megasoftware.net). GenBank accession numbers of the vp7 gene sequences of group A rotavirus are the following: AY211068,AY196119,AY695811,DQ490173,AY307085,DQ096291,DQ990317,DQ056296, AY487877, AJ491163, AF438228, DQ321497, DQ321495, AJ250542, AJ250543, AJ491188, AF060487, AJ250544, AY866505, AY816184, AB091777, AB091756, AB176682, L79916, and EF197983.