Fig 3. Phylogenetic analysis of group C viruses based on partial nucleotide sequences of the M segment.

The phylogenetic tree was constructed using the neighbor-joining method. Bootstrap values were obtained based on 1000 replicates using the partial coding sequence of the polyprotein. The evolutionary distances were computed using the Kimura 2-parameter method. Members of the Simbu, California and Bunyamwera serogroups were used as outgroups to root the tree.