FIG 1.

ML tree of 149 sequences of the G gene ectodomain of BEFV representing the known global genetic diversity in this virus. The geographic locations of the different viral lineages are marked, clearly showing the common ancestry of the Australian viruses (Fig. 2 provides a more detailed analysis of the Australian viruses). Bootstrap values are shown for key nodes, and all horizontal branch lengths are drawn according to a scale of nucleotide substitutions per site. The tree is midpoint rooted for purposes of clarity only.