Figure 4. Phylogenetic tree of concatenated whole genome of representative global H1N1pdm viruses including four Indian viruses sequenced in this study generated by Bayesian method.

Each strain is abbreviated with virus subtype, country of origin, strain name and year of isolation in parenthesis. Scale bar indicates number of nucleotide substitutions per site. The Indian isolates sequenced in this study are highlighted in different font in clade VII. Other Indian isolates are highlighted by solid diamond in respective clades. Each clade is defined by long branch and nodes supported by high Bayesian posterior probability (BPP) values (100%).