Evolutionary Dynamics and Emergence of Panzootic H5N1 Influenza Viruses
The NP (A), PA (B) and PB2 (C) gene trees scaled to time (horizontal axis) generated using the SRD06 codon model and uncorrelated relaxed clock model. Nodes correspond to mean TMRCAs and blue horizontal bars at nodes represent the 95% HPDs of TMRCAs. Red branches indicate Gs/GD lineage H5N1 viruses. Identical phylogenetic trees with virus names are shown in Figure S2. TMRCAs and HPDs for each of the major H5N1 genotype internal genes are given in Table 3.