Fig. 4.

Phylogenetic relationships of the HA and PB1 genes of the A/AB/Kor/CN5/09 (H6N5) virus. Phylogenetic trees were constructed using the nucleotide sequences of the HA (A) and PB1 (B) genes from our isolate, along with those of selected influenza A viruses available in GenBank. The phylograms were generated by neighbor-joining (NJ) analysis with 1,000 bootstrapped replicates; the NJ percentage bootstrap values (>600) for each node are shown in each tree. The viruses characterized in this study are shown in boldface. Scale bars show 0.01 nucleotide changes per site. Abbreviations: AB, aquatic bird; AW, American wigeon; BWT, blue-winged teal; CE, common eider; EG, Egyptian goose; EM, environment; GWT, green-winged teal; MD, mallard duck; MUD, muscovy duck; NP, northern pintail; NS, northern shoveler; WB, wild bird.