Figure 2

The evolutionary relationship among HA genes of A(H9N2) retrieved from GenBank database and sequences data in this study (MH734794 to MH734796) was inferred by using Neighbor Joining Estimation method based on the Kimura 2- parameter model derived from full gene sequence data. Values on branches are the percent of bootstrapping using 1,000 replicates. All positions containing gaps and missing data were trimmed. Evolutionary analyses were conducted in MEGA X software. The viruses of this study are indicated in black bold dot (●).