Figure 1
From: Current situation of H9N2 subtype avian influenza in China
Genotypic diversity of H9N2 subtype avian influenza viruses in China during 1996–2015. The eight horizontal bars in oval (from top to bottom) represent PB2, PB1, PA, HA, NP, NA, M and NS genes, respectively. Each color represents a virus lineage. The resulting genotype designation is depicted below.