Figure 6From: Phylogenetic diversity and genotypic complexity of H1N1 subtype swine influenza viruses isolated in Mainland ChinaPhylogenetic tree of the M genes of the H1N1 subtype swine influenza viruses. The unrooted phylogenetic trees were generated by the neighbor-joining method using MEGA 5.0 software. Bootstrap values were calculated out of 1000 replicates and only bootstrap values of ≥70% were shown. Different lineages were indicated by different colors.Back to article page