Fig. 2From: Phylogenetic, antigenic and biological characterization of pigeon paramyxovirus type 1 circulating in ChinaUnrooted maximum likelihood radial phylogram of the isolate genotypes. The tree was constructed on a 374-nt section of the F gene sequences from 360 genotype VI NDV isolates and 24 other genotypes representative strains in GenBank, and relevant evolutionary analyses were conducted in MEGA7 [33]. The tree is to scale, with branch lengths measured in number of substitutions per site. Names of each PPMV-1 strain are not shown but represented by colored symbols. Genotypes and groups of each clade are labeled. All data and accession numbers for reference F gene sequences of the isolates and strains were from EMBL/GenBank based on established phylogenic analysis (Additional file 2: Table S2)Back to article page