Figure 1From: Phylogenetic relationships and pathogenicity variation of two Newcastle disease viruses isolated from domestic ducks in Southern ChinaPhylogenetic relationships of the nucleotide sequences of 62 NDV strains based on the entire ORF (1 to 1,662Â nt) of the F gene (A) and the complete gene (B) (nt 1 to 15192). Sequences previously published in GenBank are listed in Materials and methods and Additional file 1: Table S1. The phylogram was generated by the neighbor-joining method using MEGA 4 software [16].Back to article page