Sequencing and Analysis of the Genomes of Three Newcastle Disease Viruses Isolated from Guangxi
Abstract: Eight pairs of specific primers were designed and synthesized based on the entire genomic sequence data of Newcastle Disease Virus (NDV) present in GenBank. Complete nucleotide sequences of GX7/02, GX9/03 and GX11/03 strains were acquired by reverse transcription-polymerase reaction. The entire genomic sequences of three NDV strains consisted of 15 192 nt, which was the same in length to 7 NDV ZJ1, U.S/Largo/71, Italy/2736/00 strains, but was 6 nt longer than LaSota, Clone-30 and B1 strains in GenBank. The additional 6 nt motif was located in the non-coding region of nucleoprotein (NP) gene between nucleotides 1647 and 1648 of the entire genomic sequences of NDV LaSota, B1 and Clone-30 strains. The results of identity analysis of nucleotide and amino acid sequences showed that the identities between GX7/02, GX9/03, GX11/03 and ZJ1 strains were higher than that of the three strains of LaSota, B1 and Clone-30.