Genetic Characteristics of ORF1 Gene of Porcine Torque Teno Virus Genogroup 2 in Fujian

The ORF1 Gene of porcine torque teno virus genogroup 2 was amplified by PCR method from the piglets sera genome association with post-weaning multisystem wasting syndrome from Fujian,the target product was cloned and sequenced.The results demonstrated that the porcine torque teno virus genogroup 2 ORF1 gene was 1875 bp in length,coding an open reading frame(ORF) with 624 amino acids.The nucleotide sequence and the amino acid sequence deduced from the gene were analyzed by the bioinformatics software.Compared with the porcine TTV2 ORF1 genes download from GenBank,the sequenced gene shared the highest homogeneity with FJ/China/2010/TTV2/2(GenBank accession number JF937656) strain at 98.8%,but shared lower homogeneity with SC strain(GenBank accession number HQ204188) strain only at 83.5%.According to the results of the phylogenetic relationship,the porcine torque teno virus had three subbranches,the Fujian isolates had two different branches,which means that there had more than two TTV2 sub-genogroups in Fujian,China.