Molecular Variation Of Potato Virus Y In China

Potato virus Y (PVY) is an important viral pathogen infecting Solanaceous crops. The study was conducted to analyze the characterization of molecular variation of PVY isolates in China. Sequence analysis of coat protein (CP) gene for 48 Chinese isolates of PVY showed nucleotide identities ranged from 76.8 to 100.0%. Phylogenetic analysis showed that all PVY isolates formed five groups, and there was not a tendency for isolates to group according to their geographical origin or hosts. Recombination analysis showed that no typical recombination event was found. A high level of sequence variability was found among PVY isolates, and it was likely to have several complicated strains of PVY in China.