| Apple stem pitting virus (ASPV) is one of the most important latent viruses that infects fruit trees. Based on
the nucleotide sequence of coat protein (CP) gene from 6 Chinese isolates and other isolates from GenBank, the
characteristics of genetic polymorphism of ASPV population were analyzed. The within-population and between-population
nucleotide diversities of CP gene among different geographical and hosts origins were analyzed with MEGA 4.0. The results
indicated that there were not various relativities between the genetic polymorphism and the geographical and hosts origins.
The variation of CP gene was located in purifying selection, and the Asian isolates and pear isolates of ASPV had higher
pressure of selection. The analysis of DnaSP software showed that ASPV suffered various population dilatation and the
dilatation would continue to develop. Therefore, it need further enhance the detection of virus and elimination of virus for
seedlings and strictly control the spread of seedlings infected by ASPV. Key words: Apple stem pitting virus; population; nucleotide diversities |
