Phylogenetic analysis of 4 ORFs of PSV-Mi with strains of PSV, CMV and TAV showed that PSV-Mi, PSV-ER and PSV-W form three different evolution branches, which also supports above result.

• 4个ORFs的系统进化树也表明,PSV-Mi、ER和W株系各自形成独立的进化分枝,进一步证实上述结论。