| genetic variation within podosphaera tridactyla reveals a paraphyletic species complex with biological specialization towards specific prunus subgenera. | podosphaera tridactyla (ascomycota: erysiphales) is a morphologically variable species occurring on prunus s. lat. in order to assess the genetic variation within this species, the rdna its region was amplified from 29 specimens from a range of prunus species collected in australia, switzerland, and korea. rflp analysis of the pcr products revealed six groups, and a comparison of sequences from representatives of these groups revealed three clades: clade i contained all specimens from prunus sub ... | 2005 | 15912953 |