Abstract:

In order to study the genetic variation of Yunnan Exserohilum turcicum from the molecular level, and provide theoretical basis for Exserohilum turcicum pathogenicity virulence differentiation and effective control of disease, Using random amplified polymorphic DNA technique, fifty-six Exserohilum turcicum isolates on maize that from some areas of Yunnan Province were tested for RAPD. Based on the distance, a dendrogram was constructed of the 56 strains tested, 10 genetic groups were formed. There was no correlation found between RAPD group and the geographic origin. The analysis showed that some strains from one area were closely related to some from another area. Nonetheless, rich genetic variation existed among the tested strains.