Abstract:

The infectivity of the take-all causing pathogen Gaeumannomyces graminis var. tritici (Ggt) on the seminal and secondary roots of wheat was determined with pot assay in glass house. The result showed that the seminal roots of wheat were highly susceptible to the infection of Ggt. However, the secondary roots were relatively resistant, and the degree of severity was associated with the age of roots and the resistance of wheat cultivars to the take-all disease. In comparison to 76120, 8793-8 was a cultivar resistant to the infection of Ggt.