The determination of physiological race of Fusarium oxysporum f.sp.lycopersici of tomato in Zhejiang, China

摘要

A group of differential tomato lines was used to identify the races of Fusarium oxysporum f. sp. lycopersici in Zhejiang, China. Marmande yerte carries no resistant genes and Marporum carries gene -1-. Both lines Motelle and Mogeor have Gene I- 1 and I-2. Tomato seedlings of eighteen days after sowing were inoculated with an isolate of Fusarium oxysporum f.sp. lycopersici, No. 98-2 and kept in a growth chamber. The seedlings were evaluated at fourteen days after inoculation. Results showed that Marmande verte and Marporum were severely infected by the pathogen and established as susceptible. Motelle and Mogeor were not infected and established as resistant. These results indicated that the isolate No. 98-2 represented the race 2 of Fusarium oxysporum f.sp. lycopersici and gene 1-2 is necessary for obtaining resistance to this pathogen in the Zhejiang region.