Molecular Markers Linked To Cladosporium Fulvum Resistance Genes Cf₁₁ And Finding This Gene In Tomato Germplasm

The study based on the genetic analysis of resistance to Cladosporium fulvum, AFLP markers that linked to the resistance gene Cf₁₁ were identified. At the same time, tomato germplasm resistant to Cladosporium fulvum were screened with inculation and mocular markers on AFLP.1. Resistance to race 1.2.3.4 of Cladosporium fulvum was found to due to a single dominant gene through analyzing resistance behavior of the cross HN16(susceptible)╳HN42(resistible).The results indicated that the difference of two parents resistanc and susceptibility is obvious, the male parent HN42 shows resistance and the female parent HN16 shows susceptibility .The ratio of number of resistance and susceptibility on F₂ is 3.17:1.00,which accorded with the ratio of 3:1.The results shows resistance to Cladosporium fulvum is dominated by single dominant gene.2. Four AFLP markers linked to the resistant gene Cf₁₁ were identified. The genetic distance of four AFLP markers on E54M37-G,,E62M61-A,,E85M79-D and E62M59-G are 10.1 cM,12.3cM,14.5 cM and 18.8cM differently.3. Using AFLP marke to screen the tomato germplasms ,at the same time identifying the resistance with race 1.2.3.4 in the greenhouse .There are 21 of 48 cultivars and lines were resistant tomato germplasm resoures. Among them 3 have Cf₁₁ gene. This the AFLP marker improved is credible.