Anthracnose ripe rot is a common disease caused by Collelotrichum coccodes and other Colletotrichum species (Barksdale 1972). Fruit exhibiting anthrac-nose symptoms have sunken, dark, circular lesions on ripe fruit. This disease is primarily found on processing tomatoes grown in humid regions. Resistance was first reported in 1964 (Robbins and Angell 1970) as partially dominant and polygenic. However an F2 population studied by Stommel and Zhang (1998, 2001) identified three regions associated with resistance. The transfer of resistance into adapted breeding lines from unadapted, small-fruited S. pimpinel-lifolium germplasm was impeded, and the pheno-typic variation explained by any single QTL was small.
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