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Imprint
Diversify - Alternative resistances and strategies against leaf diseases in organic tomato breeding
Project
Project code: 2822OE026A
Contract period: 01.03.2024
- 28.02.2027
Budget: 334,587 Euro
Purpose of research: Applied research
Keywords: biological plant protection, fruit vegetables, horticulture, vegetable production, genetic resources, nutrients, crop production, plant genetic resources, plant diseases (virusus, bacteria, fungi, phytoplasma), organic farming
Resistance breakthroughs are increasingly occurring in widely grown commercial tomato varieties that were previously resistant to Fulvia fulva the causal agent of tomato leaf mold. These varieties were often developed using the Cf-9 resistance gene, which no longer provides reliable protection against newly emerging races of the pathogen. In the AlResiTom project, resistance genes to F. fulva, which have not been used in tomato breeding so far, will be crossed into common commercial cultivars and breeding lines to develop new resistant cultivars at five locations [Kultursaat e.V.]. The resistance of the new breeding lines will be continuously monitored by standardised screening against F. fulva at the Institute for Plant Protection in Horticulture and Urban Green of the Julius Kühn Institute [JKI-G]. In order to obtain broadly applicable varieties suitable for different growing systems and regions, several breeding lines will be also selected for resistance to powdery mildew (Erysiphe neolycopersici) and late blight (Phytophthora infestans). In a further approach, the new breeding strategy for 'F4 cross progenies', successfully developed in the BÖLN-funded project 'New Concept for Organic Tomato Breeding', will be evaluated in terms of its repeatability and thus its suitability for practical use [Kultursaat e.V., JKI-G]. Also based on the BÖLN project mentioned before, the map of the German speaking area on the occurrence of regional F. fulva races will be updated and supplemented in order to provide robust information on the dynamics of the pathogen's race development [JKI-G]. As an additional research approach, the suitability of plant-associated non-pathogenic microorganisms for increasing the resilience of tomatoes to leaf pathogens will be investigated in vitro and in planta, and the question of whether such an increase is dependent on the genotype of the tomato lines will be addressed [JKI-G].
Section overview
Subjects
- Plant Breeding
- Crop Protection
- Vegetable Gardening
Framework programme
Federal Organic Farming Scheme and other forms of sustainable agriculture (BÖLN)
