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Imprint
Development of late-blight (Phytophthora infestans) resistant breeding material for organic farming (Phytophthora-Resistents)
Project
Project code: 2810OE121, JKI-ZL-08-3178
Contract period: 01.04.2012
- 31.10.2018
Budget: 529,079 Euro
Purpose of research: Applied research
A focussed breeding of potato varieties for organic farming in Germany shall be initiated by a network of organic farmers, potato breeders, and research institutes. Organic farmers shall be actively involved in the breeding process. The project aims at combining low susceptibility against late blight (Phytophthora infestans) with other positive resistance as well as quality traits in pre-breeding materials. Use of current molecular selection methods and the participation of the IPK genebank ensures a purposeful and sustainable approach with the required genetic diversity. Recent varieties and breeding clones will be evaluated for its late-blight reaction under organic-farming conditions. A broad genetic characterisation of late-blight resistance with DNA markers within this breeding material will be achieved. A combination of classical and molecular breeding methods shall be used to pyramid different resistance genes and to combine them with quality traits. The breeding materials developed will be tested and selected under organic-farming conditions. This approach results in the basic concept for a future breeding of clones adapted for organic potato farming. Trial sites will be selected to ensure results relevant to organic farming. Yield stability in organic potato production and competitiveness of German potato breeding will be improved substantially. The project is expected to compile information on the usability of late-blight resistant potato breeding clones carrying good agronomic and quality traits for organic farming under a regime of reduced copper-based fungicide application.
Results after 2 years of field testing revealed enhanced quantitative late-blight resistance of the foliage (low rAUDPC values) for some novel C and D potato clones. This pre-breeding material will have to be propagated and provided to participating plant breeders in the coming project period. Some of the clones also revealed high resistance to tuber blight under Iaboratory conditions. Marker-trait associations to rAUDPC values were found through genotyping of breeding clones and varieties by Diversity-Array Technology (DArT). The data will have to be confimed in repeated experiments in the coming year.
Section overview
Subjects
- Plant Breeding
Framework programme
Federal Organic Farming Scheme and other forms of sustainable agriculture (BÖLN)
Funding programme
Excutive institution
Institute for Breeding Research on Agricultural Crops (JKI-ZL)
