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Importance of root lesion nematodes in German crop production and strategies to breed resistant varieties (NEMARES)
Project
Project code: JKI-RS-08-3397
Contract period: 01.11.2016
- 30.09.2019
Purpose of research: Applied research
Root lesion nematodes (RLN) are important pests worldwide with a large range of host species. These migratory parasites are able to infest a wide spectrum of crops. In the past decade, severe damage in German cereal production has been reported and this pest is regarded by farming experts as a major threat for cereal production. Narrow crop rotation, early-sowing dates, and mild winters which are expected due to climate change increase the damage by this pest. Assessment of RLN in the field as well as in the greenhouse is cumbersome and time consuming. Moreover, this pest has been largely disregarded by European cereal breeders so far. Aiming at the identification of wheat (Triticum aestivum) genotypes with low RLN infection rates and unravelling the genetic mechanisms for RLN resistance in barley and wheat, we will continue a previous project in which resistant barley lines have been identified and major QTLs for RLN resistance have been mapped. We bring together experts from plant breeding, bioinformatics, nematology, and plant physiology in a project divided into 4 Research Areas (RA).
Wheat genotypes resistant to root lesion nematode (RLN) are the most effective method to reduce yield losses. In order to detect resistance QTLs, a set of genetically diverse genotypes is a prerequisite. Due to the fact that principal coordinate analysis (PCoA) based on similarities and dissimilarities is unable to identity representative genotypes for each cluster, K-medoids have been applied to detect these. K medoids based on a Rogers' distances (RD) matrix was performed to select 300 diverse genotypes out of 852. PCoA results indicate a weak population structure for this set rendering it suitable for association genetics studies.
Section overview
Subjects
- Plant Breeding
Framework programme
Funding programme
Excutive institution
Institute of Resistance Research and Stress Tolerance (JKI-RS)
Participating institutions
Funding institution
Project management agencies
Associated projects: NEMARES
- Importance of root lesion nematodes in German crop production and strategies to breed resistant varieties, Subproject C
- Importance of root lesion nematodes in German crop production and strategies to breed resistant varieties
- Importance of root lesion nematodes in German crop production and strategies to breed resistant varieties, Subproject A
