DEVELOPMENT OF INNOVATIVE BREEDING STRATEGIES FOR INCREASING YIELD AND YIELD STABILITY AND PROMOTING GROWTH OF NARROW-LEAFED LUPIN (L UPINUS ANGUSTIFOLIUS)

A multi-lateral approach is being used to improve yield, quality and resistance of narrow-leafed lupin in Germany. Yield and protein content is being increased via development of tetraploids. To this end, various colchicine concentrations and application techniques were screened to obtain vital tetraploid plants. To increase the crop area of narrow-leafed lupins in Germany, the pH-tolerance has to be improved. This approach involves the investigation of different root-growth parameters. Plants grown under calcareous and alkaline soil conditions were characterised through quantification of stunted roots and shoots. The fostering effect of different rhizobial strains was also evaluated and plants inoculated with ‘HiStick ’ showed less growth repression. Stability of lupin seed production will be improved by the development of disease-resistant lupin cultivars. Wild accessions and cultivated varieties of L. angustifolius were tested to select novel resistance resources to soil-borne diseases. Six accessions showed tolerance to Sclerotinia sclerotiorum. Some cultivars were less susceptible to Fusarium oxysporum. Three breeding lines were tolerant to Thilaviopsis basicola and one cultivar showed tolerance to Rhizoctonia solani. Pathogen-specific primers were developed for PCR-based diagnosis of isolated pathogens, which also worked in plants infected by multiple pathogens