Localising QTLs for leaf rust resistance and agronomic traits in barley (Hordeum vulgare L.)

The Hordeum vulgare accession 'HOR 1063' was crossed with the barley cultiv ar Krona, and 220 doubled haploid lines were produced based on this cross. A molecular map was constructed based on RFLP markers. Field trials were pe rformed over 2 years and at two locations. In field trials, resistance to l eaf rust by means of artificial infection, heading date, plant height and K ernel weight were assessed. For leaf rust resistance, 4 QTLs were localised , that explained 96.1% of the genetic variation. One QTL on chromosome 4H c onfirmed a position found in another genetic background and one mapped to t he same position as Rph16 on chromosome 2H. All digenic effects decreased t he effects of the respective QTLs. In addition to the denso-locus and the h ex-v locus, other QTLs influencing heading date, plant length and kernel we ight were found in this cross.