INHERITANCE OF ADULT PLANT STRIPE RUST RESISTANCE IN WHEAT CULTIVARS KUKRI AND SUNCO
J. Kaur, H.S. Bariana
Genetic analyses of adult plant stripe rust resistance in Australian wheat cvs Kukri and Sunco were performed using Puccinia striiformis f. sp. tritici pathotype 134 E16A+ during 2003. Both cultivars showed the presence of three independent adult plant stripe rust resistance genes. Three types of responses were observed among monogenically segregating lines from both cvs Kukri and Sunco. Genotyping with the Lr34-linked marker csLV34 indicated the presence of the linked genes Lr34/Yr18 in cv. Sunco. The other two genes carried by cv. Sunco were YrCk and YrCk2. Based on pedigree analysis, cv. Kukri is expected to carry Yr29 and Yr30, but presence of loci different to these genes cannot be ruled out. The genetic independence of APR genes carried by cvs Kukri and Sunco was confirmed by segregation analysis of a F3 population derived from a Sunco/Kukri cross.