Submitted to: Oat International Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 11/13/2000
Publication Date: N/A
Technical Abstract: To identify QTLs in oat (Avena sativa) associated with adult-plant partial resistance to the crown rust pathogen (Puccinia coronata f. sp. avenae), a population of 158 F6-derived recombinant inbreds from a cross of an identified partial-resistance line MN841801-1 by a susceptible cultivar selection Noble-2 was mapped with 112 RFLP loci. A linkage map was constructed into 17 linkage groups and 23 unlinked loci. Three partial resistance QTLs were identified in field tests and explained about 27% of phenotypic variance. Two of these QTLs were also identified in greenhouse tests. The consistency of identification of these QTLs across three field environments and two greenhouse environments suggests that markers associated with them may be useful in marker-assisted selection for partial resistance to crown rust in oat breeding.