Thirty-six cloned defense response (DR) genes from barley, maize and rice were used to add 58 loci to the map of the ITMI W-7984 x 'Opata M 85' recombinant inbred line (RIL) mapping population.
Mapping was performed in at least RILs 1-60 of the population. Linkage was determined with MAPMAKER using a LOD criterion of 2.0.