By backcross reciprocal monosomic analysis, Fusarium head blight (FHB) resistance of two resistant winter wheat lines was compared with the scab-susceptible cv. Hobbit-sib. Several chromosomes have been associated with scab resistance: 3A, 5A, 1B, 3B, 4B, 6B, 4D and 6D have been found to enhance scab resistance, but chromosome 2B from one resistant genotype was found to promote susceptibility.