부산대학교 도서관

Response of 108 recombinant inbred lines from the cross between winter wheat Sincron(medium resistant) and F 1054 W(susceptible to Fusariumhead blight) to artificial inoculation with FHB was studied for 3 years, using several assessment criteria. Area under disease progress curve (AUDPC), relative weight of inoculated spikes (RWIS), relative weight of grains from inoculated spikes (RWG) and percentage of diseased (scabby) grains (PDG) were strongly correlated (r =0.78 to 0.90). The genetic component of variance was 45% of the total variance in AUDPC, 40% in PDG, 35% in RWIS and 33% in RWG, while genotype x environment interaction varied from 53 to 57%. Frequency distributions of lines were continuous for all assessment criteria, suggesting a quantitative inheritance of resistance to FHB, with no significant transgressions and with a slight asymmetry towards susceptibility. Significant differences were found between average AUDPC and RWIS of recombinant inbred lines with alternative alleles at the Gli1B and Gli1D loci. This suggests that quantitative trait loci (QTL) with relatively large effects on FHB resistance are located on chromosomes 1BS and 1DS.