Transfer of FHB Resistance Genes into Hard Red Winter Wheat

Fusarium head blight (FHB) is a serious foliar disease of hard red winter wheat (HRWW) in North Dakota. Disease resistance was identified as major component in disease management. First objective of this study is to transfer resistance QTL, Qfhb.rwg.5A.2 into HRWW germplasm. Second part of this study aims is to confirm FHB resistance of two-triticale-Th. distichum addition lines (W1450 and W1451) and attempt to bring acrocentric addition chromosome in W1450 into common wheat, and characterization of W1423X-3 progeny in search of true breed resistance genotype. Qfhb.rwg-5A.2 is transferred into three different populations, and haplotype consisting of three SNP close to centromere was identified as suitable haplotype for the target gene. FHB severity of the addition lines was less than 20% (greenhouse trial). Backcrosses are being made to bring addition chromosome of W1450 into wheat. Small proportion of W1423X-3 progeny appears as homozygous resistant, it needs further confirmation with cytogenetic techniques