Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/23/1997
Publication Date: N/A
Technical Abstract: Fusarium Head Blight (FHB), caused by Fusarium spp., significantly reduces the quality of barley grown in the northern Great Plains. The quality of grain is reduced due to blighted kernels and the presence of deoxynivalenol (DON). Identification of DNA markers linked to FHB resistance and low DON levels can be used to select desirable breeding lines in early generations. The objective of this study was to identify molecular markers associated with FHB resistance and low DON levels in a doubled haploid (DH) population derived from the cross Foster//ND9712/Zhedar 2. This population consisted of 76 DH lines and was evaluated at five environments for FHB infection and DON levels. The three parental genotypes were surveyed for polymorphism with 171 low copy DNA clones. Four regions on chromosomes 2H, 5H and 7H were significantly associated with FHB resistance and low DON levels. Based on multiple regression, the markers accounted for 40.0 and 22.6% of the phenotypic variation in FHB resistance and low DON levels, respectively.