Fusarium head blight (FHB), primarily incited by Fusarium graminearum Schwabe, is the most devastating disease of barley (Hordeum vulgare L.) in Canada. Contaminated grains are unsuitable for use as livestock feed or by the malting industry, primarily due to contamination by mycotoxins such as deoxynivalenol (DON). Reducing DON content has been a long-term goal of barley breeders; however, the complex genetics of resistance and laborious testing required have made it difficult to develop resistant cultivars....