Resistance to Fusarium head blight in spring barley
Chrpova, J.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic) | Sip, V.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic) | Stockova, L.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic) | Stemberkova, L.,Vyzkumne Centrum SELTON, Stupice (Czech Republic) | Tvaruzek, L.,Agrotest Fyto, Kromeriz (Czech Republic)
Fusarium head blight (FHB) is a fungal disease causing substantial yield and quality losses in barley. Genetic variation in deoxynivalenol (DON) content and important yield traits in response to FHB were studied in 44 spring barley cultivars for two years following artificial inoculation with Fusarium culmorum under field conditions. The analysis of variance revealed that the largest effect on DON content and simultaneously on the reduction of thousand grain weight (TGW) and grain weight per spike (GWS) were due to the environmental conditions of the year, while the visual disease symptoms depended on the cultivars to a larger extent. All these traits were significantly interrelated. The most resistant cultivars Murasski mochi, Nordic, Krasnodarskij 35, Krasnodarskij 95, Nordus, and Usurijskij 8, together with the resistant check Chevron, showed the lowest DON content, the lowest expression of disease symptoms and the lowest reduction of TGW and GWS. However, most spring barley cultivars registered in the Czech Republic in recent years expressed susceptibility or medium resistance and were considerably affected by the disease. This increases the importance of breeding barley for resistance to FHB.
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