engleski

How does the resistance to Fusarium head blight effect the deoxynivalenol accumulation in wheat?

Fusarium head blight (FHB) is a wheat disease that affects numerous wheat cultivating regions, including Croatia, reducing the safety and the quality of the wheat and wheat-derived food. The most occurring mycotoxin produced by Fusarium spp. is deoxynivalenol (DON), the immunotoxic mycotoxin, harmful to humans and animals. Its concentration is regulated in raw cereals, food, and feed, therefore it is important to control the wheat infection to be able to use the cereals in food and feed industry. The aim of this work was to compare the resistance to FHB of winter wheat varieties grown in Croatia by carrying out research at the field by using natural contamination without fungicide protection as a control and inoculation treatment with a mixture of Fusarium culmorum and F. graminearum as high contamination scenario. Total 25 varieties were tested and divided into four subgroups according to their declared resistance: resistant (R), moderately resistant (MR), moderately susceptible (MS) and susceptible (S). The resistant varieties had the best resistance to high contamination with F. culmorum and F. graminaerum (median DON concentration 328 µg kg-1), and natural contamination (median DON concentration 50.0 µg kg-1). And on average the varieties did show resistance to FHB, and DON accumulation, but there were several exceptions. In the high contamination scenario, the highest sensitivity was detected in S variety with maximum DON concentration of 6663 µg kg-1, and the most susceptible in control group was variety declared as MR with maximum DON concentration of 580 µg kg-1. The research has proven that there is a need for further research and harmonization of declaration for the susceptibility of the varieties to FHB and DON accumulation to ensure further food and feed safety and quality.

deoxynivalenol ; Fusarium head blight ; wheat ; Croatia ; LC-MS/MS

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