preprints.org > biology and life sciences > biochemistry and molecular biology > doi: 10.20944/preprints202101.0610.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 27 January 2021 / Approved: 29 January 2021 / Online: 29 January 2021 (10:55:47 CET)

The enhancement of Fusarium head blight (FHB) resistance is one of the best options to reduce mycotoxin contamination in wheat. This study has aimed to verify that the genotypes with high tolerance to deoxynivalenol could guarantee an overall minimization of the sanitary risk, by evaluating the contamination of regulated, modified and emerging mycotoxins on durum wheat cvs with different degrees of FHB susceptibility, grown under different meteorological condi-tions, in 8 growing seasons in North-West Italy. The years which were characterized by frequent and heavy rainfall in spring, were also those with the highest contamination of deoxynivalenol, zearalenone, moniliformin and enniatins. The most FHB resistant genotypes resulted in the lowest contamination of all the mycotoxins but showed the highest deoxyniva-lenol-3-glucoside/deoxynivalenol ratio and moniliformin/deoxynivalenol ratio. An inverse re-lationship between the amount of deoxynivalenol and the deoxyniva-lenol-3-glucoside/deoxynivalenol ratio was recorded for all the cvs and all the years. Converse-ly, the enniatins/deoxynivalenol ratio had a less intense relationship with cv tolerance to FHB. In conclusion, even though the more tolerant cvs, showed higher relative relationships between modified/emerging mycotoxins and native/target mycotoxins than the susceptible ones, they showed lower absolute levels of contamination of both emerging and modified mycotoxins.

3-acetyldeoxynivalenol; deoxynivalenol; deoxynivalenol-3-glucoside; enniatins; moniliformin; zearalenone

Biology and Life Sciences, Biochemistry and Molecular Biology

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