Progress in assessing the impact of Fusarium head blight on oat in western Canada and screening of avena germplasm for resistance

Tekauz, A. and Mitchell Fetch, J. and Rossnagel, B. and Savard, M. (2008) Progress in assessing the impact of Fusarium head blight on oat in western Canada and screening of avena germplasm for resistance. Cereal Research Communications, 36 (Supple). pp. 49-56. ISSN 0133-3720

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Abstract

Fusarium head blight (FHB) of oat in western Canada was determined to be caused by a complex of Fusarium species, the composition and proportions of which varied considerably among years, and between Manitoba and Saskatchewan, the two main oat production regions (provinces) in western Canada. The levels of deoxynivalenol (DON), associated with Fusarium graminearum infection, were considerably higher in oat than in wheat and especially in barley, when levels of DON were compared to those of F. graminearum on seed, suggesting that oat may stimulate production of the mycotoxin by this causal species during the infection process, compared to that in other cereals. Testing of oat cultivars and lines for reaction to FHB indicated that while differences existed, these were relatively small. ‘Naked’ oats, in general, were more resistant. Several of the exotic oat accessions tested appeared to have superior levels of resistance and these are being used as parents in crosses to improve resistance in adapted, high quality oats.

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