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Cephalosporium gramineum stripe of winter wheat pathogen virulence sources of resistance and effect on grain quality

Cephalosporium gramineum stripe of winter wheat pathogen virulence sources of resistance and effect on grain quality

Phytopathology 67(9): 1142-1148

The virulence of 25 isolates of C. gramineum from various areas in North America was determined on winter wheat [Triticum aestivum]. Most isolates caused more than a 40% yield reduction, a few isolates caused little yield reduction. Increased virulence was reflected in adverse effects on grain and flour quality, i.e., test wt, flour yield and physical dough properties. These effects were not great enough to significantly affect loaf volume plus grain and texture. Over 1000 red winter wheats from the U.S. Department of Agriculture World Collection and other sources were screened for resistance to C. gramineum in the field using oat kernel inoculum. In terms of the least reduction in yield, kernel wt and kernels per head, when infected by highly virulent isolates, the 4 best lines were P.I. 278212, C.I. 11222, and Crest line row components 40 and 51.

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