Submitted to: American Phytopathological Society Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 3/1/2008
Publication Date: 7/1/2008
Citation: Wegulo, S.N., Dowell, F.E. Evaluation of visual and optical sorting of Fusarium damaged kernels in winter wheat. American Phytopathological Society Annual Meeting. Phytopathology 98:S167.
Technical Abstract: Fusarium head blight (FHB) of wheat, caused by Fusarium graminearum, often results in shriveled and/or discolored kernels referred to as Fusarium damaged kernels (FDK). Determination of FDK usually is done visually. Visual sorting can be laborious and is subject to inconsistencies resulting from variability in intra-rater repeatability and/or inter-rater reliability. Visual sorting of FDK in 21 subsamples of scabby wheat grain by two raters was compared to sorting by a single kernel near infrared (SKNIR) system. Visual sorting was strongly correlated with sorting by the SKNIR system (0.82 less than or equal to r less than or equal to 0.91). However, the SKNIR system was more consistent with correlation coefficients between replicate runs (4 runs) in the range 0.91 less than or equal to r less than or equal to 0.96 compared to 0.49 less than or equal to r less than or equal to 0.80 for visual sorting. Standard errors (SE) of the mean of FDK sorted by the SKNIR system were smaller (0.82 less than or equal to SE less than or equal to 7.09) than SE of the mean of FDK sorted visually (2.63 less than or equal to SE less than or equal to 16.78). The results from this study indicate that consistency can be improved by sorting FDK with the SKNIR system.