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United States Department of Agriculture

Agricultural Research Service

Title: Repeatability and Relationship among Parameters Used to Evaluate Scab Resistance in Wheat

Authors
item Procopiuk, A - UNIVERSITY OF MINNESOTA
item Busch, Robert
item Groth, J - UNIVERSITY OF MINNESOTA
item Ozmon, E - UNIVERSITY OF MINNESOTA

Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: October 24, 1997
Publication Date: N/A

Technical Abstract: Scab in wheat (Triticum aestivum L.) caused by Fusarium spp. produces serious loss in yield and grain quality in the U.S. Upper Midwest. Use of resistant cultivars is the best way to control scab. In artificially inoculated field plots, wheat genotypes representing nearly the complete range of resistance to scab were evaluated for 3 years for incidence (% spikes infected) and severity (% infected spikelets), and also for greenhouse severity (spread within the head), to evaluate repeatability of these parameters and their relationship. Field incidence and severity, as well as field and greenhouse severity, were highly correlated in the germplasm examined. Repeatability of incidence was higher than was repeatability of severity. Field incidence is a useful trait to evaluate genotypes response to scab. Field severity might provide additional information about resistance to scab. Greenhouse severity is useful since large numbers of genotypes can be tested in the greenhouse year round and relates well to field severity.

Last Modified: 9/22/2014
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