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Methods for Screening Wheat Genotypes for Resistance to Sharp Eyespot in the Field and Greenhouse
Jiang Liu1, Nicole P Anderson2, Christopher C Mundt1
1Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331-2902, U.S.A.
Plant Disease
|October 20, 2020
Summary
Developing effective screening methods for wheat sharp eyespot resistance is crucial. Field trials with artificial inoculation identified resistant cultivars Bobtail and Rosalyn, proving this method
Area of Science:
- Plant pathology
- Agricultural science
- Wheat breeding
Background:
- Sharp eyespot, caused by *Rhizoctonia cerealis*, is a significant wheat disease.
- Developing robust screening methodologies is essential for breeding resistant wheat varieties.
Purpose of the Study:
- To develop and evaluate a screening methodology for wheat genotypes resistant to sharp eyespot.
- To identify wheat cultivars with consistent resistance under field conditions.
Main Methods:
- Screening wheat genotypes for sharp eyespot resistance under field and greenhouse conditions.
- Utilizing artificial inoculation techniques to achieve adequate disease pressure.
- Evaluating the effect of planting date on disease severity.
Main Results:
- Significant differences in disease severity were observed among wheat cultivars and trial types.
- Cultivars Bobtail and Rosalyn exhibited consistently lower sharp eyespot severity in field trials.
- Artificial inoculation was critical for effective screening; planting date had minimal impact.
- Greenhouse inoculation, particularly of seedlings, was less effective for categorizing resistance.
Conclusions:
- Field trials with artificial inoculation are a feasible method for selecting wheat genotypes resistant to sharp eyespot.
- Cultivars Bobtail and Rosalyn demonstrate potential for breeding programs targeting sharp eyespot resistance.
