Preliminary assessment of resistance among U.S. wheat cultivars to the Triticum pathotype of Magnaporthe oryzae

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Show simple item record Cruz, Christian D. Bockus, William W. Stack, James P. Tang, Xiaoyan Valent, Barbara Pedley, Kerry F. Peterson, Gary L. 2012-11-13T15:29:41Z 2012-11-13T15:29:41Z 2012-11-13
dc.description.abstract Magnaporthe oryzae is the causal agent of blast disease on several graminaceous plants. The M. oryzae population causing wheat blast has not been officially reported outside South America. Wheat production in the United States is at risk to this pathogen if it is introduced and established. Proactive testing of U.S. wheat cultivars for their reaction to blast and identification of resistance resources is crucial due to the national and global importance of the U.S. wheat industry. In this preliminary study, the phenotypic reaction of 85 U.S. wheat cultivars to M. oryzae (Triticum pathotype) was determined. Although there was a significant correlation in the reaction to blast at the seedling and adult plant stages, only 57% of the head reaction was explained by the seedling reaction. Because of the importance of disease development at the head stage in the field, assessment of all 85 cultivars occurred at the head stage. Among cultivars tested, a continuum in severity to head blast was observed; cultivars Everest and Karl 92 were highly susceptible with more than 90% disease severity, while cultivars Postrock, JackPot, Overley, Jagalene, Jagger, and Santa Fe showed less than 3% infection. No evidence of the presence of physiological races among isolates T-7, T-12, T-22, and T-25 was found. en_US
dc.language.iso en_US en_US
dc.relation.uri en_US
dc.subject Triticum pathotype en_US
dc.subject Magnaporthe oryzae en_US
dc.subject Wheat cultivars en_US
dc.subject Wheat blast en_US
dc.title Preliminary assessment of resistance among U.S. wheat cultivars to the Triticum pathotype of Magnaporthe oryzae en_US
dc.type Article (publisher version) en_US 2012 en_US
dc.citation.doi doi:10.1094/PDIS-11-11-0944-RE en_US
dc.citation.epage 1505 en_US
dc.citation.issue 10 en_US
dc.citation.jtitle Plant Disease en_US
dc.citation.spage 1501 en_US
dc.citation.volume 96 en_US
dc.contributor.authoreid bockus en_US
dc.contributor.authoreid ccruz en_US
dc.contributor.authoreid jstack en_US
dc.contributor.authoreid bvalent en_US

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