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United States Department of Agriculture

Agricultural Research Service

Research Project: CHARACTERIZATION OF HOST-PATHOGEN INTERACTIONS IN BARLEY AND WHEAT

Location: Cereal Crops Research

Title: Resistance to Tan Spot and Stagonospora nodorum Blotch in Wheat-Alien Species Derivatives

Authors
item Oliver, R. - NORTH DAKOTA STATE UNIV.
item Cai, X. - NORTH DAKOTA STATE UNIV.
item Wang, Richard
item Xu, Steven
item Friesen, Timothy

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 15, 2007
Publication Date: January 1, 2008
Citation: Oliver, R.E., Cai, X., Wang, R., Xu, S.S., Friesen, T.L. 2008. Resistance to Tan Spot and Stagonospora nodorum Blotch in Wheat-Alien Species Derivatives. Plant Disease. 92:150-157.

Interpretive Summary: 199 wheat-alien species derivatives were evaluated at the seedling stage for resistance to tan spot and Stagonospora nodorum blotch of wheat. Among the 199 derivatives evaluated, 65 exhibited tan spot resistance similar to the resistant control. Thirty derivatives showed SNB resistance similar to the resistant control. Eleven derivatives were statistically similar to the resitant control for resistance to both diseases. Reactions of the derivatives and their respective wheat parents to tan spot and SNB suggest that resistance genes in the derivatives are derived from alien species. These derivatives are a desirable bridge for moving resistance genes from alien species to cultivated wheat, and could contribute new tan spot and SNB resistance to wheat breeding.

Technical Abstract: Tan spot [caused by Pyrenophora tritici-repentis (Died.) Drechs.] and Stagonospora nodorum blotch (SNB) [caused by Stagonospora nodorum (Berk.) Castellani and Germano] are destructive fungal diseases of wheat (Triticum aestivum L.) throughout the world. Host plant resistance is thought to be an efficient and economical method of control. The objective of the present study was to identify novel sources of tan spot and SNB resistance from wheat-alien species derivatives. Evaluations were conducted at the seedling stage in a growth chamber with 100% relative humidity. For each genotype, three replications were used for each disease. Among the 199 derivatives evaluated, 65 exhibited tan spot resistance similar to BR34, a Brazilian wheat line used as the resistant control. Thirty derivatives showed SNB resistance similar to BR34. Eleven derivatives were statistically similar to BR34 for resistance to both diseases. Reactions of the derivatives and their respective wheat parents to tan spot and SNB suggest that resistance genes in the derivatives are derived from alien species. These derivatives are a desirable bridge for introgression of resistance genes from alien species to cultivated wheat, and could contribute novel and vigorous tan spot and SNB resistance to wheat breeding.

Last Modified: 8/1/2014
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