Resistance to Stripe Rust and Eyespot Diseases of Wheat in Triticum tauschii. A. Yildirim, Department of Crop and Soil Sciences, Washington State University (WSU), Pullman, 99164-6420. S. S. Jones, Department of Crop and Soil Sciences, Washington State University (WSU), Pullman, 99164-6420; T. D. Murray, Department of Plant Pathology, WSU, Pullman; T. S. Cox, USDA-ARS, Agronomy Department, KSU, Manhattan, KS; and R. F. Line, USDA-ARS, WSU, Pullman, WA. PLANT DIS. 79:1230. Accepted for publication 19 September 1995. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1995. DOI: 10.1094/PD-79-1230.

A collection of 279 Triticum tauschii (syn. Aegilops squarrosa) accessions was evaluated for resistance to stripe rust (Puccinia striiformis) and eyespot (Pseudocercosporella herpotrkhoides) diseases. Seedlings were inoculated with four different races of P. striiformis that represent all known virulences in the Pacific Northwest, and a genetically modified strain of P. herpotrichoides expressing Pglucuronidase. Seventeen percent (44) of the T. tauschii accessions were resistant to all Pacific Northwest races of stripe rust, and 45% (115) were resistant to eyespot. Thirtynine of the 279 accessions were resistant to the stripe rust races and the eyespot pathogen. Accessions resistant to stripe rust were mainly from the Caspian Sea region of Iran and A7xrbaijan, with the majority belonging to T. tauschii subsp, strangulata and T. t. subsp. meyeri. There was no clear association between resistance to eyespot and geographical origin or taxonomic subgroup.

Keyword(s): Triticum aestivum, wild wheat