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Chromosomal Location of Genes for Resistance to Puccinia striiformis in Winter Wheat Cultivars Heines VII, Clement, Moro, Tyee, Tres, and Daws. Xianming Chen, Department of Plant Pathology, Washington State University, formerly USAD-ARS, Pullman 99164-6430; Roland F. Line(2), and Stephen S. Jones(3). (2)Agricultural Research Service, U.S. Department of Agriculture and Washington State University, formerly USDA-ARS, Pullman 99164-6430; (3)Department of Crop and Soil Sciences, Washington State University, formerly USDA-ARS, Pullman 99164-6430. Phytopathology 85:1362-1367. Accepted for publication 18 August 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/Phyto-85-1362.

The winter wheat (Triticum aestivum) cultivars Heines VII, Clement, Moro, Tyee, Tres, and Daws have been reported to have stripe rust resistant genes Yr2 and YrHVII, Yr9 and YrCle, Yr10 and YrMor, YrTye, YrTr1 and YrTr2, and YrDa1 and YrDa2, respectively. To confirm the existence of the genes and determine their chromosomal location, the cultivars were crossed with the seedling susceptible cultivar Chinese Spring and a set of 21 Chinese Spring aneuploids. Monosomic F1 plants were allowed to self-pollinate to produce F2 seed. Seedlings of F2 plants and their parents were inoculated with selected North American races of Puccinia striiformis. The results confirmed that Yr2 is on chromosome 7B and Yr9 and Yr10 are on chromosome 1B, and showed the tentative location of the following genes: YrHV11 on chromosome 4A, YrCle and YrMor on chromosome 4B, YrTye and YrTr1 on chromosome 6D, YrTr2 on chromosome 3A, YrDa1 on chromosome 1A, and YrDa2 on chromosome 5D.

Additional keywords: cytogenetics, gene interaction, host-pathogen interaction, monosomic analysis, yellow rust.