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Allelism and Linkage of Three Genes in Chromosome 2B of Wheat for Reaction to Puccinia graminis tritici. William Q. Loegering, Pathologist, Department of Plant Pathology, University of Missouri, Columbia, MO 65201; Phytopathology 68:1202-1203. Accepted for publication 2 March 1978. Copyright 1978 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-68-1202.

The principles of interorganism genetics were used in selecting cultures of Puccinia graminis f. sp. tritici to study the allelism and linkage of the genes Sr9d, Sr9e, and Srtt1 for low reaction in wheat. It was found that Sr9d and Sr9e are alleles or very closely linked. Linkage of Srtt1 and Sr9 was estimated to be 24 7.8%.

Additional keywords: stem rust of wheat.