Inheritance and Race Reaction of a New Soybean Rps1 Allele. R. I. Buzzell, Agriculture Canada, Research Station, Harrow, Ontario, Canada N0R 1G0. T. R. Anderson, Agriculture Canada, Research Station, Harrow, Ontario, Canada N0R 1G0. Plant Dis. 76:600-601. Accepted for publication 26 October 1991. 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, 1992. DOI: 10.1094/PD-76-0600.

A new soybean (Glycine max) allele, Rps1-d, for resistance to Phytophthora megasperma f. sp. glycinea was identified. A backcross-derived Rps1-d isogenic line of Harosoy, HARO 16, gave resistant reactions to races 1–7, 9–11, 13–16, 18, 21–22, 24, and 25 and susceptible reactions to races 8, 12, 17, and 19, the same as PI 103091, the source of Rps1-d.