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Resistance

Oligogenic Inheritance of Length of Latent Period in Six Slow Leaf-Rusting Wheat Cultivars. Tae Soo Lee, Former graduate student, Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907; Gregory Shaner, professor, Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907. Phytopathology 75:636-643. Accepted for publication 11 December 1984. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/Phyto-75-636.

The inheritance of latent period of Puccinia recondita on wheat was studied in crosses of slow- and fast-rusting cultivars inoculated with P. recondita in the greenhouse. Analyses of F₃ families and F₁ backcrosses for Morocco/SW 72469-6 and L574-1/Suwon 92 showed that the long latent period in slow-rusting wheats SW 72469-6 and L574-1 was conditioned by two partially recessive genes with equal effects. Latent period and uredinium size were negatively correlated. The long latent period in CI 10745 and Milyang 8-6 were conditioned by two recessive genes with equal effect. The long latent period was controlled by one or two recessive genes in P65113B6, and by three recessive genes in P6028A2.