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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.

Additional keywords: durable resistance, genetics, Triticum aestivum.