| II. Genetic Stock Necrosis genes in common wheat varieties from the USSR and the East Mediterranean Region K. TSUNEWAKI and Y. NAKAI Laboratory of Genetics, Faculty of Agriculture, Kyoto University, Kyoto 606, Japan We have undertaken further investigations on the geographical distribution of necrosis and chlorosis genes, using 333 common wheat varieties (or strains) from the USSR (237 varieties, out of which 158 were from Caucasus), Turkey (67), Syria (2), Lebanon (1). Jordan (1), and Egypt (25). Those varieties were crossed to three testers, Jones Fife (ne1Ne2ch1Ch2), Prelude (Ne1ne2ch1Ch2) and Macha (Ne1ne2Ch1ch2), and their F1 phenotypes were observed as to necrosis and chlorosis. Based on this observation, their genotype was determined as shown in the following table. The materials used were kindly provided by Dr. I.A. SIZOV of the Plant Industry Institute, Leningrad, USSR; and Dr. M. TANAKA of the Plant Germ-Plasm Institute, Kyoto University, Kyoto, Japan. We wish to express deepest appreciation to both of them. (Received August 15, 1974) |
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