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II. Genetic Stocks Necrosis genes in common wheat varieties from Australia, Tibet and Northern Europe1) K. TSUNEWAKI and T. HORI Laboratory of Genetics, Kyoto University, Kyoto, Japan We have undertaken further investigations on the geographical distribution of necrosis and chlorosis genes, using common wheat varieties from Australia (73 varieties), Tibet (18 strains), Sweden (35 varieties), Norway (13 varieties) and Finland (15 varieties). The Australian varieties were obtained from Dr. I. A. WATSON, University of Sydney, and all the rest from the Swedish Seed Association ; their helps are greatly appreciated. Those varieties were crossed to three testers, Jones Fife, Prelude and Macha, and their F1 phenotypes were observed as to necrosis and chlorosis. Based on this observation, their genotype formulae were determined, that are given in Table 1. Detailed analysis of the results was published in the Japanese Journal of Genetics (42(4): 245-250, 1967). |
| 1) Supported by a grant from the Japan Society for the Promotion of Science as part of the Japan-U. S. Cooperative Science Program. |
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