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- W2044998761 abstract "Patnai, a pure-line winter variety of rice (Oryza sativa L.), was exposed to continuous or chronic gamma irradiation from a 20-C Co/sup 60/ source in attempts to induce genetical changes. The plants, which were grown from germination to maturity in the gamma field, received four doserates of 54.4, 6.1, 2.2, and 1.1 r/day of gamma rays. The control was grown away from the source in a zone that received no radiation. In plant height, number of tillers per plant, and mean time of flowering there was not much variation. However, there was stimulation in the number of flowers per panicle in all the dose-rates. Seed fertility was impaired. The gamma /sub 2/ had no variation except that one of the irradiated panicle progenies segregated for a chlorophyll mutant. The gamma /sub 2/ panicles segregated for chlorophyll mutations like albino, xantha, and virescent in the gamma /sub 3/ generation, which indicates that mutations were induced at a stage later than the separation of male and female organs of gamma / sub 1/ flowers. The mutation rate increased with increasing dose-rates of gamma radiation. (auth)" @default.
- W2044998761 created "2016-06-24" @default.
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- W2044998761 date "1962-01-01" @default.
- W2044998761 modified "2023-09-26" @default.
- W2044998761 title "EFFECTS OF CHRONIC GAMMA RADIATION IN RICE (ORYZA SATIVA L.)" @default.
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