Differences were found in the radiosensitivity of cacao clones. Studies are continuing to see if these differences are related to nuclear damage. Radiosensitivity of rubber, palms, and bananas are being studies. Angustifolia mutants appeared from irradiated coffee seeds. The response was linear with thermal neutrons but exponential with gamma rays. The hypothesis of a two hit chromosomal aberration is being tested with coffee and Crotalaria which probably gave an exponential response (sectorial discoloration) to gamma rays. Mutation breeding is continuing in order to get earliness and lodging resistance in rice, and non-shattering in sesame. Strong chiasma localization was found in …
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Added Title:
Atomic Energy Commission Report AECU-4731
Description
Differences were found in the radiosensitivity of cacao clones. Studies are continuing to see if these differences are related to nuclear damage. Radiosensitivity of rubber, palms, and bananas are being studies. Angustifolia mutants appeared from irradiated coffee seeds. The response was linear with thermal neutrons but exponential with gamma rays. The hypothesis of a two hit chromosomal aberration is being tested with coffee and Crotalaria which probably gave an exponential response (sectorial discoloration) to gamma rays. Mutation breeding is continuing in order to get earliness and lodging resistance in rice, and non-shattering in sesame. Strong chiasma localization was found in Crotalaria, coffee, and rye, and the effect of gamma irradiation is being studied. A program of the genetics and breeding of forage grasses was begun. Radiation will be used with some apomictic biotypes.
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