Studies on the quantitative inheritance (8) : A. Rice (Oryza sativa L.) : (a) Inheritance of the length of panicles and the quantitative function of the causal genes in their length determination : (4) On the quantitative function of the two multiple genes and the dwarfish gene D&lt;SUB&gt;1&lt;/SUB&gt;

Syakudo, Katsumi; Tominaga, Masayoshi; Kawase, Tsuneo; Hayashi, Kisaburo

doi:10.1270/jsbbs1951.1.254

Cited by 2 publications

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“…The first two aspects mentioned above support the speculation that L 2 is of much higher order than L1 . The result that hereditary behaviour of individual quantitative characters can be explained with sufficient accuracy by the segregation of several genes (SYAKUDO et al ., 1952 ;FUKE, 1954 ;ROBERTSON, 1967), leads us to the estimation that L 1 is lower than 100 when only a single or a few undesirable characters of an otherwise superior cultivar are to be improved . This means that L 1 is negligibly small as compared to L 2 , the latter being in the order of 10 5 _ 10 6 .…”

Section: Optimum Mutation Ratementioning

confidence: 99%

On the optimum mutation rate and optimum dose for practical mutation breeding

Yonezawa

Yamagata

1977

Euphytica

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Mutation breeding, optimum mutation rate, optimum mutagen dose . SUMMARYOptimum mutation rates for practical purposes were discussed based on the theoretically derived formulae, and mutagen doses giving the optimum mutation rates were estimated from the experiments reported hitherto . It was suggested that in cereal crops such as rice and barley, considerably low mutation rates as with the mutagen doses lower than 5 kR of y or X rays and 2% •h of EMS are appropriate for obtaining directly applicable mutants . High mutation rates seem to be limited to the production of some rare breeding stocks .

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Section: Optimum Mutation Ratementioning

confidence: 99%