Review of research on use of radiation-induced mutations in crop breeding in Japan

A comparative study on the relative mutagenicity of radiations (X-and gamma rays) and chemical mutagens (EMS, MMS, dES and NEU) in inducing chlorophyll, viable and total mutations was made on three cultivated varieties (Co. 11, Co. 12 and Co. 18) of Eu-Sorghum. A critical comparison of the chlorophyll, viable and total mutations shows that the mutation rate increased with an increase in dose up to a certain dose level beyond which the saturation effect was observed. EMS was found to be the most potent mutagen in inducing chlorophyll, viable and total mutations. The treatments with NEU (viable mutations) and dES (viable and total mutations) also proved to be effective. In a large number of cases the relationship between chlorophyll and total mutations was more close than that of viable to total mutation rates.

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A comparison of mutagenic effectiveness and efficiency of NMU and MNG in Sorghum

Ramulu

1972

Theoret. Appl. Genetics

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A comparative study of the effectiveness and efficiency of NMU and MNG in relation to the effects in M1 plants and induction of mutations in M2 was made in a cultivated variety ofSorghum. There was a decrease in the values obtained in each of the biological criteria in the M1, namely germination, survival, seedling growth and seed fertility, with an increase in the concentration of NMU and MNG. Of the characters, survival following MNG treatments and seed fertility following NMU treatments showed the maximum reduction. NMU was not only effective in decreasing the mean of various characters in the M1, but also efficient in inducing a high frequency and wide spectrum of chlorophyll mutations in the M2 compared with MNG. Low concentrations were found to be more efficient than higher concentrations of NMU. The treated M2 population showed not only a decrease but also an increase in the mean height of plant and length of ear compared with the untreated control population. NMU caused a greater decrease in the mean of both characters and induced greater variability in the length of ear than did MNG treatment.

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Review of research on use of radiation-induced mutations in crop breeding in Japan

Cited by 5 publications

References 38 publications

Introduction/Review

Introduction/Review

Mutagenicity of radiations and chemical mutagens in Sorghum

A comparison of mutagenic effectiveness and efficiency of NMU and MNG in Sorghum

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