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Chemical mutagenesis inSorghum

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Proceedings / Indian Academy of Sciences

Abstract

The effect of NG, DEB and single and recurrent treatments after NMU on sensitivity in M1 and chlorophyll mutation frequency and spectrum in M2 was studied in the variety Co. 18 ofSorghum subglabrascens. Among the three chemical mutagens DEB was the most effective in delaying the emergence of primary leaf, and reducing the percentage of germination, survival and growth of root, coleoptile and seedlings, whereas NG was the least effective. The effect of mutagens increased with increasing dose. Recurrent treatments with NMU showed more drastic effects with respect to the above criteria than single treatments. The frequency of chimeras for chlorophyll deficiency in the M1 was found to be the maximum in the single treatments as compared to recurrent treatments after NMU. An increase in the reduction of pollen and seed fertility with an increase in dose of NMU and NG was observed. But the treatments with NMU showed more drastic effects on fertility than treatments with NG. The frequency of chlorophyll mutations was found to increase with dose in NMU, whereas such relationship was not observed in teratments with NG. The mutation rate was found to be higher in treatment with NMU than with NG. Whilealbina andxantha only were noticed in treatments with NG, a very wide spectrum of chlorophyll mutations was observed in NMU treatments. Recurrent treatments with NMU induced higher frequency and wider spectrum of chlorophyll mutations than single treatments.

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Author notes

  1. K. Sreeramulu

    Present address: Department of Genetics, Agricultural University, Wageningen, The Netherlands

Authors and Affiliations

  1. Faculty of Cytogenetics and Plant Breeding, Tamilnadu Agricultural University, Agricultural College and Research Institute, Coimbatore-3

    K. Sreeramulu

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  1. K. Sreeramulu
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Communicated by Prof. J. Venkateswarlu,f.a.sc.

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Sreeramulu, K. Chemical mutagenesis inSorghum . Proc. Indian Acad. Sci. 74, 161–173 (1971). https://doi.org/10.1007/BF03050628

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  • DOI: https://doi.org/10.1007/BF03050628

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