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Tamil Nadu Agricultural University Coimbatore, INDIA

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EFFECTIVENESS AND EFFICIENCY OF THE MUTAGENS GAMMA RAYS AND ETHYL METHANE SULFONATE ON UMABEAN (PHASEOLUS LUNATUS L.)

D. Sassi Kumar, T. Nepolean, A. Gopalan

Affiliations

¹Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore - 641 003, India

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Cite article:- Kumar Sassi D., Nepolean T., Gopalan A. (2025). EFFECTIVENESS AND EFFICIENCY OF THE MUTAGENS GAMMA RAYS AND ETHYL METHANE SULFONATE ON UMABEAN (PHASEOLUS LUNATUS L.). Indian Journal of Agricultural Research. 37(2): 115 -119. doi: .

ABSTRACT

Two mutagens, physical (gamma rays) and chemical (EMS) were tested on lima bean for assessing their sensitivity. Dose/concentration were fixed by LD50 value as 16 KR for gamma rays and 40 mM concentration for EMS based on germination and survival percentage. The effectiveness and efficiency was worked out by accounting lethality, injury and sterility in M1 generation of treated seeds and spectrum of viable mutants was screened in M2 generations. It was observed that the frequency decreases with increasing dose/cqncentratlon of mutagen. EMS is more effective in producing extreme chlorophyll mutants. The physical mutagen i.e., gamma rays produced more viable mutants including early maturing plants, dwarfness and higher yielder. Gamma rays at lower dose i.e. 8 to 20 KR can be imposed to obtain beneficial mutants In limabean

KEYWORDS

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