Mutation studies in onion (Allium cepa L.) . II. Mutagenic effectiveness and efficiency of gamma-rays, ethyl methane sulphonate, N-methyl urea and ethyleneamine

Kataria, A.S.; Narendra Singh

Annals of Agricultural Research 10(2): 131-135

1989


Accession: 001891149

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Abstract
Seeds of the onion varieties Pusa Red, Pusa Ratnar and White Warangal were treated with gamma -rays (7.5, 10.0, 12.5 and 15.0 kR) and the mutagens ethyl methanesulfonate (0.05, 0.1 and 0.2%), N-methyl-N-nitrosourea (0.01, 0.05 and 0.1%) and ethyleneimine (0.05, 0.1 and 0.2%) and then sown and selfed at maturity. The frequency of chlorophyll mutations was assessed in the M2. gamma -Irradiation was 2 to 3 times more effective than the chemical treatments and 10.0 and 12.5 kR produced the highest incidence of mutations. The order of varietal susceptibility to the mutagens (mutagen effectiveness) was White Warangal > Pusa Ratnar > Pusa Red.