National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
An experiment was made to determine the spectrum and frequency of different macro mutants induced by gamma rays on sesame with two genetic backgrounds. Treatment concerned seeds of the two cultivars Rama and Tillotoma, predominantly grown in West Bengal were irradiated by five doses (250, 300, 350, 400 and 450 Gy) of gamma rays at the Bhaba Atomic Research Centre (BARC), Trombey. Irradiated seeds along with control (unirradiated) were sown in University experimental farm, Visva-Bharati during pre-kharif in 2015, 2016 and 2017 to grow M1, M2 and M3 generation, respectively. All putative mutants were selected from M2 population were grown in the M3 generation to confirm their breeding behavior. A wide spectrum of the mutants under studies i.e. shattering resistance, determinate growth habit, early matured types etc. were observed. Among the all traits, shattering resistant and early matured type mutants were induced from both cultivars at each applied doses. Depends upon all traits under studies, Rama had the highest mutation frequency (8.64 x10-3) followed by Tillotoma (6.28 x 10-3). These results indicated that selection of unique mutants is not a matter of chance; rather it depends upon population size, the response of the cultivars to effective mutagenesis and careful screening.
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