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 |
Three does each of gamma rays (200, 400 and 600Gy), ethyl methane sulphonate (0.2, 0.4 and 0.6%), nitrosoguanidine (0.005, 0.010, and 0.015%), maleic hydrazide (0.01, 0.02 and 0.03%) and in combination were administered to the seeds of two greengram varieties, Sujata and OBGG-52. In M2 generation, population mean got decrease with increase in variance for all the four traits studied and the magnitude of such changes varied with mutagens, their doses and the variety. Higher the dose of treatment greater the shift in mean and variance. The negative shift of mean was more pronounced in MH and its combined treatments in both the varieties. The M2 populations showed wider range of variations than the parent varieties. Genetic advance estimates showed that selection in many M2 treatment populations would be effective in bringing the improvement in yield/plant. Following selection among M2 plants and in M3 progenies on the basis of higher yield, ten mutant cultures in Sujata and eleven mutants in OBGG-52 were found significantly higher yield in M4 generations. Majority of them were from the groups of M2 mutagenic treatments sowing significantly higher population variance for yield/plants. Thus, selection of high yielding M2 plants in mutagenic treatments with significantly increased M2 variance for yield would be effective in isolation of high yielding micro mutant lines.
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