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 |
Genetically pure seeds of rice bean (Vigna umbellata Thunb., Ohwi & Ohashi) variety viz., RBL 50 was used for induction of mutation by using three concentrations (0.2%, 0.4% and 0.6%) of Ethyl Methanesulphonate (EMS) and three doses of gamma rays (150Gy, 200Gy and 250Gy) to study the effect of mutagens on the M1 population of the crop. Observations on thirteen characters were recorded and subjected to appropriate statistical analysis based on the sample mean. Numerical Taxonomy (Sneath and Sokal, 1973) method was followed to classify the mean values of all the quantitative data for all M1 traits to find out the similarities among different mutagenic treatments. Invariable reduction in means of germination (%), initial plant population, plant height, length of pod and number of seeds/pod and a reverse trend for days to 50% flowering, days to maturity, branches/plant, pods/cluster, pods/plant, 100-seed weight and seed yield per plant was noticed in both the mutagenic treated populations compared to the mean of the corresponding character in control. Dose dependent reduction in means of characters for germination (%), initial plant population, plant height and seed yield per plant was observed in all the mutagenic treatments. Similar trend was also observed for clusters/plant, branches/plant, length of pod in gamma rays treatments and pods per plant and seeds per pod in EMS treated populations. Mutagenic treatments with below LD50 dose of mutagens were grouped in Cluster-I (0.2% EMS, 150Gy and 200Gy), EMS (0.6%) in Cluster-II, medium dose mutagenic treatments (0.4% EMS and 250Gy) in Cluster-III and control in Cluster-IV. Grouping of mutagenic treatments of different concentrations in different clusters indicated the phenological differences among the treatments.
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