Department of Plant Breeding and Genetics, College of Agriculture, Orissa University of Agriculture and Technology, Bhubaneswar–751 003, Orissa, India e-mail: bhaba4@sify.com
Thirty three genotypes of urdbean were used for studying efficacy of physical and chemical mutagenic treatments. Results indicated significant variation for days to flowering, days to maturity, primary branches/plant, pods/plant, seeds/pod, 100-seed weight and yield/plant. Maximum variability was observed for primary branches/plant, followed by yield/plant and pods/ plant. Maleic Hydrazide (MH) 0.01% was found to be the best mutagenic treatment for inducing favourable changes in days to flowering, days to maturity, primary branches/plant, seeds/ pod and yield/plant followed by Nitroso-guanine (NG) 0.005% and Gamma-ray 40kr + NG 0.010%. ‘PDU-1-9’, a mutant developed through NG (0.015%) mutagenic treatment gave highest yield/plant (8.03g) followed by ‘PDU-1-7’ and ‘PU-30-8’ developed through 0.005% and 0.010% NG treatments, respectively with each having yield of 7.76g/plant. In the present study, the relative effectiveness of mutagens was NG followed by MH, ethyl methane sulphonate (EMS) and Gamma-ray.
Chemical mutagens, Gamma-rays, Induced mutations, Micro-mutation, Urdbean
