Department of Nematology, College of Agriculture, Orissa University of Agriculture and Technology, Bhubaneswar-751 003, India.
*Krishi Vigyan Kendra, Gunupur, At/PO: Gunupur, Dist. Rayagada, Orissa-765 022, India, E-mail: jayanta_mahalik@yahoo.co.in.
Three mutagens each at two doses/concentration were used [Gamma-rays (30 Kr and 45 Kr), EMS (0.30 and 0.45%) and NG (0.010 and 0.015%) with control (parent variety)] to identify root-knot nematode resistant cultures of blackgram cv. Pant U-30 (susceptible) through mutation breeding process for sustainable nematode management for safer environment. The mutagen treated M2 population showed varying magnitude of induced variability of the characters studied. Mutagenic treatments were effective in inducing various growth characters like plant height, shoot dry weight, root length, root dry weight, flowering (50%), effective nodules per plant, pods per plant, seed weight/plant in M2 generation. The population mean and variance were computed and analysed. EMS (0.30%) was more effective in inducing positive responses of 7 characters out of 8 studied followed by EMS (0.45%), NG (0.015%), NG (0.010%), Gamma-rays (45 Kr), and Gamma-rays (30 Kr).
Ethyl Methane Sulphonate, Gamma-rays, Nitroso Guanidine, Meloidogyne incognita, Pant U-30
