Induced mutation in okra by gamma rays and ethyl methane sulphonate

Singh, A.K.; Singh, K.P.

Vegetable Science 29(1): 30-33


Accession: 003811096

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The seeds of three okra cultivars (Parbhani Kranti, Hisar Unnat, and Satdhari) were treated with gamma rays (15, 30, 45, and 60 kR) and ethyl methanesulfonate (0.25, 0.50, 0.75, and 1.00%). Observations were recorded for M2, M3 and M4 generations. A number of mutants for one or more traits (plant height, maturity, branching, pigmentation, fruit size, and yield) were isolated from M2 and M3 generations. The performance and segregation patterns of some selected mutants were studied in the M4 population. The mean for various characters increased at lower rates of mutagens in all the cultivars in M2 and M3 generations. The magnitude of coefficient of variation (CV) was significantly higher than the control and declined from M2 to M3. High heritability and genetic advance were found for yield per plant, plant height, and number of seeds per fruit in M2 and M3 generations. Among a large number of mutants in the M4 generation, 8 in Parbhani Kranti, 11 in Hisar Unnat, and 7 in Satdhari were selected, which may prove useful for okra improvement programme.