Abstract

Comparative mutagenic effectiveness and efficiency of EMS and gamma rays were studied in two varieties of soybean (Co(Soy)3 and JS-335) in terms of M2 progenies ; lethality and injury on the basis of chlorophyll and viable mutation frequency. Both mutagens produced high frequency as well as wide spectrum of mutations. The frequency of mutation was high at higher concentration/ dose of mutagen. EMS was the most effective and efficient mutagen compared to gamma rays. Higher the dose, higher the mutagenic effectiveness and lower the efficiency. JS 335 was the most sensitive variety to both mutagens.

Keywords: Effectiveness, Efficiency, Mutation frequency, Soybean, EMS and Gamma Rays