Abstract
The present investigation was carried out with an objective of assessing the response of four selected groundnut genotypes viz., Smruti, Devi, ICGV 7220 and ICGV 2266 to doses of mutagenic treatments. Mutagenic concentrations of 0.2%, 0.3% and 0.4% of EMS and sodium azide were taken respectively. The frequency, effectiveness and relative efficiency of mutagenic treatments in M1 generation were calculated based on the seedling characters. The genotypes showed varied response to different concentrations of the two mutagens. SA produced a greater number of mutants with increase in concentration. Smruti showed reduced mean seedling height. Genotype vigour index was high for ICGV 7220. Efficiency of mutagen varied according to genotype. Effectiveness ranged from 1.975 (V3E2) to 8.148 (V1N1). Mutation rate (in terms of efficiency and effectiveness) was highest in SA treated Smruti (7.099) M1 generation compared to EMS (3.447).
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