The present investigation was undertaken to study the effect of non particulate gamma radiation and EMS mutagens on linseed varieties viz., Baner, Him Alsi-2 and Surbhi. Many significant effects of EMS concentration and gamma rays dosages on seed germination were observed. The percent germination was reduced from 84, 86 and 80 to 65, 58 and 59 percent with 60 kR (kilo Roentgen) for cultivars Baner, Him Alsi-2 and Surbhi respectively. LD50 concentration of gamma rays varies in different varieties viz., 96.63 kR (Baner), 72.94 kR (Him Alsi-2- and 53.22 kR (Surbhi). The percent germination was reduced from 87, 94 and 79 to 49, 50 and 10 percent with 0.8 percent EMS for cultivars Baner, Him Alsi-2 and Surbhi respectively. Also, lethality (LD50) of EMS between varieties varies i.e., Baner (0.86%), Him Alsi- 2 (0.72%) and Surbhi (0.35%) showing that lethality depends upon the characteristics of seed. Variable effects were observed in field condition for seed germination and survival in all the varieties indicating that these mutagens can be used in improvement of particular characteristics of crop by following proper selection methods.

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