Mutagen induced polygenic variability in sesame (Seslamum indicum L.)

摘要

Two varieties of sesame viz. SVPR 1 and CO 1 were treated with two mutagens viz. gamma rays and EMS. In M_2 generation, a wide range of polygenic variability in the form of micromutations was generated. M_2 generation shifted the overall mean values in the positive direction in lower doses upto 50 krad of gamma rays and 1.2% of EMS for the characters 1000 seed weight, oil content and single plant yield. Treated M_2 populations showed a much greater range of variability for all the characters than controls. Induced genetic variability was more in CO 1 than SVPR 1. The enhanced genetic variability observed for seed yield and its component characters in the M_2 generation of the present study indicated the scope for effective selection.