**2.17 Seed yield per plant**

Mean values for seed yield per plant decreased in treatments of GR and GR + EMS as compared to controls (Table-3). The maximum seed yield (16.76g) was noted in 300Gy and minimum (11.22g) in 200Gy as compared to control (14.54g). The combination treatment 300Gy + 0.5%EMS had induced maximum increase in seed yield per plant (16.01g) over control (14.54g). But all other treatments had caused reduction in seed yield per plant. In M3 generation seed yield per plant was increased in all gamma radiation treatments, but it decreased in combinations as compared to control (Table-4). Maximum total seed yield was recorded in 300Gy (19.60g) and in 200Gy + 0.4%EMS (16.96g) as compared to control (16.58g). Hakande (1992) reported wider variability in yield due to mutagenic treatments in winged bean, which was attributed to pollen sterility and genetical as well as physiological alterations caused by mutagens. Previous studies indicated that both additive and nonadditive genes contribute to yield. Luthra *et al*., (1979), Reddy and Sree Ramulu (1982) also supported the above view.
