The innovative research experiment was conducted to develop high seed yielding genotype (JMM 991) with high oil content along with tolerance to Alternaria blight. An average increase in seed yield of 37% was obtained from zone II and V over Varuna in IVT. In advance trial, JMM 991 gave 22 % and 18% increases in seed yield over Kranti and Varuna respectively; whereas, the cumulative average of seed yield of zone II, repeat II and IV zone has showed the reverse trend over Varuna and Kranti, which is an increase of 13% and 6% respectively. Maximum seed yield 9.10 (g/plant) was recorded which is higher than Varuna (8.28 g/plant) and Kranti (6.19 g/plant). Highest oil content (42%) was recorded against checks namely Kranti (38%) and Varuna (37%) respectively. Test weight (1000 seed) indicated that it ranges from 4.43 to 4.90 (g) against Varuna (4.5 to 5.3 g). Interestingly, it showed non-significant differences between developed genotype and Varuna (check) gave 4.58 (g) and check had 4.63 (g) in the all IVT (irrigated and rainfed) trials both trials were conducted at 16 locations. Similar trend was noticed in the oil content (%) in both IVT and AVT trials; where it showed 39 and 38.6 (%) which is at par with Varuna. Most significantly, JMM 991 gave oil yield of 589 (kg/h) over varuna 476 (kg/h) which is 24% increase. Thus, this developed strain gave best performance under irrigated and rain-fed condition over checks. Moderate resistance to Alternaria blight was observed.