MEAL AND OIL QUALITY AMONG GENOTYPES OF INDIAN MUSTARD (BRASSICA JUNCEA) VARIES UNDER RECOMMENDED DOSE OF NITROGEN FERTILIZER

Out of the 24 genotypes of Indian mustard 63 % showed increase in total seed nitrogen content after 80 kg N (N80) application while 37 % showed a decrease compared to control (N0). In some genotypes the increase in total seed nitrogen content under N80 had no influence on total soluble protein. About 88 % genotypes showed reduction in crude fiber by 1.10 % (GM-2) to 35.6 % (DRMR-IJ-31) and in all 24 genotypes soluble sugars also reduced by 8% (Maya) to 80% (HB-9912) suggesting the influence of N application on digestibility of meal. Profiling of seed storage proteins showed differences in banding patterns in treated samples with prominent changes in a and beta chains of cruciferin. In case of SFA and omega 6:omega 3 ratio, 50% of genotypes showed increase while 50 % genotypes showed a decrease in their SFA and omega 6:omega 3 ratio compared to control. Oil stability index also increased in 63 % of the genotypes under N80. Undesirable Erucic acid was found to increase in 58 % of the genotypes by 0.98% (DHR-991) to 38.31% (HB-9902) and in rest of the 42 % it reduced by 1.14 % (DRMR-IJ31) to 22.55 % (NRCDR-2) over control (N0).