Nutritional yield and oil quality of canola cultivars grown in NWFP [Pakistan]
2004
Khan, A.H. | Khalil, I.A. | Shah, H. (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Agricultural Chemistry)
Six cultivars of Canola (Brassica napus) oilseed (Bulbul, Dunkled, Rainbow, Oscar, Range and Range (local) were analyzed for crude protein and crude oil contents by the standard methods of AOAC. Fatty acids and total glucosinolates contents were determined by Near Infrared Reflectance (NIR) spectroscopy at Nuclear Institute for Food and Agriculture (NIFA), Peshawar, in 2001. The data revealed significant (P= 0.05) variations among the six cultivars in all the chemical constituents. Bulbul and Rainbow were the oil rich cultivars, containing more than 47% crude oil in the oven-dried seed. Range and Range (local) canola cultivars contained the less amount of oil (- 43%). However, Range (local) was protein rich cultivar. Oleic acid (18:1) content of the oil raid from about 60 to 65% and that of linolenic acid (18:3) from 9.6 to 11.5%. Oil of Oscar was better than all other cultivars with respect to oleic acid content. However, Rainbow was the best cultivar in terms of linolenic acid content in the oil. Glucosinolates content of the six cultivars tested was less than 30 muM g-1, which characterized these cultivars to be canola type Brassica. It was concluded that Bulbul and Rainbow were the best cultivars with respect to their oil content.
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