Glucosinolates, rapeseed

Canola Oil Canola oil is obtained from low erucic acid, low glucosinolate rapeseed. The unique polyunsaturated fatty acid and low saturated composition of canola oil differentiates it from other oils. It has a higher oleic acid (18 1) content (55%) and lower linoleic acid (18 2) content (26%) than most other vegetable oils, but it contains 8-12% of linolenic acid (18 3) (58). Canola oil is most widely used in Canada and is considered a nutritionally balanced oil because of its favorable ratio of near 2 1 for linoleic to linolenic acid content. Unlike most other edible oils, the major breakdown products of canola oil are the cis, trans- and tram, trans-2,4-heptadienals with an odor character generally described as oily, fatty, and putty. Stored canola oil shows a sharp increase in the content of its degradation products, which are well above their odor detection thresholds. The aroma is dominated by cis, tram-, tram, frani-2,4-heptadienals, hexanal, nonanal, and the cis, trans- and... 

A High-Erucic Acid, Low-Glucosinolate Rapeseed (HEAR) Cultivar Development in Canada... 

Low-Erucic Acid, High-Glucosinolate Rapeseed Cultivar... 

Canola meal is compared with a well recognized high quality standard meal, namely soybean meal in Tables XV and XVI. Recommended levels of feeding are compared with the high glucosinolate rapeseed meal In Table XVII. 

High-glucosinolate rapeseed meal Low-glucosinolate rapeseed meal... 

Amarowicz et al. (1994) studied the phenolic compounds of flaxseed meal extracted into 80% ethanol (v/v) by chromatographic techniques. Both hydrophilic and hydrophobic phenolic compounds were present. The separated hydrophilic fractions had a UV maximum absorption between 270 and 290 nm which was different from that observed for phenolic acids. Meanwhile, the tannin content of flaxseed meal was very low (125 to 137 mg/100 g of defatted meal) when compared to that of high glucosinolate rapeseed and canola (Shahidi and Naczk 1988 Shahidi et al., 1988 Wanasundara and Shahidi, 1994a). 

McVetty, P.B.E., Fernando, W.G.D., Tahir, M., Zelmer, C., 2009. High erucic acid, low glucosinolate rapeseed (HEAR) cultivar development in Canada. In Hou, C.T., Shaw, I.-F. (Eds.), Biocatalysis and Agricultural Biotechnology. Taylor and Frands, Boca Raton, Horida, pp. 43-62. 

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