Fatty acids of canola Brassica campestris var candle seed and oils at various stages of refining

Fatty acids of oil of a current variety of canolaBrassica campestris var Candle, at 3 stages of commercial production and refining, were compared with authentic seed oils, and with the oil ofB. napus var Tower. The proportion ofcis- 9, cis- 12, trans- 15 andtrans- 9, cis-12, cis-lS-octadecatrienoates relative to the all-cis isomer was lower than that previously observed in processed oils. The minor C₁₄, C₁₅, C₁₇ fatty acids previously documented for Tower were also found in the same proportions in the Candle oil. The proportion of 22:1ω7 isomer (1.1% of a total 1.2% 22:1) was intermediate to that of a high erucic variety (0.9% out of 23% 22:1) and the very low 22:1 Tower (2.3% out of 0.1% 22:1). Thus the proportion of ω7 isomers is governed by total 22:1 present.