The seeds subject to the analysis were obtained from the average seed material obtained from the hybrids grown in a comparative experiment on varieties. Subject of the experiment were the German “00” type of hybrids (canola), Sitro, Fines, Merano, Abakus and Hornet. The experiment was carried out in the experimental field of the “Plant-growing” department at the Agricultural University – Plovdiv in the period 2008 – 2010, by the block method with four replications and size of the yield plot 20 m2. The content of fats and fatty-acid composition of the five experimental hybrids were determined. The oil content was determined in accordance with the residue method using a Soxhlet apparatus, while that of the fatty acids – through extraction. The results showed that the hybrid Sitro was characterized by the lowest content of fats – 35.3%. Fines and Merano were reported to have almost equal content of fats (40.8%; 40.3%). The quantity of the saturated fatty acids in the oil of the tested hybrids was comparatively low – from 9.4% to 10.1% and it can be used for foods without a problem. The quantity of the unsaturated fatty acids in the oil of the tested rapeseed hybrids varied from 89.9% in Sitro to 90.6% in Мerano. The content of oleinic acid varied from 66.3% in Àbakus, to 73.6% in Sitro. All tested hybrids did not contain the harmful erucic acid.
Fatty acid composition of several oilseed winter Rapeseed hybrids cultivated in Central South Bulgaria