Abstract
This work was conducted to study the oil content and some quality criteria of oil extracted from seven different sunflower hybrids growing under local environmental condition during seasonal 2012–2013. Three high-oleic hybrids (2031, 2033 and Olivko), two mid-oleic hybrids (A12 and A15) and two traditional hybrids (120 and 53) were studied to determine the oil content, some physicochemical properties, total tocopherol content, oxidative stability by Rancimat method at 100°C and fatty acid composition by GC. According to the results, the hybrids 2033, 2031 and A15 produced higher oil content (44.00, 43.30 and 38.79%, respectively) than other hybrids under study. Hybrids 2033, Olivko and 2031 had higher tocopherol content (445, 423, 419 ppm, respectively) than other hybrids. In contrast, significant differences (P ≥ 0.05) were noticed in oxidative stability and fatty acids composition. The hybrids 2033, Olivko and 2031 showed the higher oxidative stability (19.00, 17.50 and 17.00 h) and oleic acid (82.87, 82.11 and 81.40%) respectively. In conclusion, results indicated that the high-oleic and mid-oleic sunflower hybrids cultivated under Egyptian conditions gave higher quality oil.
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