| Oils were extracted from eight jujube pits,including Gongzao, Jinzao, Gutouzao, Beiyingzao, Chengtuozao, Dunhuangdazao, Tanzao and Jixinzao,and the composition and content of fatty acids in the eight jujube pit oils were detected. The results showed that 24 fatty acids were found in jujube pits oils including 13 saturated fatty acids and 11 unsaturated fatty acids. Saturated fatty acids mainly included palmitic acid and stearic acid, and unsaturated fatty acids mainly included oleic acid, palmitoleic acid.The content of unsaturated fatty acids of Chengtuozao pit oil was the highest and reached 84.55%. The contents of oleic acid and linoleic acid in Beiyingzao, Chengtuozao, Tanzao and Jixinzao pit oils were higher,while the contents of palmitic acid were higher in Gongzao, Jinzao, Gutouzao and Dunhuangdazao pit oils. The linolenic acid in Gongzao pit oil was the highest, reaching 3.57%. Meanwhile, the class analysis, principal component analysis and linear discriminant analysis showed that the fatty acid composition and content of jujube pit oils could be used to discriminate jujube pit oils cultivars, providing a new method for the classification and discrimination of different varieties of jujube and the research of jujube germplasm resources. |
