板栗种仁脂肪含量及其脂肪酸组成_梁丽松 . Fat Content and Fatty Acid Composition of Chinese Chestnut (Castanea mollissima Blume) Kernels

Abstract

Tweenty-four cultivars of Chinese chestnut(Castanea mollissima Blume) collected from different growing regions and assigned to three major groups in China were tested in this study.Fat content and fatty acid composition of the kernels of these cultivars were determined on a dry matter basis to explore the differeneces among the single cultivars and among the groups.Fat content in the kernels of the 24 cultivars varied between 1.15 g/100 g and 4.48 g/100 g.Saturated fatty acids(SFA) and unsaturate fatty acids(UFA) with carbon chain length ranging from C14 to C20 were detected as main fatty acids,and among them C16and C18were the most predominant,which accounted for 7.35% to 25.81% and 64.51% to 91.83% of the total fatty acids,respectively,with a ratio of C16 to C18 ranging from 0.08 to 0.37.The most dominant C16 fatty acid was C16:0,and the most dominant C18fatty acids were C18:1and C18:2.SFAs represented a much lower percentage(9.64%-29.22%) of the total fatty acids than UFAs(70.78%–90.36%),with a SFA/UFA ratio of 0.11 to 0.41.To sum up,both fat content and fatty acid composition indicate significant differences among the kernels of different cultviars rather than among different groups.