Laboratory of Biochemistry, UR Human Nutrition and Metabolic Disorders, Faculty of Medicine, 5019 Monastir, Tunisia.
Chem Biodivers. 2010 Jul;7(7):1801-13. doi: 10.1002/cbdv.200900385.
Our study reports the triglyceride (triacylglycerol, TAG) composition of five new Tunisian virgin olive oil cultivars obtained through controlled crossings of the cultivar (cv.) Chemlali Sfax. These cultivars have been selected among a progeny of 500 olive descendants, based on an evaluation of the fatty-acid (FA) composition of their oils. Among these samples, two were derived from the crossing with the cv. Sigoise as pollinator (SM634) or pollen acceptor (SM1110) and the others from the crossing with the cv. Meski as pollen acceptor (SM513, SM514, and SM517). The five descendants were characterized by a good fat value, a balanced FA composition, and a high content of triolein, varying between 26.9 (SM514) and 45.46% (SM1110). They had an improved FA composition as compared to that of the cv. Chemlali Sfax and their fruits were slightly bigger. The principal component analysis suggested that the TAG variables were more suitable than the total FAs for an optimum classification of the cultivar samples analyzed. The cultivars obtained through the crossing with the cv. Sigoise (as pollen acceptor or pollinator) had a more favorable composition of FAs and TAG than those obtained through the crossing with the cv. Meski, which indicated that genetic factors had the most important influence on the quality of the virgin olive oils.
我们的研究报告了五种新的突尼斯初榨橄榄油品种的甘油三酯（三酰基甘油，TAG）组成，这些品种是通过对 Chemlali Sfax 品种进行控制杂交获得的。这些品种是从 500 个橄榄后代中选择出来的，其基础是对其油的脂肪酸（FA）组成进行评估。在这些样品中，有两个是由与 cv. Sigoise 作为授粉者（SM634）或花粉接受者（SM1110）的杂交产生的，其他三个是由与 cv. Meski 作为花粉接受者（SM513、SM514 和 SM517）的杂交产生的。这五个后代的特点是脂肪值良好、FA 组成平衡、三油酸酯含量高，介于 26.9（SM514）和 45.46%（SM1110）之间。它们的 FA 组成比 Chemlali Sfax 品种有所改善，而且果实略大。主成分分析表明，TAG 变量比总 FA 更适合对分析的品种样本进行最佳分类。与 cv. Meski 杂交获得的品种（作为花粉接受者或授粉者）的 FA 和 TAG 组成比与 cv. Sigoise 杂交获得的品种更有利，这表明遗传因素对初榨橄榄油的质量有最重要的影响。
