木通属21个种质油脂基本品质评价

比较木通属植物不同种质籽油品质的差异,综合评价不同种质的优劣,为其开发利用提供参考.以同一生境同一生长年限下的木通属植物为材料,分别测定并记录木通属植物21份种质的外形参数与产量性状,利用索氏提取法测定种子含油率,采用气相色谱法检测脂肪酸种类及含量,通过变异系数分析种间及种内种质的产量及品质差异.通过相关性分析、主成分...

Basic quality evaluation of 21 germplasm oils of Akebia

The aim is to compare the differences of seed oil quality among different germplasm of Akebia, and evaluate the quality of different germplasm comprehensively, so as to provide reference for its development and utilization. In this experiment, Akebia plants in the same habitat and growth years were used as materials. The shape and yield traits of 21 Akebia germplasm were measured and recorded. The oil content was determined by Soxhlet extraction method, and fatty acid types and contents were determined by gas chromatography. The yield and quality differences between species and within species were analyzed by coefficient of variation. Through correlation analysis, principal component analysis and grey correlation analysis, comprehensive analysis and evaluation were also carried out. Results showed that oil content, acid value, peroxide value, iodine value and saponification value of 21 accessions of Akebia were 33.86-47.08%, 2.64-11.72 KOHmg·g^-1, 0.03-0.38 g·100g^-1, 47.33-81.85 g·100g^-1 and 237.87-281.53 KOHmg·g^-1, respectively. The relative mass fraction of saturated fatty acids ranged from 13.56% to 18.51%. Oleic acid and linoleic acid were the main unsaturated fatty acids, and their relative mass fraction ranged from 45.75% to 66.17%. Differences were found among interspecific and intraspecific. The yield traits of Akebia trifoliate (Thunb) Koidz was significantly different, and that of Akebia trifoliatr (Thunb) Koidz.var. australis (Diels) Rehd was larger in oil quality. Correlation analysis showed that the fruit quality and shape index were correlated with some quality indexes of seed oil (single fruit quality was significantly negatively correlated with saturated fatty acids; fruit shape index was positively correlated with oil content, oleic acid, monounsaturated fatty acid, saponification value, and negatively correlated with peroxide value), and the higher the two, the higher the quality of seed oil. Principal component analysis and grey weighted correlation analysis showed that the best germplasm was Akebia trifoliatr (Thunb) Koidz.var. australis (Diels) Rehd (B1-B8). At the same time, S6 and S8 of Akebia trifoliate (Thunb) Koidz ranked above the middle in the two kinds of analysis, which was worthy of development and utilization. Fruit color and shape had little effect on the comprehensive quality of seed oil. The comprehensive quality of seed oil from B1 to B8, S6 and S8 was better, thus has higher utilization value.