Selection of Quality Indicators and Factor Analysis for Fruit Quality Evaluation of Ziziphus jujuba var.spinosa Germplasms
In order to establish suitable methods to evaluate jujube quality and consequently guide the development and utilization of wild jujube germplasms and the selection of excellent germplasms,evaluation and classification of 16 fruit quality attributes such as single fruit weight,pericarp color,soluble sugar,titratable acid,vitamin C,fruit shape index,and single stone weight were carried out on 50 germplasms of Ziziphusjujuba var.spinosa by factor analysis and cluster analysis using SPSS software.The results showed that factor analysis extracted 6 main factors including single fruit weight,single stone weight,appearance and nutrients,with a cumulative variance contribution rate of 83.173％.Principal component analysis and cluster analysis were carried out using the loadings of the first 6 principal components.Pericarp color,single fruit weight,titratable acid (or vitamin C),single stone weight,fruit shape index (or starch content),and soluble sugar content were selected for cluster analysis of Ziziphus jujuba var.spinosa germplasms.When the squared Euclidean distance was 14.0,the 50 germplasms could be classified into 4 categories.The first category had better fruit color with higher acidity,the second one had larger fruits with higher proportion of edible part,and the third one contained higher sugar contents.
国家科技期刊平台
NSTL
万方数据
维普
