食品科学 ›› 2019, Vol. 40 ›› Issue (17): 141-149.doi: 10.7506/spkx1002-6630-20190222-137

• 基础研究 • 上一篇    下一篇

基于主成分分析与聚类分析的中、早熟桃品种制汁品质评价

张春岭,刘慧,刘杰超,吕真真,杨文博,王力荣,焦中高   

  1. (中国农业科学院郑州果树研究所,河南?郑州 450009)
  • 出版日期:2019-09-15 发布日期:2019-09-23
  • 基金资助:
    中国农业科学院科技创新工程专项(CAAS-ASTIP-2019-ZFRI);河南省重点研发与推广项目(182102110035)

Evaluation of Juice Quality of Mid-Early Ripening Peach Varieties Based on Principal Component Analysis and Cluster Analysis

ZHANG Chunling, LIU Hui, LIU Jiechao, Lü Zhenzhen, YANG Wenbo, WANG Lirong, JIAO Zhonggao   

  1. (Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China)
  • Online:2019-09-15 Published:2019-09-23

摘要: 为了探讨桃果实品种和成熟度对出汁率和桃汁品质的影响,选择适宜的制汁品种,对15?个中、早熟桃品种3?个成熟度(I、II、III)果实的出汁率以及桃汁的糖、酸组分及质量浓度、总酚质量浓度、褐变度等15?个指标进行测定,运用描述性分析、主成分分析和聚类分析对桃汁品质进行综合评价。结果表明:不同品种和成熟度桃果实制备的桃汁品质差异较大。主成分分析一共提取了5?个主成分,反映了原变量80.333%的信息。第一、第二主成分主要综合了糖、酸质量浓度的信息;第三、第四主成分主要综合了出汁率和色泽的信息;第五主成分主要综合了总酚质量浓度和褐变度的信息。在第一主成分和第二主成分得分图上,综合得分排名较高和较低的品种可以明显区分;通过第一主成分和第三主成分得分图可以将3?个成熟度很好地区分。聚类分析将45?个样品聚为6?类,与主成分分析结果基本一致。在所有样品中,综合得分排名第一的是‘中油桃12号’-III,排名最后的是‘中桃1号’-I。整体而言,黄肉品种桃汁的综合品质较好,中熟品种优于早熟品种,成熟度高的原料制得的桃汁品质较好。

关键词: 品种, 成熟度, 主成分分析, 聚类分析, 制汁品质

Abstract: The purpose of this study was to investigate the effects of different varieties and maturities of peach on the yield and quality of peach juice and to select the optimal variety for juice processing. A total of 45 peach juices from 15 mid-early ripening cultivars harvested at 3 maturities (I, II and III) were measured for 15 quality indicators including sugar, acid, total phenols and browning degree and comprehensive evaluation of their quality was investigated by conventional descriptive statistics, principal component analysis (PCA) and cluster analysis (CA). The results showed that quality indicators varied significantly among different peach cultivars and maturities. A total of 5 principal components were extracted through PCA, which represented 80.333% of the total variability. The first and second principal components (PC1 and PC2) were related to total sugar and acid concentrations. The third and fourth principal components (PC3 and PC4) were related to juice yield and color. The fifth principal component was related to total phenolic concentration and browning degree. In the PC1 versus PC2 score plot, the cultivars with higher comprehensive scores were clearly separated from those with lower comprehensive scores. In the PC1 versus PC3 score plot, the three maturities were clearly discriminated. CA classified the 45 samples into 6 groups on the basis of the measured parameters and the results were consistent with the PCA. The white-fleshed nectarine cultivar ‘Zhongyoutao 12’ harvested at maturity III ranked first in terms of comprehensive score among all these samples, while the white-fleshed peach cultivar ‘Zhongtao 1’ harvested at maturity I ranked last. Overall, peach juice from the yellow-fleshed cultivars had better quality, and the mid-ripening varieties had better quality than the early-ripening varieties. The quality of peach juice was better at higher maturity levels.

Key words: cultivar, maturity, principal component analysis, cluster analysis, juice quality

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