Establishment of quality evaluation index system for table grape in Xinjiang_ | 新疆鲜食葡萄品质评价指标体系的建立__
2011
Yang Zhong, Xinjiang Analysis and Testing Academy, Urumqi (China) | Zhang Jing, Xinjiang Analysis and Testing Academy, Urumqi (China)
chinois. 分析测定了26个鲜食葡萄品种的单果重、果形尺寸、糖酸比、出汁率和蛋白质、维生素C、可溶性固形物（TSS）、可滴定酸（TA）含量及风味等加工品质指标，并对其进行主成分分析和聚类分析。结果表明，鲜食葡萄多个品质指标间存在相对独立性和密切相关性；经主成分分析，5个主成分的累计贡献率达89.02%，可反映鲜食葡萄品质的绝大部分信息；聚类分析结果表明，9个主要品质指标被聚为5类，最终将品质指标简化为出汁率和可滴定酸、维生素C、可溶性固形物含量及风味5个指标。
Afficher plus [+] Moins [-]anglais. The processing quality indexes of 26 table grape varieties were analyzed and determined, such as single fruit weight, fruit shape and size, sugar-to-acid ratio, juice yield and contents of protein, vitamin C (Vc), total soluble solid (TSS), titratable acid (TA) and flavor. And the principal component analysis and cluster analysis were performed on these indexes. The results showed that there were relative independentability and close relativity among many quality indexes of table grape. The results from principle comonent analysis showed that the accumulated contribution rate of 5 principle components was 89.02%, reflecting most information about the quality of table grape. The results from cluster analysis showed that the 9 major quality indexes were clustered into 5 categories and finally, its quality indexes were simplified to be 5 indexes of juice yield, TA, Vc, TSS and flavor. _
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