基于相关性和主成分分析评价南瓜的营养品质

Evaluation of pumpkin nutrient quality based on correlation and principal component analysis

为评价南瓜品种果实品质,测定14个南瓜品种的果实外观性状、口感品质、营养成分和微量元素含量,并进行相关性分析和主成分分析。结果表明,果实还原糖含量(w,后同)为3.59~2.49 g·100 g^(-1);氨基酸含量为118.39~66.61 mg·100 g^(-1);水分含量为83.51%~90.31%;灰分含量为0.58%~1.84%;微量元素Ca含量最高(240.66μg·g^(-1)),Mn含量最低(4.88μg·g^(-1))。灰分与还原糖、水分含量存在显著负相关,与Ca含量存在极显著正相关。主成分分析综合得分最高品种是汕美2号,其次依次是优丰蜜本、兴蔬大果蜜本和金囷蜜本。试验结果可为今后南瓜品种评价及应用推广提供基本信息。

In order to evaluate the fruit quality of Cucurbita moschata Duchesn,the appearance traits,taste,nutrients and mineral elements of 14 pumpkin varieties were determined and summarized by its correlation analysis and principal component analysis.The results showed that the reducing sugar content of the fruit ranged from 3.59 g·100 g^(-1) to 2.49 g·100 g^(-1);the amino acid content ranged from 118.39 mg·100 g^(-1) to 66.61 mg·100 g^(-1);the water content was 83.51%~90.31%.The content of ash is between 0.58%and 1.84%.The content of Ca in mineral elements was the highest(240.66μg·g^(-1))and the content of Mn was the lowest(4.88μg·g^(-1)).There was a significant negative correlation between ash content and reducing sugar and water,and a significant positive correlation with Ca.Principal component analysis indicated that the best variety is Shanmei 2,followed by Youfeng Miben,Xingshudaguo Miben,and Jinqun Miben.