Analysis of quality changes of six kiwifruit varieties during fruit development
To systematically analyze the quality changes of kiwifruit during its development,13 main quality indicators at different fruit development stages of six kiwifruit varieties locally cultivated in Fengxin County were measured,and evaluated by principal component analysis and cluster analysis.The results showed that the fruit shape of Jinkui,Xuxiangand Wanhong was oblate,and that of Jinguo,Cuixiang,Miliang No.1 was oblong.The total soluble solid content and starch content of six kiwifruit varieties gradually increased with fruit development,total soluble solid content reaching 6.7％-7.5％at harvest stage,with no significant differences among 6 varieties.The starch content of Wanhong reached 293.55 mg·g-1 at harvest time,signif-icantly higher than that of other varieties.The content of titratable acid increased at first and then decreased.Citric acid was the most accumulated organic acid component in the six kiwifruit varieties at harvest time,and the citric acid content of Miliang No.1 was significantly higher than that of other varieties.The flavonoids content and total phenolic content decreased rapidly with fruit development.The flavonoids content of each va-riety of kiwifruit was stable at 75-85 mg·g-1,and the total phenolic content was 0.86-0.96 mg·g-1.The results of principal component analysis and cluster analysis showed that the change rule of all quality indi-cators of six kiwifruit fruits during development had similar characteristics.The starch content,quinic acid content and malic acid content were the core indicators of kiwifruit quality analysis.The starch content could be used as a key indicator to measure whether the kiwifruit meets the harvesting standards.
万方数据
维普
