Principal Component Analysis of Quality Indexes of Different Varieties of Actinidia arguta

In order to provide the research foundation for rational development and utilization of Actinidia arguta, by comparing and analyzing indexes of appearance and nutrition of the different varieties of Actinidia arguta, the appearance quality and nutrient component of 8 kinds of Actinidia arguta from same cultivated land of Liaoning province were measured by Chinese standard method and its 13 quality indexes were evaluated by principal component analysis. The results indicated that there were different quality among different kinds of Actinidia arguta. The variable coefficient of value of chromatism, fruit shape index, titratable acid, combined total flavonoids were large. LD241 had the maximum color saturation and the chromatic value was 4.724. The maximum value of the fruit shape index was 1.779 from big Longer. The highest content of titratable acid was 2.68 mg/100 g from Jinxiangyu. The highest content of flavonoids was 85.01 mg/100 g from wild fruit. The principal component analysis showed that the first principal component was determined by 2, 2-diphenyl-1-picrylhydrayl, flavonoids, vitamin C and so on, which showed significant antioxidant properties. The second principal component was mainly determined by titratable acids, which showed flavor and processing characteristics. The third principal component was mainly determined by soluble solids, which showed nutritional characteristics. The fourth principal component was determined by the color value, which showed appearance quality. The value of its cumulative variance contribution rate was as high as 91.962%.Therefore, the principal component analysis could be regarded as a good method to evaluate the different Actinidia arguta high-quality features.