Evaluation of Juice Processing Characteristics of Mainly Blueberry Cultivars in Guizhou Province

Abstract:

Qiandongnan prefecture of Guizhou province has become largest organic blueberry production base in China，However，most of the species were harvested in high temperature and high humidity in July，seriously shorten the storage period of fresh fruit，brings the huge economic loss for the off-season. Juice processing properties of eight varieties from Qiandongnan Prefecture of Guizhou Province were analyzed in terms of appearance morphology，physical-chemical properties，nutritional components，antioxidant activity and juice characteristics by principal component analysis（PCA），and sorted the comprehensive grade. The results indicated that there was a certain degree of differences among different cultivars. The PCA results showed that the cumulative contribution proportion of the former five principal components was 85.509%，the first principal component is mainly fruit weight，a*，b*，pectin and protein；the second principal component is the longitudinal diameter，viscosity，reducing sugar，total phenolic and flavonoids content；the third principal component is titratable acid；the fourth principal component juice TSS；the fifth principal component is the juice yield and anthocyanin content. The comprehensive evaluation of the juice processing properties of 8 blueberry varieties was as followed：Tifblue，Premier，Bright Well，O'neal，Powderblue，Blue Rain，Climax，Gardenblue. Tifblue ，Premier and Bright Well is appropriate processing into juice and wine products.