Suitability Evaluation of Wine Brewing about Wild Apples Backcross Population in Xinjiang

The research group had bred the hybrid offspring of Xinjiang wild apples and the Gala apples by crossbreeding, and then obtained the red-heart series functional applethrough further backcross. The soluble sugar, titratable acid and soluble solids in 144 strains of wild apple backcross population in Xinjiang were determined.Using the correlation analysis, discriminant analysis, factor analysis, k-means clustering analysis and hierarchical analysis to establish the apple varieties brewing suitability evaluation technology.The content of soluble solid content, titration, cyanin, total phenol content and other four indexes were identified as an indicator of the suitability evaluation of apple varieties.All four indicators were divided into three levels, namely, low, medium and high, which were submissive or approximate to the normal distribution.The score standard of the 4 indexes was based on the index weight and the index grading standard.The accuracy of the discriminant which was about the suitability of wine making was very high, and the correct rate was 92.35% (model sample) and 93.41% (test sample). Through factor analysis, level analysis and discriminant analysis, 27 plants in 144 plants of red-heart series apple were found to be more suitable for wine making.