关键词: 苹果, 可溶性糖, 组分, 含量, 特性

Abstract: Contents of soluble sugars in fruit of 132 apple cultivars were determined by Ion Chromatography. Statistical methods（such as frequency analysis，correlation analysis，and regression analysis）were used to clarify the level of each index and its distribution，the variation tendency between indexes，and the quantitative relationships between/among indexes. The results showed that fructose was the most dominant soluble sugar in apple，the second one was sucrose and glucose，and the last one was sorbitol. In fruit of about 4/5 apple varieties studied，content of surcose was higher than that of glucose. The discrete degree of content of soluble sugars in apple was sorbitol > glucose > sucrose > fructose. Five indexes of apple（including fructose content，sucrose content，sweetness value，TSS，and SS）distributednormally. Glucose content and sorbitol content of apple also distributed normally if a few varieties were removed from the samples. Between fructose and sweetness，as well as between TSS and SS，there were significant linear functions with correlation coefficient of 0.9450 and 0.8797 respectively. In apple，both TSS and SS had multiple linear regression models concerning some other indexes with high fitting precision and high prediction accuracy.

Key words: apple, soluble sugar, component, content, characteristic