Genetic analysis of main components of soluble sugar in the fruits of F1 progeny of'Huanongzao'longan ×'Ziniangxi'lychee
The type and content of soluble sugar is one of the important factors to determine the fruit quality and flavor.In order to study the inheritance of soluble sugar production in the fruit of longan and lychee hy-brid,the soluble sugar components and contents of'Huanongzao'longan,'Ziniangxi'lychee and their 68 F1 hybrids were determined by high performance liquid chromatography(HPLC).The results showed that the soluble sugars in the fruits of hybrids were mainly glucose,fructose and sucrose.The sucrose content was the highest,with an average of 67.66 mg/g,accounting for 51.79％of total sugar.The content of glucose and fructose was similar,accounting for 22.15％and 24.82％of total sugar,respectively.The different sugar components of the F1 hybrid population showed recession variation.The contents of glucose,fructose and su-crose were widely segregated,and the coefficients of variation(CV)were 25.16％,22.15％and 33.69％,re-spectively.The ratio of sucrose to monosaccharide was 0.48-3.05.There were significant positive correla-tions between sucrose and total sugar content,total sugar content and sweetness value.The total sugar con-tent in some F1 lines exceeded 170 mg/g,and the sweetness value exceeded 170,showed a characteristics of high sugar content.This study provided rich materials for improvement of longan variety with high-quality.
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