湖北省地方审定茶树品种中儿茶素含量分析

Quantitative analysis of catechins in local registered tea cultivars in Hubei Province

以12个湖北省地方审定茶树品种为供试材料，采用高效液相色谱法（ HPLC ）检测分析8种主要儿茶素组分含量。结果表明，儿茶素各组分变异系数在19.73％～67.17％之间，变异幅度较大；非酯型儿茶素组分含量间的变化趋势不明显，而酯型儿茶素各组分含量大小为EGCG＞GCG＞ECG＞CG。基于儿茶素品质指数进行聚类分析显示，鄂茶1号、鄂茶8号、鄂茶10号3个茶树品种可以作为适制名优绿茶的品种；五峰212、五峰310、鄂茶3号、鄂茶6号4个茶树品种EGCG含量高，可用于开发特殊茶饮；鄂茶2号儿茶素品质指数最低，适制红茶，但其EGC和儿茶素总量最高，应在今后的生产和育种中善加利用。

The contents of 8 main catechins in 12 local registered tea cultivars in Hubei Province were determined by high performance liquid chromatography （HPLC）.The results showed that the variation coefficients of catechins＇ contents ranged from 19.73%to 67.17%.No significant trend was found within non-esterified catechins , while con-tents of ester catechins decreased in the order of epigallocatechin gallate （ EGCG ） 〉gallocatechin gallate （ GCG ） 〉epicatechin gallate（ECG）〉catechin gallate（CG）.According to the cluster analysis based on catechin quality in-dex, the varieties Echa 1, Echa 8 and Echa 10 were suitable for the production of high quality green tea .Wufeng 212 , Wufeng 310 , Echa 3 and Echa 6 with high EGCG level could be used for the development of special tea drinks . Echa 2 contained high EGC and total catechin level .Therefore, it was of great potential for the breeding and produc-tion of black tea .