普洱地区茶树种质资源茶多酚组成的聚类分析

Cluster Analysis of Tea Polyphenols Compositions in Camellia sinensis Germplasm Resources in Puer District of Yunnan Province

高效液相色谱检测了普洱地区35个茶树(C.sinensis var.assamica(Masters)Kitamura)种质资源,包括20份古茶树资源,7个新选育品系、3个地方群体种、4个特异种质资源和对照品种(云抗10号),一芽二叶春梢中茶多酚各组分含量,并根据各组分相对含量对其进行了聚类分类。结果表明,所有种质资源可根据EGCG相对含量(EGCG占总多酚的比例)分为两大类群,即高EGCG类群(EGCG相对含量30.5%以上)和低EGCG类群(EGCG相对含量30.5%以下),高EGCG类群包括4个小群体,其中一个小群体的3个材料含有高含量EGC和高含量总多酚,可以用来选育优质红茶品种;另一小群体的6个材料茶多酚组成与云抗10号接近,可以用于选育适制红茶和普洱茶的茶树品种。

Teapolyphenols components in shoot with two leaves and a bud of 35 tea plant （C. sinensis var. assamica （Masters） Kitamura） germplasm resources in Puer district, including 20 ancient tea plant germplasm resources, 7 new collected lines, 3 local groups, 4 specific germplasm resources and a control cultivar＂Yunkang 10＂, were detected by high performance liquid chromatography （HPLC）, and their relative contents were analyzed by cluster analysis. The results showed that all germplasm resources could be divided into 2 groups according the relative contents of EGCG, one contained high content （more than 30.5%） of EGCG, and the other contained low content （less than 30.5%） of EGCG. The high EGCG group could be divided into 4 subgroups, one of them included 3 germplasm resources which contained high content EGC, low content ECG and high content of total ployphenols, could be used for producing high-quality black tea. The teapolyphenols components in another subgroups which including 6 germplasm resources were similar to teapolyphenols components in control cultivar＂Yunkang 10＂, indicated those germplasm resources could be used for producing black tea or Pu＇er tea.