26份武夷名丛茶树种质资源秋茶生化成分多样性分析

Diversity Analysis of Biochemical Components in Autumn Shoots of 26 Wuyi Mingcong Tea Plant Germplasm Resources

为深入研究武夷山茶树种质资源,对2 6份武夷名丛的秋茶生化成分进行了评价鉴定和遗传多样性分析。结果表明,2 6份武夷名丛的生化成分具有丰富的遗传多样性和变异性,平均遗传多样性指数为1.8 7,平均变异系数为1 9.3 5%。通过多变量的主成分分析,前4个主成分代表了2 6份资源生化成分多样性9 1.8 1%的信息。基于生化成分,把2 6份资源聚类划分为3个类群,3个类群除了咖啡碱和水浸出物含量差异不显著外,其他生化成分间均存在显著差异。第Ⅰ、Ⅲ类群大部分为适制乌龙茶的资源,第Ⅱ类群为适制红茶的资源。初步筛选出茶多酚含量特异的种质2份(J M 0 0 3和J M 0 0 8)、水浸出物含量特异的种质2份(J M 0 2 2和J M 0 1 5)。

Biochemical components and genetic diversity in autumn shoots were analyzed in 26 Wuyi Mingcong tea germplasms from Wuyi mountain tea area to further study tea germplasm resources in Wuyi mountain. The results showed that the biochemical diversity and variation were high in 26 Wuyi Mingcong tea germplasms. The average diversity index and coefficient of variation were 1.87 and 19.35 %, respectively. In principal component analysis, the first four principal components represented 91.81% of the biochemical diversity. Based on the biochemical data, 26 Wuyi Mingeong were clustered into 3 groups. In addition to the caffeine and water extracts content, other bio- chemical components exist significant difference of 3 groups. The cluster analysis showed that 26 Wuyi Mingcong were clustered into 3 groups. In addition to the caffeine content, other biochemical components exist significant difference of 3 groups. Most of the tea germplasms in the first and the third group suited to be processed Oolong tea. The tea germplasms in the second group suited to be pro- cessed green tea. 2 specificity resources with high tea polyphenols content （JM003 and JM008）, 2 specificity resources with high water extracts content （JM022 and JMO15）.