Variety Selection of Higher Methylated Catechin Content Germplasm Resources and Studies of the Diversity of Taiwan Tea Cultivars Based on Total Catechins and Their Fractions

• Main Authors: Cheng Chang, 張捷
• Other Authors: Shih-Chieh Lee
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/96333988107416093288

碩士 === 大葉大學 === 生物產業科技學系 === 98 === Using pan-fried green teas made from Taiwan as main teas in spring and autumn seasons, analysis and comparison their contents of catechins and catechin methyl ester, identify tea varieties containing high levels of catechin methyl ester, establishment the data of Taiwan's tea of catechins. According to principal component analysis and UPGMA method, evaluate season, suitability, catechins of tea varieties such as relevance. Evaluate content in distribution of catechins when selection breeding at different times of extension station of Taiwan and all teas species varieties.The results indicated that the autumn tea catechins were higher than the spring tea, but other than EGCG；Teas of Taiwan Tea Extension Station (TTES) No. 1 to 20, all have higher EGCG and total catechins contents than that from other tea varieties; partially fermented tea varieties have a higher content of catechin methyl ester. For TD004 (TTES No.4), its catechin methyl ester in spring and autumn has the average content of 3.3(g/100g d.w.). The highest mean average content of EGCG3 "Me was TD064 (Woan Joong), which has the highest concentrations of 1.6 (g/100g dw). Using the UPGMA method MVSP software to do cluster analysis on the tea species. The catechin profiles for TD007, TD085, TD093, TD100 are unique and not able to be grouped with most of the other tea varieties based on principal component analysis (PCA) and cluster analysis. PCA results also indicated that the parameters such as tea manufacturing suitability, the type of tea varieties released by TTES along the timeline, catechin content are related. Our results also indicated that wild teas in Taiwan have very different catechins content profiles in cluster analysis.The results in present research have established a germplasms database of teas in Taiwan and those data can be used to better serve the future of tea breeding.