Wild ancient tea trees have abundant genetic diversity, and they are the primary tea tree germplasmresource with high conservation and research value. In this study, 23 accessions of wild ancient tea treeresources were selected as test materials, and summer new shoots with one bud and two leaves were picked tomake steamed samples, and then, the authors analyzed the diversity of biochemical components includingwater extract, tea polyphenols, total free amino acid, caffeine, various catechins composition and so on. Theresults showed that water extract was between the range of 43.65% to 51.19%, and there were 21 accessions ofresources that contained high water extract（〉45.00%）. The tea polyphenols content was between the range of12.02% to 38.60%, and there were 16 accessions with high tea polyphenols（〉25.00%） materials. The variationof amino acids was between the range of 1.46% to 3.41%, the caffeine was between the range of 2.17% to4.91%, the total catechins was between the range of 15.52% to 25.89%, the non-esters catechins was betweenthe range of 5.09% to 9.84%, the esters-catechins was between the range of 5.02% to 16.57%, and the EGCGvariation was between the range of 2.87% to 10.01%, with 4 high EGCG（8.00%） accessions of resources.Except the tea polyphenols and the amino acid, the phenol ammonia could also be used as a biochemical indexof tea varieties＇ processing suitability. In the primary selection, 5 accessions of resources were optimum tomake green tea, 11 were optimum to make black and green tea, and 7 were optimum to make black tea. The 23 accessions of the tested wild ancient tea tree resources contained abundant biochemical components, and couldbe used as important resources for a further in-depth study, as well as for a targeted development of tea varietycultivation.
Chinese Agricultural Science Bulletin
wild ancient tea tree