Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (34): 76-81.doi: 10.11924/j.issn.1000-6850.casb2020-0439

Special Issue: 资源与环境 园艺

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Specificity Evaluation of Local Tea Germplasm Resources in Yunnan

SHANG Weiqiong(), DUAN Zhifen, DENG Shaochun, SUN Chengmian, YANG Yijian, LI Jinlong, XIA Rui(), LIU Benying   

  1. Tea Research Institute, Yunnan Academy of Agricultural Sciences/ Yunnan Key Laboratory of Tea Science/ Yunnan Tea Germplasm Resource Innovation and Cultivation Technology Engineering Research Center, Xishuangbanna, Yunnan 666201
  • Received:2020-09-09 Revised:2022-09-29 Online:2022-12-05 Published:2022-11-25
  • Contact: XIA Rui E-mail:1718046361@qq.com;317920139@qq.com

Abstract:

This study used 50 tea germplasms from different regions in Yunnan planted in National Large-leaf Tea Tree Resource Repository (Menghai) as the test materials, to determine and analyze the contents of tea biochemical components and screen specific resources. The results of the experiment showed that in the 50 tea germplasms from different regions of Yunnan, the content of tea polyphenols ranged from 20.35% to 33.02%, and the average content was 26.72%. The content of amino acids ranged from 1.95% to 4.20% with the average content of 2.99%. The caffeine content ranged from 2.03% to 5.17%, and the average content was 2.93%. The total amount of catechins was from 8.21% to 21.29% with the average content of 11.12%. In general, the 50 tea germplasms have high contents of tea polyphenols and amino acids. 32 tested germplasms belong to high tea polyphenols resource (tea polyphenols content≥25.0%), 26 belong to high amino acids resource (amino acid content≥3.0%), 1 belong to high caffeine resource (caffeine content≥5.0%), and 1 belong to high catechins resource (catechins content≥20.0%). The selected germplasm resources can be used for genetic improvement of tea tree.

Key words: tea, resource, specificity, Yunnan, evaluation

CLC Number: