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Sequencing of cDNA clones and analysis of the expressed sequence tags (ESTs) of tea plant [Camellia sinensis (L.) O. Kuntze] young shoots

Published online by Cambridge University Press:  13 June 2008

Zhao Li-Ping
Key Laboratory of Tea Chemical Engineering, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
Gao Qi-Kang
Analyzing and Measurement Center, Zhejiang University, Hangzhou 310029, China
Chen Liang*
Key Laboratory of Tea Chemical Engineering, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
*Corresponding author. Email:


The construction of two cDNA libraries from young shoots of tea plant [Camellia sinensis cv. Longjing 43 and Anji Baicha], the sequencing of Longjing 43 cDNA clones and the analysis of expressed sequence tags (ESTs) are reported. Totally, 4320 clones from the cDNA library of Longjing 43 were sequenced, and 2963 useful sequences were obtained, corresponding to 68.6% of clones. A total of 416 clones shorter than 150 bp and 863 repeated clones were excluded, the first 1684 valid tea plant ESTs were generated. Most of the ESTs were between 300 and 700 bp, with an average of 478 bp. Six hundred and seven ESTs with known function or putative function were identified by BlastN searches against the National Center of Biotechnology Institute (NCBI) non-redundant nucleotide databases, corresponding to more than 130 functional genes in the tea plant. The rest, 1077 ESTs, were novel gene partial or full sequences. The results indicated that EST sequencing was a rapid and effective approach to identification of novel functional genes for tea plant.

Research Article
Copyright © China Agricultural University and Cambridge University Press 2005

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