Abstract: In this study，a genome-wide analysis of TCP genes was performed in Camellia sinensis，including identification，chromosomal localization，gene structure，phylogenetic analyses and expression analysis in different organs. In all，thirty-six proteins were identified with typical TCP domains. The length of CDS is from 453 to 1 824 bp，and proteins’ length is from 150 to 607 aa（amino acids）.These identified CsTCP members were named as CsTCP1–CsTCP30. Phylogenetic and comprehensive bioinformatics analyses of these genes revealed that Camellia sinensis TCP family proteins could be classified into two classes（ClassⅠand ClassⅡ），which could be further divided into eight subgroups（A–H）. Among them，ClassⅠ are also known as PCF or TCP-P，and ClassⅡcan be clustered into CYC/TB1 and CIN types. Gene structures and conserved motif analysis of CsTCPs indicated that different types of TCP genes had undergone different evolutionary processes and the genes in the same clade had similar chromosomal location，gene structure，and conserved domains. Except for CsTCP21b the expression of all 35 CsTCP genes could be detected in tea leaves of different growth stages，and qRT-PCR experiments results revealed that the CsTCPs gene family exhibited distinct expression pattern in different tissues. GA3 and ABA treatments could promote or repress the expression of CsTCPs，significantly.

Key words: Camellia sinensis, TCP transcription factor, whole genome；phylogenetic analysis, qRT-PCR expression