热带作物学报2026，Vol.47Issue(2)：313-324,12.DOI:10.3969/j.issn.1000-2561.2026.02.004
槠叶齐茶树叶绿体基因组特征与进化分析
Chloroplast Genome Characteristics and Evolutionary Analysis of the Tea Plant Variety Zhuyeqi
摘要
Abstract
This study represents sequencing of the chloroplast genome of the tea plant variety Zhuyeqi,with a focus on analyzing its structural characteristics,codon usage bias,and phylogenetic relationships.The results revealed that its chloroplast genome had 157 072 bp,with 135 functional genes annotated.The GC content in the IR region was found to be the highest(42.96%),and several intron-containing genes,such as clpP and ycf3,were identified.Codon usage bias analysis indicated a relatively weak bias,primarily driven by natural selection(contribution rate of 86.6%).Optimal codons were mostly A/U-ending,deviating from expectations based on mutational pressure.Phylogenetic analysis fur-ther confirmed that Zhuyeqi formed a highly supported monophyletic clade with cultivated types such as Pu-erh tea and Baihao tea,demonstrating close maternal genetic relationships.This study would provide important insights into the evolution of Theaceae species and the functional optimization of chloroplast genomes.关键词
茶树/槠叶齐/叶绿体基因组/密码子使用偏好性/系统发育Key words
Camellia sinensis/Zhuyeqi/chloroplast genome/codon usage bias/phylogenetic analysis分类
农业科技引用本文复制引用
曾文娟,张其湘,贺宁,刘雅,龚意辉,陈致印..槠叶齐茶树叶绿体基因组特征与进化分析[J].热带作物学报,2026,47(2):313-324,12.基金项目
湖南省科技创新计划项目(No.2024RC8289) （No.2024RC8289）
国家级大学生创新创业训练项目(No.202510553020X) （No.202510553020X）
省级大学生创新创业训练项目(No.S202510553039). （No.S202510553039）
