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茶叶科学 ›› 2024, Vol. 44 ›› Issue (3): 411-430.doi: 10.13305/j.cnki.jts.2024.03.009

• 研究报告 • 上一篇    下一篇

茶树大面白叶绿体基因组特征、密码子偏好性及其系统发育分析

尹明华1,2,3,4, 张嘉欣1, 乐芸1, 何凡凡1, 黄添慧1, 张牧彤1   

  1. 1.上饶师范学院生命科学学院,江西 上饶 334001;
    2.上饶农业技术创新研究院, 江西 上饶 334001;
    3.上饶师范学院马家柚产业研究院,江西 上饶 334001;
    4.上饶市药食同源植物资源保护与利用重点实验室,江西 上饶 334001
  • 收稿日期:2024-04-07 修回日期:2024-05-23 出版日期:2024-06-15 发布日期:2024-07-08
  • 作者简介:尹明华,女,教授,主要从事植物生物技术方面的研究,yinminghua04@163.com
  • 基金资助:
    国家自然科学基金项目(31960079、31860084、32060092),江西省现代农业产业技术体系建设专项(JXARS-13-赣东站),2022年上饶市科技专项项目(饶科发[2023]5号社发类,2022A008)

Genomic Characteristics, Codon Preference, and Phylogenetic Analysis of Chloroplasts of Camellia sinensis cv. ‘Damianbai’

YIN Minghua1,2,3,4, ZHANG Jiaxin1, LE Yun1, HE Fanfan1, HUANG Tianhui1, ZHANG Mutong1   

  1. 1. College of Life Sciences, Shangrao Normal University, Shangrao 334001, China;
    2. Shangrao Agricultural Technology Innovation Research Institute, Shangrao 334001, China;
    3. Majiayou Industry Research Institute of Shangrao Normal University, Shangrao 334001, China;
    4. Key Laboratory of Protection and Utilization of Medicinal and Edible Plant Resources in Shangrao City, Shangrao 334001, China
  • Received:2024-04-07 Revised:2024-05-23 Online:2024-06-15 Published:2024-07-08

摘要: 茶树大面白(Camellia sinensis cv. ‘Damianbai’)在1985年被全国农作物品种审定委员会认定为国家品种,其起源以及与其他茶树品种之间的进化关系尚不清晰。以茶树大面白为试验材料,采用高通量测序技术对茶树大面白叶绿体全基因组进行测序、组装、注释,采用生物信息学软件对其叶绿体的基因组特征、系统发育和密码子偏好性进行分析。结果表明,茶树大面白叶绿体基因组全长157 129 bp,为典型的四分体结构,包括1个LSC区(86 687 bp)、1个SSC区(18 282 bp)和2个IR区(包括IRa和IRb,均为26 080 bp)。大面白叶绿体基因组共注释到135个功能基因,包括90个CDS基因;8个rRNA基因和37个tRNA基因。共检测到52个SSR和50个Longrepeat,SSR只有A/T单核苷酸重复序列,Longrepeat只存在正向重复和回文重复2种类型。茶树大面白叶绿体基因组密码子使用偏性主要受自然选择的影响,受内部突变压力的影响小。茶树大面白叶绿体基因有14个最优密码子(AAU、GAU、UGU、AAA、UAA、GCA、GCU、GGU、CCU、GUA、CGU、CUU、AGU、UCU)。茶树大面白与凤凰单丛茶白银(Camellia sinensis isolated Baiyin cultivar Phoenix Dancong Tea,OL690374)亲缘关系较近。本研究分析了大面白茶树叶绿体基因组序列特征及系统发育进化关系,为加强茶树大面白种质鉴定及其资源多样性的开发利用提供了参考依据。

关键词: 茶树大面白, 叶绿体基因组, 序列特征, 密码子偏好性, 最优密码子, 系统发育分析

Abstract: ‘Damianbai’ was approved as a national tea cultivar by the National Crop Variety Approval Committee in 1985, but its origin and evolutionary relationship with other tea resources are still unclear. Using ‘Damianbai’ as the experimental material, high-throughput sequencing technology was used to sequence, assemble and annotate the entire chloroplast genome of ‘Damianbai’. In order to provide a basis for studying its phylogenetic evolutionary relationship, bioinformatics software was used to analyze the characteristics, phylogeny, and codon preference of its chloroplast genome. The results show that the chloroplast genome of the tea cultivar ‘Damianbai’ had a total length of 157 129 bp and was a typical tetrad structure, including 1 LSC region (86 687 bp), 1 SSC region (18 282 bp), and 2 IR regions (including IRa and IRb, both of which were 26 080 bp). A total of 135 functional genes were annotated in the chloroplast genome of ‘Damianbai’, including 90 CDS genes, 8 rRNA genes, and 37 tRNA genes. A total of 52 SSRs and 50 Longrepeat sequences were detected in the chloroplast genome of ‘Damianbai’. The SSRs had only A/T single nucleotide repeat sequences, while Longrepeat sequences had only two types: forward repeat and palindrome repeat. The codon usage bias in the chloroplast genome of tea cultivar ‘Damianbai’ was mainly influenced by natural selection, and was less affected by internal mutation pressure. The chloroplast gene of tea cultivar ‘Damianbai’ had 14 optimal codons (AAU, GAU, UGU, AAA, UAA, GCA, GCU, GGU, CCU, GUA, CGU, CUU, AGU, UCU). The Camellia sinensis cv. ‘Damianbai’ had a close genetic relationship with Camellia sinensis isolate Baiyin cultivar Phoenix Dancong Tea (OL690374). This study analyzed the chloroplast genome sequence characteristics and phylogenetic relationships of ‘Damianbai’, which provided a reference basis for strengthening the identification of tea cultivar ‘Damianbai’ and the development and utilization of its resource diversity.

Key words: Camellia sinensis cv. ‘Damianbai’, chloroplast genome, sequence characteristics, codon usage bias, optimal codons, phylogenetic analysis

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