生物技术进展 ›› 2024, Vol. 14 ›› Issue (2): 237-247.DOI: 10.19586/j.2095-2341.2023.0133

• 研究论文 • 上一篇    

毛叶悬钩子和云南悬钩子叶绿体基因组比较分析

胡康1,2(), 于丽平1,2, 谷薇1, 贺志敏1,2, 张峻鑫1,2, 刘子璇1,2, 黄体冉1,2,3(), 杨明峰1,2()   

  1. 1.北京农学院生物与资源环境学院,北京 102206
    2.北京农学院,农业农村部华北都市农业重点实验室,北京 102206
    3.中国科学院大学生命科学学院,北京 100049
  • 收稿日期:2023-10-23 接受日期:2023-11-29 出版日期:2024-03-25 发布日期:2024-04-17
  • 通讯作者: 黄体冉,杨明峰
  • 作者简介:胡康 E-mail: gan9933@163.com
  • 基金资助:
    北京市属高等学校高水平教学创新团队建设支持计划项目(BPHR20220211);北京农学院2020年和2021年本科生科研训练项目

Comparative Analysis of Chloroplast Genomes from Rubuspoliophyllus and Rubus yunanicus

Kang HU1,2(), Liping YU1,2, Wei GU1, Zhimin HE1,2, Junxin ZHANG1,2, Zixuan LIU1,2, Tiran HUANG1,2,3(), Mingfeng YANG1,2()   

  1. 1.College of Biological and Resource Environment,Beijing University of Agriculture,Beijing 102206,China
    2.Key Laboratory for Northern Urban Agriculture of Ministry of Agriculture and Rural Affairs,Beijing University of Agriculture,Beijing 102206,China
    3.College of Life Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2023-10-23 Accepted:2023-11-29 Online:2024-03-25 Published:2024-04-17
  • Contact: Tiran HUANG,Mingfeng YANG

摘要:

毛叶悬钩子(Rubus poliophyllus)和云南悬钩子(Rubus yunanicus)隶属于蔷薇科(Rosaceae)悬钩子属(Rubus)的尖叶亚组(Subsect. Acuminati),二者的形态特征和地理分布较为相似,因此难以分辨。通过Illumina高通量测序技术得到了二者的叶绿体基因组序列,并对序列进行过滤、组装、注释和分析,构建了基于叶绿体基因组序列的系统发育树。结果表明,毛叶悬钩子和云南悬钩子的基因组全长分别为156 298 bp和156 299 bp,基因组序列总GC含量均为37.2%。均检测到159个叶绿体基因,其中蛋白质编码基因104个,tRNA 基因45个,rRNA 基因10个。毛叶悬钩子和云南悬钩子均含有17个回文重复序列,正向重复序列个数分别为19、17,反向重复序列分别为4、3。二者的同义密码子使用度 (relative synonymous codon usage,RSCU)>1.00的密码子均有32个,密码子偏好以A/U结尾,有效密码子数均大于45。根据叶绿体全基因组及筛选到的rpoC1-rpoB基因序列所构建的系统发育树显示,毛叶悬钩子和云南悬钩子均聚为同一个分支,表明二者具有较近的亲缘关系。研究结果可为毛叶悬钩子和云南悬钩子的物种分子鉴定、遗传多样性研究及其系统发育关系提供理论依据。

关键词: 毛叶悬钩子, 云南悬钩子, 叶绿体基因组, 密码子偏好性, 系统发育

Abstract:

Rubuspoliophyllus and R.yunanicus belong to the Rubus subsect. Acuminati(Focke)T.T.Yu & L.T.Lu of Rosaceae. They have similar morphological characteristics and geographical distribution. So it is difficult to distinguish them only by morphological characteristics. In this study, their chloroplast genome sequence were obtained by high-throughput sequencing technology of Illumina, and the sequences were filtered, assembled, annotated and analyzed. Then the phylogenetic tree based on chloroplast genome sequence was constructed. The results showed that the complete chloroplast genomes size of R. poliophyllus and R. yunanicus were 156 298 bp and 156 299 bp, and the GC content of the two species was 37.2%. One hundred and fifty-nine chloroplast genes were detected, including 104 protein-coding genes, 45 tRNA genes and 10 rRNA genes respectively. The number of palindromic repeats, direct repeats, reverse repeats between R. poliophyllus and R. yunanicus were 17, 17; 19, 17; 4, 3, respectively. There were 32 codons with relative synonymous codon usage (RSCU)>1.00 in the these two species. The codon preference ended with A/U, and the effective number of codons were greater than 45. Phylogenetic analysis based on the chloroplast geneme and the rpoC1-rpoB gene sequence showed that R. poliophyllus and R. yunanicus were clustered into the same clade, which indicated that they had a closely genetic relationships. This study will provide a theoretical basis for the molecular identification, genetic diversity and phylogenetic relationships of R. poliophyllus and R. yunanicus.

Key words: Rubus poliophyllus, Rubus yunanicus, chloroplast genome, codon bias, phylogenetic analysis

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