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植物研究 ›› 2025, Vol. 45 ›› Issue (6): 873-887.doi: 10.7525/j.issn.1673-5102.2025.06.005

• 研究论文 • 上一篇    

柽柳科植物叶绿体基因组结构特征和系统发育

李佳欢1, 郑清清2, 关蓉蓉2, 刘玉萍1, 苏旭1, 张发起2,3()   

  1. 1.青海师范大学生命科学学院,西宁 810008
    2.西宁植物园,西宁 810008
    3.中国科学院西北高原生物研究所,西宁 810008
  • 收稿日期:2025-03-28 出版日期:2025-11-20 发布日期:2025-11-27
  • 通讯作者: 张发起 E-mail:fqzhang@nwipb.cas.cn
  • 作者简介:李佳欢(2000—),女,硕士研究生,主要从事植物遗传多样性研究。
  • 基金资助:
    青海省重大科技专项(2023-SF-A5)

Structure Characterization and Phylogeny of Chloroplast Genomes in Tamaricaceae

Jiahuan LI1, Qingqing ZHENG2, Rongrong GUAN2, Yuping LIU1, Xu SU1, Faqi ZHANG2,3()   

  1. 1.School of Life Sciences,Qinghai Normal University,Xining 810008
    2.Xining Botanical Garden,Xining 810008
    3.Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008
  • Received:2025-03-28 Online:2025-11-20 Published:2025-11-27
  • Contact: Faqi ZHANG E-mail:fqzhang@nwipb.cas.cn

摘要:

叶绿体基因组结构特征能够反映植物类群间的系统发育和进化关系。该研究通过Illumina高通量测序平台对7种柽柳科(Tamaricaceae)植物叶绿体基因组进行测序和组装,并与已发表的柽柳科及其近缘种叶绿体基因信息结合,分析其叶绿体基因组序列变异、结构特征、蛋白编码基因密码子偏好性和系统发育。结果显示:10种柽柳科植物叶绿体基因组结构均为四分体结构,全长为154 684~156 178 bp;叶绿体基因组组成相似,约130个基因,非重复基因约111个;GC含量和密码子使用偏好性均与典型的被子植物叶绿体基因组类似,检测到27~54个简单重复序列(SSR)位点,SSR位点偏向于A或T组成;系统发育分析结果支持将甘蒙柽柳(Tamarix austromongolica)、秀柏枝(Myrtama elegans)归入水柏枝属(Myricaria)。以上研究结果表明,10种柽柳科植物叶绿体基因组结构特征相似,部分物种存在差异,这可为分析柽柳科植物系统发育关系和鉴定提供依据。

关键词: 柽柳科, 叶绿体基因组, 序列特征, 系统发育

Abstract:

Structural characteristics of chloroplast genome could reflect the phylogenetic and evolutionary relationships among plants. In this study, the chloroplast genomes of seven species from Tamaricaceae were sequenced and assembled by the Illumina HiSeq platform. Combined with published chloroplast genome sequences from Tamaricaceae and its allies, we conducted comparative analyses of chloroplast genome sequence variation, structural characteristics, relative synonymous codon usage of protein-coding genes, and phylogenetic relationships. The results showed that the ten chloroplast genomes of Tamaricaceae exhibited a quadripartite structure, with a total length ranging from 154 684 bp to 156 178 bp. These chloroplast genomes contained approximately 130 protein coding genes, including 111 non-redundant genes. The GC content and relative synonymous codon usage(RSCU) were consistent with those of typical angiosperm chloroplast genomes. Moreover, we identified 27-54 simple sequence repeats(SSRs) in each genome, which are predominantly composed of A/T bases. Phylogenetic results supported Tamarix austromongolica and Myrtama elegans as members of Myricaria. The results revealed the conserved chloroplast genome structures across the ten Tamaricaceae species, with distinct interspecific variations that offer valuable information for resolving phylogenetic relationships and identifying species within this family.

Key words: Tamaricaceae, chloroplast genome, sequence characterization, phylogeny

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