基于叶绿体基因组数据的芸香科属间系统发育初步分析(专题约稿)
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1.重庆文学院园林与生命科学学院;2.重庆文理学院

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国家自然科学(31901324);重庆市博士后研究项目特别资助(2021XM2010);重庆市教委青年项目(KJQN202201337;KJQN202101320;KJQN201801344)


Preliminary Analysis of Intergeneric Phylogenetic Analysis of Rutaceae Based on Chloroplast Genomes Data
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    摘要:

    该研究以芸香科物种的叶片为材料,使采用改良CTAB法提取叶绿体DNA,利用BGISEQ-500平台进行叶绿体基因组测序,并对叶绿体基因组进行组装、注释,联合NCBI数据库数据,共获得芸香科19属49个物种的全叶绿体基因组序列。经序列比对后,分别用ML和BI法构建了芸香科属间系统进化关系。发育树,以明确芸香科属间的亲缘关系以及花椒属与其近缘属的分子系统关系,为进一步探究花椒属下种间系统发育关系提供分子系统学证据。结果表明:(1)基于叶绿体基因组序列矩阵(总长196 641 bp),ML和BI 2种方法得到的系统发育树的拓扑结够基本一致,系统发育树各分具有较强的支持率高,叶绿体基因组数据可以解决芸香科属间的系统发育关系。(2)芸香科为单系类群,并进一步形成两大分支,其中柑橘亚科为单系,与芸香亚科内的芸香属聚为分支I,分支II由芸香亚科和飞龙掌血亚科组成,两亚科均不是单系,其中飞龙掌血亚科的香肉果属,茵芋属与芸香亚科的白鲜属,臭常山属是最早分化出来的类群,其次是蜜茱萸属和山油柑属;黄檗属和吴茱萸属与花椒属类群形成姊妹群,飞龙掌血属的物种飞龙掌血嵌套于花椒属分支中,支持飞龙掌血物种并入花椒属的处理。研究发现,基于叶绿体基因组数据构建芸香科属间系统发育关系,各分支支持率均较高,探索系统发育的意义足够可靠。该研究结果为进一步探究花椒属种水平系统进化关系以及新品种培育研究奠定了理论基础。

    Abstract:

    In this study, the leaves of Rutaceae species were used as materials, to extract the chloroplast DNA was extracted byusing modified CTAB method, and the chloroplast genome was sequenced by BGISEQ-500 platform, and the chloroplast genome was assembled and annotated. by BGISEQ-500 platform, Combined with NCBI database data, the whole chloroplast genome sequences of 49 species in 19 genera of Rutaceae were obtained. To clarify the phylogenetic relationships among Rutaceae and the molecular phylogenetic relationships between Zanthoxylum and its related genera after the sequence alignment, the phylogenetic trees of Rutaceae were constructed by ML and BI methods, respectively, and to provide molecular phylogenetic evidence for further exploration of the phylogenetic relationships of Zanthoxylum species. The results showed that: (1) based on the chloroplast genome sequence matrix (total length is 196 641 bp), the topological nodes of phylogenetic trees obtained by ML and BI methods were basically the same, with strong support for each branches. ,the chloroplast genome data can resolve the phylogenetic relationships of intergeneric in Rutaceae. (2) Rutaceae is a monophyletic group and further forms two branches, of which subfamily Aurantioideae is a monophyletic group and clustered with Ruta in Rutaceae into Clade I, Clade II is composed of Rutoideae and Toddalioideae, neither of which is monophyletic group. Among them, the monophyletic of Rutaceae was supported, and two major clades were formed, and within the clade I comprised an Aurantioideae lineage was sister to Ruta. Clade II consisted of Rutoideae and Toddalioideae, both of which are not monophyletic. Casimiroa and Skimmia of Toddalioideae and Dictamnus and Orixa of Rutoideae were the early-diverging clade, followed by Melicope and Acronychia. Phellodendron and Tetradium formed a clade sister to Zanthoxylum, Toddalia asiatica was nested in Zanthoxylum, and our the result supported the treatment of merging T. asiatica into Zanthoxylum. To sum up, the plastomes data were sufficiently robust to explore implications of the phylogeny for the previous phylogenetic hypotheses. The study provided a theoretical foundation for further research on the phylogenetic relationship of Zanthoxylum species level and the cultivation of new varieties.

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刘 涵,孙 冲,黄 威,等.基于叶绿体基因组数据的芸香科属间系统发育初步分析(专题约稿)[J].西北植物学报,2023,43(11):1866-1871

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  • 收稿日期:2023-04-01
  • 最后修改日期:2023-08-04
  • 录用日期:2023-09-01
  • 在线发布日期: 2023-11-14
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