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小檗科科尔切斯淫羊藿叶绿体全基因组研究

Complete chloroplast genome of Epimedium pinnatum Fisch. ex DC.(Berberidaceae)

  • 摘要: 小檗科科尔切斯淫羊藿(Epimedium pinnatum Fisch.ex DC.)是分布于高加索地区的一种具有观赏和药用价值的多年生草本植物。本研究首次报道了科尔切斯淫羊藿的叶绿体全基因组序列。结果显示:科尔切斯淫羊藿叶绿体基因组全长为156 155 bp,GC含量为38.82%;由一个大的单拷贝区(LSC,89 425 bp)、一个小的单拷贝区(SSC,16 284 bp)和一对反向重复区(IRa和IRb,25 223 bp)组成。叶绿体基因组包含112个基因,其中蛋白质编码基因78个,tRNA基因30个,rRNA基因4个。系统发育分析结果表明,Rhizophyllum亚属的科尔切斯淫羊藿与Epimedium亚属的Macroceras组最先聚为一支,并与Epimedium亚属的Diphyllon组形成的一支分开。

     

    Abstract: Epimedium pinnatum Fisch. ex DC.(Berberidaceae) is a perennial herb with ornamental and medicinal value distributed in the Caucasus region. In this study, the Illumina NovaSeq 6000 sequencing system was used to assemble the complete chloroplast genome sequence of E. pinnatum for the first time. Results showed that the total length of the chloroplast genome was 156 155 bp with 38.82% GC content, comprising a large single-copy region (LSC, 89 425 bp), small single-copy region (SSC, 16 284 bp), and pair of inverted repeat regions (IRa and IRb, 25 223 bp). The chloroplast genome of E. pinnatum contained 112 genes, including 78 protein-coding genes, 30 transfer RNA (tRNA) genes, and four ribosomal RNA (rRNA) genes. Phylogenetic analysis showed that E. pinnatum subgen. Epimedium and sect. Macroceras was clustered on a branch, which was separated from the branch composed of species from sect. Diphyllon, subgen. Epimedium. These results suggest that further study is needed to clarify the natural system of Epimedium based on more data.

     

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