Complete chloroplast genome of two Arabis L. species from Korea and assessment of their phylogenetic relationship in plastome based phylogeny

Pub Date : 2024-04-01 DOI:10.1016/j.japb.2024.03.001

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Abstract

Arabis stelleri DC. and A. takesimana Nakai belong to the family Brassicaceae. Arabis stelleri is widely distributed in East Asia, and A. takesimana is a Korean endemic plant. In this study, we report the complete chloroplast genomes of both species, measuring 153,577 bp for A. stelleri and 153,557 bp for A. takesimana. The plastome of A. stelleri comprises two inverted repeats (IRs) of 26,421 bp, a large single-copy (LSC) region measuring 82,705 bp, and a small single-copy (SSC) region of 18,030 bp. Whereas A. takesimana has IR regions of 26,426 bp, an LSC of 82,694 bp, and an SSC of 18,011 bp. Both the plastomes contain 131 total genes, 86 protein-coding genes, 37 tRNA genes, 8 rRNA genes, and 36.4% GC content. The organization and gene content of both plastomes were found to be similar to previously reported Arabis plastomes. In addition, we have tested the phylogenetic position of both the Arabis species and the relationship of the genus Arabis with other Brassicaceae members in comprehensive family-level plastome-based phylogeny. Arabis stelleri and A. takesimana are phylogenetically placed within the Arabis clade and show a close relationship to A. flagellosa, A. nipponica, A. paniculata, and A. hirsuta.

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韩国两个Arabis L.物种的完整叶绿体基因组及其基于质体的系统发育关系评估

Arabis stelleri DC.和 A. takesimana Nakai 属于十字花科。Arabis stelleri广泛分布于东亚，而A. takesimana是韩国特有植物。在这项研究中，我们报告了这两个物种的完整叶绿体基因组，其中A. stelleri的基因组长度为153,577 bp，A. takesimana的基因组长度为153,557 bp。A.stelleri的质粒体包括两个26,421 bp的倒位重复序列（IR）、一个82,705 bp的大单拷贝（LSC）区和一个18,030 bp的小单拷贝（SSC）区。而 A. takesimana 的 IR 区为 26,426 bp，LSC 区为 82,694 bp，SSC 区为 18,011 bp。两种质粒都含有 131 个总基因、86 个蛋白质编码基因、37 个 tRNA 基因、8 个 rRNA 基因，GC 含量均为 36.4%。这两个质粒的组织结构和基因含量与之前报道的 Arabis 质粒相似。此外，我们还在基于质体的综合科级系统发育中检验了Arabis种的系统发育位置以及Arabis属与其他十字花科植物的关系。在系统发育上，Arabis stelleri和A. takesimana被归入Arabis支系，并与A. flagellosa、A. nipponica、A. paniculata和A. hirsuta关系密切。

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