The complete plastid genome of Polygonatum gracile P. Y. Li (Asparagaceae): characterization and phylogeny.

Pub Date : 2024-10-30 eCollection Date: 2024-01-01 DOI:10.1080/23802359.2024.2421953

Wen-Ping Cheng, Jin-Hao Chen, Ming-Ying Zhang

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Abstract

Polygonatum gracile P. Y. Li is a perennial rhizomatous medicinal herb endemic to China with recognized medicinal value. Here, the first complete plastid genome of P. gracile is reported and characterized, and the phylogenetic relationships of P. gracile with other Polygonatum species are clarified by phylogenetic inferences based on complete plastid genome sequences. The complete plastid genome of P. gracile is 155,734 bp in length and exhibits the typical quadripartite circular structure consisting of a large single-copy (LSC, 84,385 bp) region, a small single-copy (SSC, 18,519 bp) region, and a pair of inverted repeat regions (IRa/b, 26,415 bp). A total of 112 unique genes, including 78 protein-coding genes, 30 tRNA genes, and four rRNA genes were identified. Seven protein-coding genes, eight tRNA genes, and four rRNA genes were duplicated in the IR regions. Phylogenetic reconstructions indicated that P. gracile belongs to sect. Verticillata and is most closely related to P. zanlanscianense Pamp. This study provides a basis for further phylogenetic reconstructions, conservation and utilization of Polygonatum species.

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Polygonatum gracile P. Y. Li（天门冬科）的完整质粒基因组：特征和系统发育。

芡实（Polygonatum gracile P. Y. Li）是中国特有的多年生根状茎药材，具有公认的药用价值。本文首次报道了芡实（P. gracile）的完整质粒基因组，并根据完整质粒基因组序列进行系统发育推断，明确了芡实与其他何首乌属植物的系统发育关系。芡实（P. gracile）的完整质粒基因组长度为 155,734 bp，呈现典型的四方环状结构，包括一个大的单拷贝区（LSC，84,385 bp）、一个小的单拷贝区（SSC，18,519 bp）和一对倒位重复区（IRa/b，26,415 bp）。共鉴定出 112 个独特基因，包括 78 个蛋白质编码基因、30 个 tRNA 基因和 4 个 rRNA 基因。在 IR 区域有 7 个蛋白质编码基因、8 个 tRNA 基因和 4 个 rRNA 基因重复。系统发育重建表明，P. gracile 属于sect.zanlanscianense Pamp.的亲缘关系最为密切。该研究为进一步的系统发育重建、何首乌物种的保护和利用提供了依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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