The complete chloroplast genome sequence and phylogenetic analysis of Hordeum pusillum Nutt., 1818 (Poaceae).

Pub Date : 2024-10-07 eCollection Date: 2024-01-01 DOI:10.1080/23802359.2024.2412225

Qingwei Du, Suping Yu

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Abstract

Hordeum pusillum (Hordeum pusillum Nutt., 1818) is an annual barley that is native to the west of the North America and widespread in southern United States and tropical America. In this study, we have provided the first complete characterization of the chloroplast genome of H. pusillum. Our research revealed that the circular chloroplast genome of H. pusillum consists of a large single-copy region (LSC: 80,853 bp), a small single-copy region (SSC: 12,745 bp), and a pair of inverted repeat regions (IRs: 21,587 bp), totaling 136,772 bp in length. Within the chloroplast genome of H. pusillum, 91 protein-coding genes, 38 tRNA genes, and ten rRNA genes were identified. To determine the evolutionary relationship of Hordeum species with reported chloroplast genome sequences, we constructed a phylogenetic tree using the entire chloroplast genome sequences. The evolutionary position of H. pusillum corresponds to its geographical location. The chloroplast genome of H. pusillum provided in this study may have significant implications for the phylogenetic study of Poaceae species.

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Hordeum pusillum Nutt., 1818 (Poaceae) 的完整叶绿体基因组序列和系统发育分析。

Hordeum pusillum（Hordeum pusillum Nutt.，1818）是一种一年生大麦，原产于北美西部，广泛分布于美国南部和美洲热带地区。在这项研究中，我们首次完整地描述了 H. pusillum 的叶绿体基因组。我们的研究发现，H. pusillum 的环形叶绿体基因组由一个大的单拷贝区（LSC：80,853 bp）、一个小的单拷贝区（SSC：12,745 bp）和一对倒位重复区（IRs：21,587 bp）组成，总长度为 136,772 bp。在 H. pusillum 的叶绿体基因组中，确定了 91 个蛋白质编码基因、38 个 tRNA 基因和 10 个 rRNA 基因。为了确定已报道叶绿体基因组序列的角豆属物种的进化关系，我们利用整个叶绿体基因组序列构建了一棵系统进化树。H. pusillum的进化位置与其地理位置相对应。本研究提供的 H. pusillum 叶绿体基因组可能对 Poaceae 物种的系统发育研究具有重要意义。

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