The complete chloroplast genome of <i>Keteleeria evelyniana</i> Mast var. <i>pendula</i> Hsüeh (Pinaceae), a species with extremely small populations in China

<i>Keteleeria evelyniana</i> Mast var. <i>pendula</i> Hsüeh, a typical plant species of extremely small population, is faced to be endangered. The complete chloroplast (cp) genome of <i>K. evelyniana</i> var. <i>pendula</i> has been assembled and annotated for the first time in this study. The complete genome in length was found to be 117,139 bp. The genome annotation revealed a total of 118 genes, including 34 transfer RNA (tRNA) genes, 4 ribosomal RNA (rRNA) genes, and 80 protein-coding genes. The maximum-likelihood phylogenetic tree supported that <i>K. evelyniana</i> var. <i>pendula</i>, <i>K. fortune</i>, <i>K. evelyniana</i>, and <i>K. davidiana</i> are clustered in one branch. This complete chloroplast genome helped us to understand the evolution of <i>K. evelyniana</i> var. <i>pendula</i>. These results laid the foundation for future studies on the conservation of this species.垂枝云南油杉（*Keteleeria evelyniana* Mast var. *pendula* Hsüeh）是一种种群规模极小的典型物种，目前正濒临灭绝。本研究首次完成了垂枝云南油杉的完整叶绿体（chloroplast, cp）基因组组装与注释。该完整基因组的长度为117,139 bp。基因组注释结果显示，该基因组共包含118个基因，其中包括34个转运RNA（transfer RNA, tRNA）基因、4个核糖体RNA（ribosomal RNA, rRNA）基因以及80个蛋白质编码基因。最大似然系统发育树结果表明，垂枝云南油杉、油杉（*K. fortune*）、云南油杉（*K. evelyniana*）以及铁坚油杉（*K. davidiana*）聚为同一分支。该完整叶绿体基因组有助于我们解析垂枝云南油杉的演化历程，本研究结果为该物种后续的保护研究奠定了基础。

搜集汇总

背景与挑战

背景概述

该数据集提供了中国极小种群濒危植物'Keteleeria evelyniana var. pendula'的完整叶绿体基因组信息，首次组装和注释了其117,139 bp的基因组，包含118个基因。研究通过系统发育分析揭示了该变种的进化关系，为物种保护提供了遗传学基础。