The complete plastome and phylogenetic analysis of <i>Zingiber ottensii</i> Valeton

Zingiber ottensii Valeton (1918) is a perennial herb in Zingiberaceae, which has important medicinal and edible values. Here, we first reported and characterized the complete chloroplast genome (plastome) of Z. ottensii using the whole-genome resequencing technology. The plastome was 169,569 bp in size and contained 138 genes, including 92 protein-coding genes, 38 tRNA genes, and 8 rRNA genes. It exhibits a typical quadripartite structure with a large single-copy region (LSC, 86,760 bp), a small single-copy region (SSC, 7,615 bp), and a pair of inverted repeats (IRs, 37,597 bp). Phylogenetic analysis confirmed that Z. ottensii belonged to Zingiber sect. Zingiber and revealed its close relationship to Zingiber zerumbet (L.) Roscoe ex Sm. These results provided essential genomic resources for future phylogenetic and evolutionary studies of Zingiber Mill.奥滕姜（Zingiber ottensii Valeton，1918）为姜科（Zingiberaceae）多年生草本植物，兼具重要的药用与食用价值。本研究首次采用全基因组重测序技术，完成了奥滕姜完整叶绿体基因组（质体基因组，plastome）的报道与解析。该质体基因组全长169569 bp，共包含138个基因，其中92个为蛋白质编码基因、38个转运RNA（tRNA，transfer RNA）基因以及8个核糖体RNA（rRNA，ribosomal RNA）基因。其结构为典型的四分体结构，包含一个大单拷贝区（LSC，large single-copy，86760 bp）、一个小单拷贝区（SSC，small single-copy，7615 bp）以及一对反向重复区（IRs，inverted repeats，37597 bp）。系统发育分析证实，奥滕姜隶属于姜属姜组（Zingiber sect. Zingiber），且与球穗姜（Zingiber zerumbet (L.) Roscoe ex Sm.）亲缘关系紧密。本研究结果为未来姜属（Zingiber Mill.）的系统发育与进化研究提供了关键的基因组资源。