The chloroplast genome sequence of Nitraria tangutorum, a desert shrub, was sequenced using high-throughput sequencing technology and analysed phylogenetically in the present study. The chloroplast genome is 159,414 bp in length, including a large single copy region of 87,924 bp and small single copy region of 18,318 bp, and a pair of inverted repeat regions of 26,586 bp. The chloroplast genome contains 110 unique genes, including 77 protein-coding genes, four ribosomal RNA genes, and 29 tRNA genes. Most of these genes are present as a single copy and in two or more copies 19 genes occurred. Seventeen genes have one intron, and clpP and ycf3 genes contain two introns. A total of 81 simple sequence repeats (SSRs) were identified, most of them were found to be mononucleotide repeats composed of A/T. In addition to SSRs, 66 repeats were identified, including 41 tandem repeats, 10 palindromic repeats, and 15 forward repeats. The phylogenetic analysis based on 54 protein-coding genes demonstrated a close relationship between N. tangutorum and other plant species in Sapindales. The complete chloroplast genome sequence of N. tangutorum will provide important data for further study of taxonomy and systematics of the genus Nitraria.

中文翻译：

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沙漠灌木Nitraria tangutorum的完整叶绿体基因组的表征。

使用高通量测序技术对唐古特白刺（Nitraria tangutorum）的叶绿体基因组序列进行测序，并在本系统中进行系统发育分析。叶绿体基因组的长度为159,414 bp，包括一个大的单拷贝区域87,924 bp和一个小的单拷贝区域18,318 bp，以及一对反向重复序列区域26,586 bp。叶绿体基因组包含110个独特基因，包括77个蛋白质编码基因，4个核糖体RNA基因和29个tRNA基因。这些基因大多数以单拷贝形式存在，并且在两个或多个拷贝中出现了19个基因。17个基因有1个内含子，而clpP和ycf3基因有2个内含子。总共鉴定出81个简单序列重复序列（SSR），其中大多数是由A / T组成的单核苷酸重复序列。除了SSR，还发现了66个重复序列，包括41个串联重复序列，10个回文重复序列和15个正向重复序列。基于54个蛋白质编码基因的系统发育分析表明，唐pin猪笼草与Sapindales的其他植物物种之间有着密切的关系。唐古特猪笼草的完整叶绿体基因组序列将为进一步研究白屈菌属的分类学和系统学提供重要数据。