吴茜, 姜梅, 陈海梅, 王立强, 黄林芳, 刘昶. 旋覆花、湖北旋覆花和线叶旋覆花的叶绿体基因组比较分析和系统发育研究J. 药学学报, 2020,55(5): 1042-1049. doi: 10.16438/j.0513-4870.2019-0774
引用本文: 吴茜, 姜梅, 陈海梅, 王立强, 黄林芳, 刘昶. 旋覆花、湖北旋覆花和线叶旋覆花的叶绿体基因组比较分析和系统发育研究J. 药学学报, 2020,55(5): 1042-1049. doi: 10.16438/j.0513-4870.2019-0774
WU Xi, JIANG Mei, CHEN Hai-mei, WANG Li-qiang, HUANG Lin-fang, LIU Chang. Comparative analysis of three complete chloroplast genomes of Inula genus with phylogenetic analysis of 49 plants from CarduoideaeJ. Acta Pharmaceutica Sinica, 2020,55(5): 1042-1049. doi: 10.16438/j.0513-4870.2019-0774
Citation: WU Xi, JIANG Mei, CHEN Hai-mei, WANG Li-qiang, HUANG Lin-fang, LIU Chang. Comparative analysis of three complete chloroplast genomes of Inula genus with phylogenetic analysis of 49 plants from CarduoideaeJ. Acta Pharmaceutica Sinica, 2020,55(5): 1042-1049. doi: 10.16438/j.0513-4870.2019-0774

旋覆花、湖北旋覆花和线叶旋覆花的叶绿体基因组比较分析和系统发育研究

Comparative analysis of three complete chloroplast genomes of Inula genus with phylogenetic analysis of 49 plants from Carduoideae

  • 摘要: 旋覆花、湖北旋覆花和线叶旋覆花均为菊科旋覆花属药用植物,其中湖北旋覆花为我国特有。为分析比较旋覆花属3个物种的基因组序列差异,进而为该属植物分子鉴别和种质资源开发提供科学依据,本文采用二代测序技术对旋覆花属3个物种的总DNA进行测序,使用NOVOPlasty成功组装了完整的叶绿体基因组,然后用CPGAVAS2对3个基因组的基因组成及重复序列进行了分析比较。最后用RAxML对旋覆花属3个物种及其近缘物种进行了系统发育分析。结果显示,旋覆花、湖北旋覆花和线叶旋覆花的叶绿体基因组全长分别为150 754、150 909、150 812 bp,均由一个大的单拷贝区(LSC)(82 427、82 552、82 474 bp),一个小的单拷贝区(SSC)(18 431、18 453、18 434 bp)和一对反向重复序列(IRs)(24 948、24 952、24 952 bp)组成。基因组注释结果显示,3个物种均共编码111个不同基因,包括79个蛋白编码基因、28个tRNA基因和4个rRNA基因。旋覆花、湖北旋覆花和线叶旋覆花叶绿体基因组G/C含量分别为37.72%、37.71%、37.71%;分别共检测到32、33、34个简单重复序列;18、22、18个串联重复序列和33、37、38个散在重复序列。系统发育分析结果表明,旋覆花属3个物种与阔苞菊聚在一起;表明旋覆花族与千里光族亲缘关系较近,可能起源于千里光族,而非菜蓟族。本研究为研究旋覆花属物种鉴定、亲缘关系、进化历史与遗传多样性研究奠定了坚实的基础。

     

    Abstract: Inula japonica, Inula hupehensis and Inula linaariifolia are all medicinal plants of Inula L. in the Compositae family, and Inula hupehensis is endemic to China. In order to compare their genomic sequence differences and provide scientific basis for their germplasm conservation and development, we obtained and analyzed the complete chloroplast genomes of these three species. Total DNAs were extracted from fresh leaves and subjected to next-generation DNA sequencing. NOVOPlasty was used to assemble the chloroplast genomes from the sequence reads. CPGAVAS2 was used to annotate the genes and repeats in each genome. Lastly, phylogenomics analysis was conducted using RAxML. The results showed that the total length of the chloroplast genome of Inula japonica, Inula hupehensis and Inula linaariifolia is 150 754, 150 909, and 150 812 bp respectively, each consisting of a large single copy region, a small single copy region and a pair of inverted repeat regions. In addition, the G/C content of all three chloroplast genomes was approximately 37.7% and each encoded 111 unique genes, including 79 protein-coding, 28 tRNA and 4 rRNA genes. Meanwhile, 32, 33, 34 simple repeat sequences, 18, 22, 18 tandem repeat sequences and 33, 37, 38 scattered repeat sequences were identified in three species. Phylogenomic analysis showed that all three species of Inula L. and Pluchea indica were clustered together, with the relationship between Inuleae and Senecioneae closer, suggesting that Inuleae may have originated from the Senecioneae, not the Cardueae. The data in this study not only enriches the chloroplast genome database of Inula L., but also lays the foundation for the future studies of species identification, phylogenetic relationships, evolution history and genetic diversity of Inula species.

     

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