Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)
文献类型：期刊论文
| 作者 | Wu,Zhihua1; Liao,Rui1; Yang,Tiange1; Dong,Xiang2; Lan,Deqing1; Qin,Rui1; Liu,Hong1 |
| 刊名 | BMC Genomics
 |
| 出版日期 | 2020-09-10 |
| 卷号 | 21期号:1 |
| 关键词 | Saxifragaceae Chrysosplenium Chloroplast genome Opposite leaves Alternate leaves Phylogenomics |
| DOI | 10.1186/s12864-020-07045-4 |
| 英文摘要 | AbstractBackgroundChrysosplenium L. (Saxifragaceae) is a genus of plants widely distributed in Northern Hemisphere and usually found in moist, shaded valleys and mountain slopes. This genus is ideal for studying plant adaptation to low light conditions. Although some progress has been made in the systematics and biogeography of Chrysosplenium, its chloroplast genome evolution remains to be investigated.ResultsTo fill this gap, we sequenced the chloroplast genomes of six Chrysosplenium species and analyzed their genome structure, GC content, and nucleotide diversity. Moreover, we performed a phylogenetic analysis and calculated non-synonymous (Ka) /synonymous (Ks) substitution ratios using the combined protein-coding genes of 29 species within Saxifragales and two additional species as outgroups, as well as a pair-wise estimation for each gene within Chrysosplenium. Compared with the outgroups in Saxifragaceae, the six Chrysosplenium chloroplast genomes had lower GC contents; they also had conserved boundary regions and gene contents, as only the rpl32 gene was lost in four of the Chrysosplenium chloroplast genomes. Phylogenetic analyses suggested that the Chrysosplenium separated to two major clades (the opposite group and the alternate group). The selection pressure estimation (Ka/Ks ratios) of genes in the Chrysosplenium species showed that matK and ycf2 were subjected to positive selection.ConclusionThis study provides genetic resources for exploring the phylogeny of Chrysosplenium and sheds light on plant adaptation to low light conditions. The lower average GC content and the lacking gene of rpl32 indicated selective pressure in their unique habitats. Different from results previously reported, our selective pressure estimation suggested that the genes related to photosynthesis (such as ycf2) were under positive selection at sites in the coding region. |
| 语种 | 英语 |
| WOS记录号 | BMC:10.1186/S12864-020-07045-4 |
| 出版者 | BioMed Central |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/14402]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Liu,Hong |
| 作者单位 | 1.South-Central University for Nationalities; Hubei Provincial Key Laboratory for Protection and Application of Special Plant Germplasm in Wuling Area of China, Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Sciences 2.Wuhan Botanical Garden, Chinese Academy of Sciences; CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture |
| 推荐引用方式 GB/T 7714 | Wu,Zhihua,Liao,Rui,Yang,Tiange,et al. Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)[J]. BMC Genomics,2020,21(1). |
| APA | Wu,Zhihua.,Liao,Rui.,Yang,Tiange.,Dong,Xiang.,Lan,Deqing.,...&Liu,Hong.(2020).Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae).BMC Genomics,21(1). |
| MLA | Wu,Zhihua,et al."Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)".BMC Genomics 21.1(2020). |
入库方式： OAI收割
来源：武汉植物园
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