NWIPB OpenIR
Plastome structure, phylogenomics and evolution of plastid genes in Swertia (Gentianaceae) in the Qing-Tibetan Plateau
Cao, Q; Gao, QB; Ma, XL; Zhang, FQ; Xing, R; Chi, XF; Chen, SL
2022
发表期刊BMC PLANT BIOLOGY
卷号22期号:1
摘要Background The genus Swertia is of great medicinal importance and one of the most taxonomically challenging taxa within Gentianaceae, largely due to the morphological similarities of species within this genus and with its closely related genera. Previous molecular studies confirmed its polyphyly but suffered from low phylogenetic resolutions because only limited sequence loci were used. Thus, we conducted the structural, gene evolutionary, and phylogenetic analyses of 11 newly obtained plastomes of Swertia. Our result greatly improved the phylogenetic resolutions in Swertia, shed new light on the plastome evolution and phylogenetic relationships of this genus. Results The 11 Swertia plastomes together with the published seven species proved highly similar in overall size, structure, gene order, and content, but revealed some structural variations caused by the expansion and contraction of the IRb region into the LSC region, due to the heterogeneous length of the psi ycf1. The gene rps16 was found to be in a state flux with pseudogenes or completely lost. Similar situation was also documented in other genera of Gentianaceae. This might imply loss of the gene in the common ancestor of Gentianaceae. The distribution plot of ENC vs. GC3 showed all these plastomes arranging very close in the Wright line with an expected ENC value (49-52%), suggesting the codon usage of Swertia was mainly constrained by a GC mutation bias. Most of the genes remained under the purifying selection, however, the cemA was identified under positive selection, possibly reflecting an adaptive response to low CO2 atmospheric conditions during the Late Miocene. Our phylogenomic analyses, based on 74 protein-coding genes (CDS), supported the polyphyly of Swertia with its close allies in the subtribe Swertiinae, presumably due to recent rapid radiation. The topology inferred from our phylogenetic analyses partly supported the current taxonomic treatment. Finally, several highly variable loci were identified, which can be used in future phylogenetic studies and accurate identification of medicinal genuineness of Swertia. Conclusions Our study confirmed the polyphyly of Swertia and demonstrated the power of plastome phylogenomics in improvement of phylogenetic resolution, thus contributing to a better understanding of the evolutionary history of Swertia.
收录类别SCIE
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/61239
专题中国科学院西北高原生物研究所
推荐引用方式
GB/T 7714
Cao, Q,Gao, QB,Ma, XL,et al. Plastome structure, phylogenomics and evolution of plastid genes in Swertia (Gentianaceae) in the Qing-Tibetan Plateau[J]. BMC PLANT BIOLOGY,2022,22(1).
APA Cao, Q.,Gao, QB.,Ma, XL.,Zhang, FQ.,Xing, R.,...&Chen, SL.(2022).Plastome structure, phylogenomics and evolution of plastid genes in Swertia (Gentianaceae) in the Qing-Tibetan Plateau.BMC PLANT BIOLOGY,22(1).
MLA Cao, Q,et al."Plastome structure, phylogenomics and evolution of plastid genes in Swertia (Gentianaceae) in the Qing-Tibetan Plateau".BMC PLANT BIOLOGY 22.1(2022).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Cao, Q]的文章
[Gao, QB]的文章
[Ma, XL]的文章
百度学术
百度学术中相似的文章
[Cao, Q]的文章
[Gao, QB]的文章
[Ma, XL]的文章
必应学术
必应学术中相似的文章
[Cao, Q]的文章
[Gao, QB]的文章
[Ma, XL]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。