Plastome-based phylogenomics resolves the placement of the sanguinolenta group in the spikemoss of lycophyte (Selaginellaceae)

doi:10.1016/j.ympev.2020.106788

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	Plastome-based phylogenomics resolves the placement of the sanguinolenta group in the spikemoss of lycophyte (Selaginellaceae)
	Zhang, Hong-Rui ; Wei, Ran ; Xiang, Qiao-Ping ; Zhang, Xian-Chun
刊名	MOLECULAR PHYLOGENETICS AND EVOLUTION
	2020
卷号	147
关键词	GC content Nucleotide substitution rate Phylogeny Plastome Sanguinolenta group
ISSN号	1055-7903
DOI	10.1016/j.ympev.2020.106788
文献子类	Article
英文摘要	Selaginellaceae have been shown to be monophyletic in previous studies, and include only the single genus Selaginella. However, the two most recent classifications of the genus disagree in terms of the number of subgenera recognized, and the position of problematic clades such as the sanguinolenta group, which has been resolved in quite different positions in different studies. Here, we performed a plastid-genome based phylogenomic analysis of Selaginellaceae to address this problem. The sanguinolenta group, represented here by three species, was resolved as sister to the remaining members of subg. Stachygynandrum. Additionally, subg. Exaltatae, subg. Ericetorum, and subg. Gymnogynum in Glade A clustered into a well supported monophyletic Glade but with conflicting topology between subgenera inside, which is possibly attributed to the early divergence among them. We uncovered substantial variation in both synonymous (dS) and nonsynonymous (dN) substitution rate, and GC content in plastomes of Selaginellaceae. The values of dS, dN, and GC content were significantly higher than those of other lycophytes (Isoetaceae and Lycopodiaceae). We observed a significant positive correlation between the high GC content, and the elevated dS and dN rates. In addition, the dS and dN values inferred among branches of Selaginellaceae were extremely variable. Our data indicate that this unevenly distributed substitution rate likely reflected relaxed or intensified selection among different lineages, which is possibly related to the inconsistency of the subgeneric phylogenetic topologies of Selaginellaceae.
学科主题	Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
电子版国际标准刊号	1095-9513
出版地	SAN DIEGO
WOS关键词	CHLOROPLAST GENOME SEQUENCE ; PHYLOGENETIC-RELATIONSHIPS ; EXTREME ; GENE ; CLASSIFICATION ; RECONSTRUCTION ; EVOLUTION ; SELECTION ; ORIGIN ; PLANTS
WOS研究方向	Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000527791400015
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670205, 31770237] ; International Postdoc Exchange Fellowship Program [Y911RE1001]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/21797]
专题	系统与进化植物学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 2.Xiang, Qiao-Ping 3.Wei, Ran 4.[Zhang, Hong-Rui
推荐引用方式 GB/T 7714	Zhang, Hong-Rui,Wei, Ran,Xiang, Qiao-Ping,et al. Plastome-based phylogenomics resolves the placement of the sanguinolenta group in the spikemoss of lycophyte (Selaginellaceae)[J]. MOLECULAR PHYLOGENETICS AND EVOLUTION,2020,147.
APA	Zhang, Hong-Rui,Wei, Ran,Xiang, Qiao-Ping,&Zhang, Xian-Chun.(2020).Plastome-based phylogenomics resolves the placement of the sanguinolenta group in the spikemoss of lycophyte (Selaginellaceae).MOLECULAR PHYLOGENETICS AND EVOLUTION,147.
MLA	Zhang, Hong-Rui,et al."Plastome-based phylogenomics resolves the placement of the sanguinolenta group in the spikemoss of lycophyte (Selaginellaceae)".MOLECULAR PHYLOGENETICS AND EVOLUTION 147(2020).