Plastome phylogenomics of Cephalotaxus (Cephalotaxaceae) and allied genera

doi:10.1093/aob/mcaa201

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	Plastome phylogenomics of Cephalotaxus (Cephalotaxaceae) and allied genera
	Ji,Yunheng; Liu,Changkun ; Landis,Jacob B.; Deng,Min ; Chen,Jiahui
	2021
发表期刊	ANNALS OF BOTANY
ISSN	0305-7364
卷号	127 期号:5 页码:697-708
摘要	Background and Aims Cephalotaxus is a paleo-endemic genus in East Asia that consists of about 7-9 conifer species. Despite its great economic and ecological importance, the relationships between Cephalotaxus and related genera, as well as the interspecific relationships within Cephalotaxus, have long been controversial, resulting in contrasting taxonomic proposals in delimitation of Cephalotaxaceae and Taxaceae. Based on plastome data, this study aims to reconstruct a robust phylogeny to infer the systematic placement and the evolutionary history of Cephalotaxus.Methods A total of 11 plastomes, representing all species currently recognized in Cephalotaxus and two Torreya species, were sequenced and assembled. Combining these with previously published plastomes, we reconstructed a phylogeny of Cephalotaxaceae and Taxaceae with nearly full taxonomic sampling. Under a phylogenetic framework and molecular dating, the diversification history of Cephalotaxus and allied genera was explored.Key Results Phylogenetic analyses of 81 plastid protein-coding genes recovered robust relationships between Cephalotaxus and related genera, as well as providing a well-supported resolution of interspecific relationships within Cephalotaxus, Taxus, Torreya and Amentotaxus. Divergence time estimation indicated that most extant species of these genera are relatively young, although fossil and other molecular evidence consistently show that these genera are ancient plant lineages.Conclusions Our results justify the taxonomic proposal that recognizes Cephalotaxaceae as a monotypic family, and contribute to a clear-cut delineation between Cephalotaxaceae and Taxaceae. Given that extant species of Cephalotaxus are derived from recent divergence events associated with the establishment of monsoonal climates in East Asia and Pleistocene climatic fluctuations, they are not evolutionary relics.
关键词	Gymnosperm Cephalotaxaceae Taxaceae phylogeny molecular dating taxonomic delineation recent speciation QUANTITATIVE RECONSTRUCTION PHYLOGENETIC-RELATIONSHIPS EVOLUTIONARY HISTORY MOLECULAR PHYLOGENY SOUTHWEST CHINA TAXACEAE FLORA CHLOROPLAST SEQUENCE CLIMATE
DOI	10.1093/aob/mcaa201
WOS记录号	WOS:000646249100011
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73584
专题	中国科学院昆明植物研究所
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Integrat Conservat Plant Species E, Kunming 650201, Yunnan, Peoples R China 3.Landis, Jacob B.] Cornell Univ, Sch Integrat Plant Sci, Sect Plant Biol, Ithaca, NY 14850 USA 4.Landis, Jacob B.] Cornell Univ, LH Bailey Hortorium, Ithaca, NY 14850 USA 5.Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Ji,Yunheng,Liu,Changkun,Landis,Jacob B.,et al. Plastome phylogenomics of Cephalotaxus (Cephalotaxaceae) and allied genera[J]. ANNALS OF BOTANY,2021,127(5):697-708.
APA	Ji,Yunheng,Liu,Changkun,Landis,Jacob B.,Deng,Min,&Chen,Jiahui.(2021).Plastome phylogenomics of Cephalotaxus (Cephalotaxaceae) and allied genera.ANNALS OF BOTANY,127(5),697-708.
MLA	Ji,Yunheng,et al."Plastome phylogenomics of Cephalotaxus (Cephalotaxaceae) and allied genera".ANNALS OF BOTANY 127.5(2021):697-708.

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