A high frequency of allopolyploid speciation in the gymnospermous genus Ephedra and its possible association with some biological and ecological features

doi:10.1111/mec.13538

	A high frequency of allopolyploid speciation in the gymnospermous genus Ephedra and its possible association with some biological and ecological features
	Wu, Hui 1; Ma, Zhen ; Wang, Ming-Ming ; Qin, Ai-Li ; Ran, Jin-Hua ; Wang, Xiao-Quan
	2016
发表期刊	MOLECULAR ECOLOGY
ISSN	0962-1083
卷号	25 期号:5 页码:1192-1210
摘要	The origin and evolution of polyploids have been studied extensively in angiosperms and ferns but very rarely in gymnosperms. With the exception of three species of conifers, all natural polyploid species of gymnosperms belong to Ephedra, in which more than half of the species show polyploid cytotypes. Here, we investigated the origin and evolution of polyploids of Ephedra distributed in the Qinghai-Tibetan Plateau (QTP) and neighbouring areas. Flow cytometry (FCM) was used to measure the ploidy levels of the sampled species that are represented by multiple individuals from different populations, and then, two single-copy nuclear genes (LFY and DDB2) and two chloroplast DNA fragments were used to unravel the possible origins and maternal donors of the polyploids. The results indicate that the studied polyploid species are allopolyploids, and suggest that allotetraploidy is a dominant mode of speciation in Ephedra. The high percentage of polyploids in the genus could be related to some of its biological attributes such as vegetative propagation, a relatively high rate of unreduced gamete formation, and a small genome size relative to most other gymnosperms. Significant ecological divergences between allotetraploids and their putative progenitors were detected by PCAs and anova and Tukey's tests, with the exception of E.saxatilis. The overlap of geographical distributions and ecological niches of some diploid species could have provided opportunities for interspecific hybridization and allopolyploid speciation.
关键词	ecological divergence Ephedra gymnosperm hybridization molecular phylogeny polyploid speciation
学科领域	Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
DOI	10.1111/mec.13538
收录类别	SCI
语种	英语
WOS关键词	QINGHAI-TIBET PLATEAU ; PHYLOGENETIC-RELATIONSHIPS ; EVOLUTIONARY CONSEQUENCES ; ASTERACEAE GNAPHALIEAE ; CLIMATIC NICHES ; FLOW-CYTOMETRY ; POLYPLOIDY ; GENOME ; PLANTS ; DNA
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000371433400012
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-294X
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31330008, 31170197, 30730010] ; Chinese Academy of SciencesChinese Academy of Sciences [KJZD-EW-L07] ; Chinese Academy of Sciences (CAS/SAFEA International Partnership Program for Creative Research Teams)
作者邮箱	xiaoq_wang@ibcas.ac.cn
作品OA属性	Green Published
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25014
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.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Wu, Hui,Ma, Zhen,Wang, Ming-Ming,et al. A high frequency of allopolyploid speciation in the gymnospermous genus Ephedra and its possible association with some biological and ecological features[J]. MOLECULAR ECOLOGY,2016,25(5):1192-1210.
APA	Wu, Hui,Ma, Zhen,Wang, Ming-Ming,Qin, Ai-Li,Ran, Jin-Hua,&Wang, Xiao-Quan.(2016).A high frequency of allopolyploid speciation in the gymnospermous genus Ephedra and its possible association with some biological and ecological features.MOLECULAR ECOLOGY,25(5),1192-1210.
MLA	Wu, Hui,et al."A high frequency of allopolyploid speciation in the gymnospermous genus Ephedra and its possible association with some biological and ecological features".MOLECULAR ECOLOGY 25.5(2016):1192-1210.

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