Phylogeography and evolution of three closely related species of Tsuga (hemlock) from subtropical eastern Asia: further insights into speciation of conifers

doi:10.1111/jbi.12421

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	Phylogeography and evolution of three closely related species of Tsuga (hemlock) from subtropical eastern Asia: further insights into speciation of conifers
	Cun, Yu-Zhi ; Wang, Xiao-Quan
刊名	JOURNAL OF BIOGEOGRAPHY
	2015
卷号	42 期号:2 页码:315-327
关键词	Eastern Asia gene flow glacial refugia incomplete lineage sorting peripatric speciation phylogeography population differentiation southern China species delimitation Tsuga
ISSN号	0305-0270
DOI	10.1111/jbi.12421
文献子类	Article
英文摘要	Aim The biogeography and speciation of conifers are of special interest because of the ecological importance of these trees, but the boundaries and evolutionary relationships of closely related species of conifers are difficult to disentangle. To investigate how lineage sorting and gene flow affect species boundaries in conifers, we studied the population genetic structure and phylogeo-graphical history of the Tsuga chinensis-T. forrestii complex and compared the results with those for a closely related species, T. dumosa. Location Subtropical eastern Asia. Methods Phylogeographical analyses, in combination with coalescent simulations, were performed based on sequence variation of paternal chloroplast and maternal mitochondrial DNA in 1368 individuals from 52 populations of the three Tsuga (hemlock) species. Results Mitotypes were shared extensively among the three species while the chlorotypes were relatively more species-specific. Two genetic breaks and thus three distinct geographical groups were identified in the T. chinensis-T. forrestii species pair. Unidirectional pollen flow from T. forrestii to T. chinensis was detected. Main conclusions Tsuga forrestii originated from a pre-existing isolate of T. chinensis, and a cryptic genetic break formed between eastern and western populations of the latter. Incomplete lineage sorting was responsible for the extensive sharing of mitotypes among the three hemlock species, and our results seem to support the idea that paternally inherited markers are more effective in delimiting species than maternally inherited markers. We also found that hemlock populations in the Himalayas were very likely to have experienced extinction, but that most populations in other areas of subtropical mainland China survived the late Quaternary glacial cycles by elevational shifts.
学科主题	Ecology ; Geography, Physical
电子版国际标准刊号	1365-2699
出版地	HOBOKEN
WOS关键词	ABIES-ALBA MILL. ; MITOCHONDRIAL-DNA ; GENETIC IMPRINTS ; POPULATION ; CHLOROPLAST ; CHINA ; DIVERGENCE ; PHYLOGENY ; PINACEAE ; INTROGRESSION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	WILEY
WOS记录号	WOS:000350558900011
资助机构	National Natural Science Foundation of China [30730010, 31160047] ; Chinese Academy of Sciences [KJZD-EW-L07] ; Dali University [KY1019208208410]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25759]
专题	系统与进化植物学国家重点实验室
作者单位	1.[Cun, Yu-Zhi 2.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 3.Dali Univ, Dali 671003, Peoples R China
推荐引用方式 GB/T 7714	Cun, Yu-Zhi,Wang, Xiao-Quan. Phylogeography and evolution of three closely related species of Tsuga (hemlock) from subtropical eastern Asia: further insights into speciation of conifers[J]. JOURNAL OF BIOGEOGRAPHY,2015,42(2):315-327.
APA	Cun, Yu-Zhi,&Wang, Xiao-Quan.(2015).Phylogeography and evolution of three closely related species of Tsuga (hemlock) from subtropical eastern Asia: further insights into speciation of conifers.JOURNAL OF BIOGEOGRAPHY,42(2),315-327.
MLA	Cun, Yu-Zhi,et al."Phylogeography and evolution of three closely related species of Tsuga (hemlock) from subtropical eastern Asia: further insights into speciation of conifers".JOURNAL OF BIOGEOGRAPHY 42.2(2015):315-327.