Molecular evidence for fragmentation among populations of Taxus wallichiana var. mairei, a highly endangered conifer in China

doi:10.1139/X09-003

	Molecular evidence for fragmentation among populations of Taxus wallichiana var. mairei, a highly endangered conifer in China
	Zhang, Xue-Mei1,2,3 ; Gao, Lian-Ming1,2 ; Moeller, Michael 4; Li, De-Zhu1,2
	2009-04-01
发表期刊	CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE
卷号	39 期号:4 页码:755-764
摘要	Taxus wallichiana var. mairei (Lemee & Leveille) L. K. Fu & Nan Li is a highly endangered conifer in China. It is dioecious and wind pollinated, with seed dispersal by animals. Extant natural populations on mainland China and Taiwan are highly scattered, largely as a result of habitat loss and overexploitation. Intersimple sequence repeat (ISSR) markers were employed to assess the genetic structure among 464 individuals from 17 populations across the variety's distribution range in the Sino-Japanese and Malesian floristic subkingdoms. ISSRs revealed a high genetic diversity (percentage of polymorphic loci = 98.4%, Nei's gene diversity = 0.3467, Shannon's information index = 0.5152) at the species level and high differentiation among populations (coefficient of gene differentiation = 0.4066; theta(B) = 0.4376). Gene flow among populations was found to be limited to the mainland populations. A UPGMA (unweighted pair group method with arithmetic mean) dendrogram suggests that the population in Taiwan is genetically the most isolated, while among the mainland populations a trend of an east-west split is suggested. This finding is supported by the analysis of molecular variance. The pattern of genetic variation suggests that the extant distribution of T. wallichiana var. mairei is the result of the fragmentation of a historically more continuous distribution. Conservation measures for this highly endangered plant are discussed, and an integrated approach to increase plant density and connectivity among the remaining populations is suggested.
学科领域	Forestry
DOI	10.1139/X09-003
收录类别	SCI
语种	英语
WOS记录号	WOS:000267810400006
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/11211
专题	中国西南野生生物种质资源库
作者单位	1.Chinese Acad Sci, Key Lab Biodivers & Biogeog, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China 2.Germplasm Bank Wild Species, Plant Germplasm & Genom Ctr, Kunming 650204, Yunnan, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 4.Royal Bot Garden Edinburgh, Edinburgh EH3 5LR, Midlothian, Scotland
推荐引用方式 GB/T 7714	Zhang, Xue-Mei,Gao, Lian-Ming,Moeller, Michael,et al. Molecular evidence for fragmentation among populations of Taxus wallichiana var. mairei, a highly endangered conifer in China[J]. CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE,2009,39(4):755-764.
APA	Zhang, Xue-Mei,Gao, Lian-Ming,Moeller, Michael,&Li, De-Zhu.(2009).Molecular evidence for fragmentation among populations of Taxus wallichiana var. mairei, a highly endangered conifer in China.CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE,39(4),755-764.
MLA	Zhang, Xue-Mei,et al."Molecular evidence for fragmentation among populations of Taxus wallichiana var. mairei, a highly endangered conifer in China".CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE 39.4(2009):755-764.

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