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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, Michael4; 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.
资助信息National Basic Research Program of China [2007CB411600, 2008GA001]; Ministry of Science and Technology of China [2005DKA21006]; Natural Sciences Foundation of Yunnan NSFY [2005C0050M, 2007CO88M]; Keynote Project of the Knowledge Innovation Program ; CAS Kunming Institute of Botany ; project of Chinese Academy of Sciences ; Project of Yunnan Province [2008PY064]; Scottish Government Rural and Environment Research and Analysis Directorate
学科领域Forestry
DOI10.1139/X09-003
收录类别SCI
语种英语
WOS研究方向Forestry
WOS类目Forestry
WOS记录号WOS:000267810400006
引用统计
被引频次:6[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
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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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