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题名: Genetic diversity, demographical history and conservation aspects of the endangered yew tree Taxus contorta (syn. Taxus fuana) in Pakistan
作者: Poudel, Ram C.1, 2, 3; Moeller, Michael1, 3; null(李德铢)1, 2; Shah, Amin4; null(高连明)1
刊名: TREE GENETICS & GENOMES
关键词: Conservation ; Habitat fragmentation ; Inbreeding ; Chloroplast DNA ; Nuclear microsatellites ; Western Himalaya
英文摘要: The western Himalayan yew (Taxus contorta Griffith, synonym Taxus fuana Nan Li & R.R. Mill), one of the highly prized tree species for its anticancer properties, is experiencing severe reduction in populations across its range in Pakistan. We examined a chloroplast DNA region (trnL-F) and ten nuclear microsatellite loci variations among seven populations to investigate the levels of genetic diversity and reconstruct the demographic history of T. contorta in Pakistan. A low haplotype diversity (H (T) = 0.182), moderate level of microsatellite diversity (H (E) = 0.541 +/- 0.034), significant population differentiation (F (ST) = 0.107) and high level of inbreeding (F (IS) = 0.219-0.418) characterized this species. Results of an approximate Bayesian computation (ABC), mismatch distribution analysis, neutrality tests and data on glacial chronologies of the western Himalaya indicated a historic demographic expansion of T. contorta populations from small ancestral populations. This expansion is estimated to have occurred at least 37.5 thousand years ago (kya) during the late Pleistocene. An unprecedented level of habitat disturbance over the last few decades, coupled with the highly variable climate may have played an important role in shaping the genetic structure of the extant T. contorta populations. We have discussed a range of sustainable management measures for the ecological restoration of remnant populations as well as for a sustainable exploitation of this plant of high economic potential.
出版日期: 2014-06-01
卷号: 10, 期号:3, 页码:653-665
语种: 英语
收录类别: SCI
学科分类: Forestry ; Genetics & Heredity ; Agriculture
ISSN号: 1614-2942
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/18161
Appears in Collections:中国西南野生生物种质资源库_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Plant Divers & Biogeog East Asia, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Plant Germplasm & Genom Ctr, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China
3.Royal Bot Garden Edinburgh, Edinburgh EH3 5LR, Midlothian, Scotland
4.Univ Sargodha, Dept Biol Sci, Sargodha 40100, Punjab, Pakistan

Recommended Citation:
Poudel,RamC.;Moeller,Michael;Li,De-Zhu;Shah,Amin;Gao,Lian-Ming.Genetic diversity, demographical history and conservation aspects of the endangered yew tree Taxus contorta (syn. Taxus fuana) in Pakistan,TREE GENETICS & GENOMES,2014,10(3):653-665
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