Genetic variation and phylogeography of Psammosilene tunicoides (Caryophyllaceae), a narrowly distributed and endemic species in south-western China

doi:10.1071/BT11024

	Genetic variation and phylogeography of Psammosilene tunicoides (Caryophyllaceae), a narrowly distributed and endemic species in south-western China
	Zhang, Qing-Ying 1,2; Zhao, Yu-Juan 1; Gong, Xun1
通讯作者	gongxun@mail.kib.ac.cn
	2011
发表期刊	AUSTRALIAN JOURNAL OF BOTANY
ISSN	0067-1924
卷号	59 期号:5 页码:450-459
摘要	Psammosilene tunicoides is a narrowly distributed and endemic species in south-western China. An investigation of sequence variation at two chloroplast DNA (cpDNA) regions (rpL16, trnQ-5'rps16) and one nuclear DNA (nDNA) locus (GPA1) were carried out to survey the population structure and population history of the species. Among the 22 populations across its geographical range, nine chloroplast haplotypes and 17 nuclear alleles were identified. Both cpDNA and nDNA consistently revealed high levels of population differentiation (G(ST) = 0.604 and 0.540, respectively), suggesting a distinct phylogeographic structure (N(ST) > G(ST), P < 0.01). This high genetic differentiation might be a combined effect of breeding system, limited pollen and seed dispersal and geographic isolation of populations. The level of haplotype diversities (cpDNA, h(T) = 0.575; nDNA, h(T) = 0.724) were high, but the nucleotide diversities (cpDNA, pi = 0.00099; nDNA, pi = 0.00105) were low. These results together with the star-like phylogenetic pattern and neutrality tests indicate that P. tunicoides has experienced a population expansion event in its evolution. Limited genetic exchange after population expansion was supported by the pronounced genetic differentiation among populations as well as evidence for 'isolation-by-distance' revealed by cpDNA. Due to high population subdivision and complex landscape, as many populations as possible should be considered for genetic conservation.
关键词	Qinghai-tibetan Plateau Population-structure Integrated Software Sequence Alignment Dna Polymorphism Range Expansion Alpine Plants Chloroplast Haplotypes History
学科领域	Plant Sciences
DOI	10.1071/BT11024
收录类别	SCI
语种	英语
WOS记录号	WOS:000294466200004
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/3824
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China 2.Yunnan Acad Agr Sci, Ind Crops Res Inst, Kunming 650205, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qing-Ying,Zhao, Yu-Juan,Gong, Xun. Genetic variation and phylogeography of Psammosilene tunicoides (Caryophyllaceae), a narrowly distributed and endemic species in south-western China[J]. AUSTRALIAN JOURNAL OF BOTANY,2011,59(5):450-459.
APA	Zhang, Qing-Ying,Zhao, Yu-Juan,&Gong, Xun.(2011).Genetic variation and phylogeography of Psammosilene tunicoides (Caryophyllaceae), a narrowly distributed and endemic species in south-western China.AUSTRALIAN JOURNAL OF BOTANY,59(5),450-459.
MLA	Zhang, Qing-Ying,et al."Genetic variation and phylogeography of Psammosilene tunicoides (Caryophyllaceae), a narrowly distributed and endemic species in south-western China".AUSTRALIAN JOURNAL OF BOTANY 59.5(2011):450-459.

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