Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau

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	Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau
	Duan, Yizhong 1,2; Gao, Qingbo 1; Zhang, Faqi 1,2; Li, Yinghu 1,2; Fu, Pengcheng 1,2; Chen, Shilong 1
	2011
发表期刊	NORDIC JOURNAL OF BOTANY
ISSN	0107-055X
卷号	29 期号:5 页码:615-624
文章类型	Article
摘要	The phylogeography of Sibiraea angustata, an endemic shrub species, was studied in the Qinghai-Tibet plateau (QTP). We investigated 466 individuals of S. angustata from 39 populations basically covering its total distribution area. Eight haplotypes (A-H) were detected by sequencing the intergenic chloroplast spacer trnS-trnG (600 bp), and one ancestral haplotype (A) was found to be widely distributed. The level of differentiation among populations was very high (G(ST) = 0.768; N(ST) = 0.850) and a significant phylogeographical structure was revealed (N(ST) > G(ST)). Analysis of molecular variance (AMOVA) similarily revealed a high level of differentiation among populations (84%, F(ST) = 0.842), indicating that little gene flow has occurred among populations mutually isolated by high mountains and rivers in the QTP. On the QTP platform there was only one widespread haplotype (A) in most populations, while populations along the eastern and southeastern edges had high diversity and unique haplotypes. Our results suggest that a glacial refugium may have been located on the eastern or southeastern edges of QTP during the last glaciation, and that interglacial and postglacial range expansion occurred from that refugium. Nested clade analysis (NCA) also suggests this scenario, which indicates that the current spatial distribution of cpDNA haplotypes and populations mainly resulted from long distance colonization, possibly coupled with subsequent or past fragmentation followed by range expansion and allopatric fragmentation.; The phylogeography of Sibiraea angustata, an endemic shrub species, was studied in the Qinghai-Tibet plateau (QTP). We investigated 466 individuals of S. angustata from 39 populations basically covering its total distribution area. Eight haplotypes (A-H) were detected by sequencing the intergenic chloroplast spacer trnS-trnG (600 bp), and one ancestral haplotype (A) was found to be widely distributed. The level of differentiation among populations was very high (G(ST) = 0.768; N(ST) = 0.850) and a significant phylogeographical structure was revealed (N(ST) > G(ST)). Analysis of molecular variance (AMOVA) similarily revealed a high level of differentiation among populations (84%, F(ST) = 0.842), indicating that little gene flow has occurred among populations mutually isolated by high mountains and rivers in the QTP. On the QTP platform there was only one widespread haplotype (A) in most populations, while populations along the eastern and southeastern edges had high diversity and unique haplotypes. Our results suggest that a glacial refugium may have been located on the eastern or southeastern edges of QTP during the last glaciation, and that interglacial and postglacial range expansion occurred from that refugium. Nested clade analysis (NCA) also suggests this scenario, which indicates that the current spatial distribution of cpDNA haplotypes and populations mainly resulted from long distance colonization, possibly coupled with subsequent or past fragmentation followed by range expansion and allopatric fragmentation.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	METAGENTIANA-STRIATA GENTIANACEAE ; CHLOROPLAST DNA ; INTRASPECIFIC PHYLOGEOGRAPHY ; MOLECULAR PHYLOGEOGRAPHY ; GENETIC DIFFERENTIATION ; POSTGLACIAL EXPANSION ; ICE AGES ; MITOCHONDRIAL ; POPULATIONS ; HISTORY
收录类别	SCI
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000296490300011
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1592
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Key Lab Adaptat & Evolut Plateau Biota, NW Inst Plateau Biol, Xining 810001, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Duan, Yizhong,Gao, Qingbo,Zhang, Faqi,et al. Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau[J]. NORDIC JOURNAL OF BOTANY,2011,29(5):615-624.
APA	Duan, Yizhong,Gao, Qingbo,Zhang, Faqi,Li, Yinghu,Fu, Pengcheng,&Chen, Shilong.(2011).Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau.NORDIC JOURNAL OF BOTANY,29(5),615-624.
MLA	Duan, Yizhong,et al."Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau".NORDIC JOURNAL OF BOTANY 29.5(2011):615-624.