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Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau
Duan, Yizhong ; Gao, Qingbo ; Zhang, Faqi ; Li, Yinghu ; Fu, Pengcheng ; Chen, Shilong
2011
发表期刊NORDIC JOURNAL OF BOTANY ; Duan, YZ; Gao, QB; Zhang, FQ; Li, YH; Fu, PC; Chen, SL.Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau,NORDIC JOURNAL OF BOTANY,2011,29(5):615-624
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.
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/45936
专题中国科学院西北高原生物研究所
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, Duan, YZ; Gao, QB; Zhang, FQ; Li, YH; Fu, PC; Chen, SL.Phylogeographic analysis of the endemic species Sibiraea angustata reveals a marginal refugium in the Qinghai-Tibet Plateau,NORDIC JOURNAL OF BOTANY,2011,29(5):615-624,2011.
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.
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 (2011).
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