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Molecular phylogeography of alpine plant Metagentiana striata (Gentianaceae)
Chen, Sheng-Yun ; Wu, Gui-Li ; Zhang, De-Jun ; Gao, Qing-Bo ; Duan, Yi-Zhong ; Zhang, Fa-Qi ; Chen, Shi-Long
2008-07-01
发表期刊JOURNAL OF SYSTEMATICS AND EVOLUTION
摘要Herbaceous plants have a short life cycle and are sensitive to environmental changes. Thus, they may serve as good models to elucidate historical processes of plant populations since Quaternary glaciations. Molecular phylogeographic analysis is a powerful tool to reveal the population history of plants and animals. To understand the geographic history of alpine plants in the Qinghai-Tibet Plateau, which is still poorly known, we surveyed sequence variation of the chloroplast DNA (cpDNA) noncoding fragment trnH (GUG)-psbA intergenic spacer throughout the range of Metagentiana striata (Maxim.) T. N. Ho, S. W. Liu & S. L. Chen, an annual and herbaceous alpine plant in the Qinghai-Tibet Plateau and adjacent areas. Seven haplotypes were detected by analyzing 155 individuals from 13 populations of this species. One haplotype (A) was common and widespread, and three haplotypes (E, F and G) were unique in their populations. The center of haplotype diversity is located in the Hengduan Mountains of southeastern Qinghai-Tibet Plateau, with 2-3 haplotypes present in each of four populations. In populations from the northeastern and eastern Qinghai-Tibet Plateau as well as from adjacent regions, however, only a single haplotype was found in each population, with different populations having different haplotypes. An analysis of molecular variance (AMOVA) for populations of M striata showed that the genetic variation mainly resided among populations (73.05%), and the estimates of interpopulation differentiation were very high (G(ST)=0.805, F(ST)=0.731, N(ST)=0.859). Further, a significant phylogeographic structure was present (N(ST) > G(ST), P<0.05) whereas the value of average gene flow was low (N(m)=0.184) in the entire geographical range. Along with the nested clade analysis (NCA), our results suggested that the Hengduan Mountains of southeastern Qinghai-Tibet Plateau served as a possible refugium during the Quaternary glaciations, and the interglacial or post-glacial range expansion by plants from the refugium followed by allopatric and past fragmentation shaped the present distribution patterns of haplotypes and populations.
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/43414
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
Chen, Sheng-Yun,Wu, Gui-Li,Zhang, De-Jun,et al. Molecular phylogeography of alpine plant Metagentiana striata (Gentianaceae)[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2008.
APA Chen, Sheng-Yun.,Wu, Gui-Li.,Zhang, De-Jun.,Gao, Qing-Bo.,Duan, Yi-Zhong.,...&Chen, Shi-Long.(2008).Molecular phylogeography of alpine plant Metagentiana striata (Gentianaceae).JOURNAL OF SYSTEMATICS AND EVOLUTION.
MLA Chen, Sheng-Yun,et al."Molecular phylogeography of alpine plant Metagentiana striata (Gentianaceae)".JOURNAL OF SYSTEMATICS AND EVOLUTION (2008).
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