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题名: Potential refugium on the Qinghai-Tibet Plateau revealed by the chloroplast DNA phylogeography of the alpine species Metagentiana striata (Gentianaceae)
作者: Chen, Shengyun1, 2; Wu, Guili3; Zhang, Dejun1, 2; Gao, Qingbo1, 2; Duan, Yizhong1, 2; Zhang, Faqi1, 2; Chen, Shilong1
刊名: BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
出版日期: 2008-05-01
卷号: 157, 期号:1, 页码:125-140
关键词: trnS-trnG ; Hengduan Mountain ; Qilianshan Mountains
学科分类: 生物科学::植物学
文章类型: Article
中文摘要: Metagentiana striata is an alpine annual herbaceous plant endemic to the east of the Qinghai-Tibet (Q-T) Plateau and adjacent areas. The phylogeography of M. striata was studied by sequencing the chloroplast DNA (cpDNA) trnS-trnG intergenic spacer. Ten haplotypes were identified from an investigation of 232 individuals of M. striata from 14 populations covering the entire geographical range of this species. The level of differentiation amongst populations was very high (G(ST) = 0.746; N-ST = 0.774) and a significant phylogeographical structure was observed (P < 0.05). An analysis of molecular variance found a high variation amongst populations (76%), with F-ST = 0.762 (highly significant, P < 0.001), indicating that little gene flow occurred amongst the different regions; this was explained by the isolation of populations by high mountains along the Q-T Plateau and adjacent areas (N-m = 0.156). Only one ancestral haplotype (A) was common and widespread throughout the distributional range of M. striata. The populations of the Hengduan Mountains region of the south-eastern Q-T Plateau showed high diversity and uniqueness of haplotypes. It is suggested that this region was the potential refugium of M. striata during the Quaternary glaciation, and that interglacial and postglacial range expansion occurred from this refugium. This scenario was in good agreement with the results of nested clade analysis, which inferred that the current spatial distribution of cpDNA haplotypes and populations resulted from range expansion, together with past allopatric fragmentation events. (c) 2008 The Linnean Society of London.
英文摘要: Metagentiana striata is an alpine annual herbaceous plant endemic to the east of the Qinghai-Tibet (Q-T) Plateau and adjacent areas. The phylogeography of M. striata was studied by sequencing the chloroplast DNA (cpDNA) trnS-trnG intergenic spacer. Ten haplotypes were identified from an investigation of 232 individuals of M. striata from 14 populations covering the entire geographical range of this species. The level of differentiation amongst populations was very high (G(ST) = 0.746; N-ST = 0.774) and a significant phylogeographical structure was observed (P < 0.05). An analysis of molecular variance found a high variation amongst populations (76%), with F-ST = 0.762 (highly significant, P < 0.001), indicating that little gene flow occurred amongst the different regions; this was explained by the isolation of populations by high mountains along the Q-T Plateau and adjacent areas (N-m = 0.156). Only one ancestral haplotype (A) was common and widespread throughout the distributional range of M. striata. The populations of the Hengduan Mountains region of the south-eastern Q-T Plateau showed high diversity and uniqueness of haplotypes. It is suggested that this region was the potential refugium of M. striata during the Quaternary glaciation, and that interglacial and postglacial range expansion occurred from this refugium. This scenario was in good agreement with the results of nested clade analysis, which inferred that the current spatial distribution of cpDNA haplotypes and populations resulted from range expansion, together with past allopatric fragmentation events. (c) 2008 The Linnean Society of London.
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Plant Sciences
研究领域[WOS]: Plant Sciences
关键词[WOS]: ICE AGES ; CLADISTIC-ANALYSIS ; POPULATION-GROWTH ; GLACIAL REFUGIA ; GEOGRAPHICAL-DISTRIBUTION ; RANGEWIDE PHYLOGEOGRAPHY ; PHENOTYPIC ASSOCIATIONS ; STATISTICAL TESTS ; CPDNA VARIATION ; PLASTID DNA
收录类别: SCI
语种: 英语
WOS记录号: WOS:000255455900012
Citation statistics:
内容类型: 期刊论文
URI标识: http://210.75.249.4/handle/363003/1220
Appears in Collections:中国科学院西北高原生物研究所_期刊论文

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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
3.Lanzhou Univ, Key Lab Arid & Grassland Ecol, Lanzhou 730000, Peoples R China

Recommended Citation:
Chen Shengyun,Wu Guili,Zhang Dejun, Gao Qingbo, Duan Yizhong, Zhang Faqi, Chen Shilong. Potential refugium on the Qinghai-Tibet Plateau revealed by the chloroplast DNA phylogeography of the alpine species Metagentiana striata (Gentianaceae).BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2008,157(1):125-140
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