Knowledge Management System of Northwest Institute of Plateau Biology, CAS
| Molecular systematics and biogeography of Crawfurdia, Metagentiana and Tripterospermum (Gentianaceae) based on nuclear ribosomal and plastid DNA sequences | |
| Chen, SY; Xia, T; Wang, YJ; Liu, JQ; Chen, SL | |
| 2005-09-01 | |
| 发表期刊 | ANNALS OF BOTANY
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| 卷号 | 96期号:3页码:413-424 |
| 文章类型 | Article |
| 摘要 | Background and Aims The systematic position of the genus Metagentiana and its phylogenetic relationships with Crawfurdia, Gentiana and Tripterospermum have not been explicitly addressed. These four genera belong to one of two subtribes (Gentianinae) of Gentianeae. The aim of this paper is to examine the systematic position of Crawfurdia, Metagentiana and Tripterospermum and to clarify their phylogenetic affinities more clearly using ITS and trnL intron sequences.Methods Nucleotide sequences from the internal transcribed spacers (ITS) of nuclear ribosomal DNA and the plastid DNA trnL (UAA) intron were analysed phylogenetically. Ten of fourteen Metagentiana species were sampled, together with 40 species of other genera in the subtribe Gentianinae.Key Results The data support several previously published conclusions relating to the separation of Metagentiana from Gentiana and its closer relationships to Crawfurdia and Tripterospermum based on studies of gross morphology, floral anatomy, chromosomes, palynology, embryology and previous molecular data. The molecular clock hypothesis for the tested sequences in subtribe Gentianinae was not supported by the data (P < 0.05), so the clock-independent non-parametric rate smoothing method was used to estimate divergence time. This indicates that the separation of Crawfurdia, Metagentiana and Tripterospermum from Gentiana occurred about 11.4-21.4 Mya (million years ago), and the current species of these three genera diverged at times ranging from 0.4 to 6.2 Mya.Conclusions The molecular analyses revealed that Crawfurdia, Metagentiana and Tripterospermum do not merit status as three separate genera, because sampled species of Crawfurdia and Tripterospermum are embedded within Metagentiana. The speciation and rapid radiation of these three genera is likely to have occurred in western China as a result of upthrust of the Himalayas during the late Miocene and the Pleistocene.; Background and Aims The systematic position of the genus Metagentiana and its phylogenetic relationships with Crawfurdia, Gentiana and Tripterospermum have not been explicitly addressed. These four genera belong to one of two subtribes (Gentianinae) of Gentianeae. The aim of this paper is to examine the systematic position of Crawfurdia, Metagentiana and Tripterospermum and to clarify their phylogenetic affinities more clearly using ITS and trnL intron sequences. |
| 关键词 | Asia Biogeography Crawfurdia Gentiana Gentianeae Gentianaceae Metagentiana Molecular Systematics Its Trnl (Uaa) Intron Tripterospermum |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科领域 | 植物学 |
| 关键词[WOS] | INTERNAL TRANSCRIBED SPACERS ; NUCLEOTIDE-SEQUENCES ; NORTHERN HEMISPHERE ; DIVERGENCE TIMES ; SPECIES RICHNESS ; CHLOROPLAST DNA ; PHYLOGENY ; SUBSTITUTION ; ASTERACEAE ; EVOLUTION |
| 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:000231363200008 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.75.249.4/handle/363003/1364 |
| 专题 | 中国科学院西北高原生物研究所 |
| 作者单位 | 1.Chinese Acad Sci, NW Plateau Inst Biol, Lab Qinghai Tibet Biol Evolut & Adaptat, 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 | Chen, SY,Xia, T,Wang, YJ,et al. Molecular systematics and biogeography of Crawfurdia, Metagentiana and Tripterospermum (Gentianaceae) based on nuclear ribosomal and plastid DNA sequences[J]. ANNALS OF BOTANY,2005,96(3):413-424. |
| APA | Chen, SY,Xia, T,Wang, YJ,Liu, JQ,&Chen, SL.(2005).Molecular systematics and biogeography of Crawfurdia, Metagentiana and Tripterospermum (Gentianaceae) based on nuclear ribosomal and plastid DNA sequences.ANNALS OF BOTANY,96(3),413-424. |
| MLA | Chen, SY,et al."Molecular systematics and biogeography of Crawfurdia, Metagentiana and Tripterospermum (Gentianaceae) based on nuclear ribosomal and plastid DNA sequences".ANNALS OF BOTANY 96.3(2005):413-424. |
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