Study of adaptive radiation and genetic structure in Bonin endemic plants.

小笠原特有植物适应性辐射和遗传结构的研究。

• 批准号: 11640691
• 负责人: ITO Motomi
• 金额: $ 2.3万
• 依托单位: THE UNIVERSITY OF TOKYO (2000)Chiba University (1999)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640691/
• 关键词: Bonin Islands; speciation; Crepidiastrum; C-ameristo phyllum; C-linguaefolium; C-grandicollum; マイクロサテライト; 遺伝的多様性

The Bonin (Ogasawara) Islands occur some 1000 km south of mainland Japan, at the western part of the North Pacific Ocean. These islands are Tertiary origin and have never been connected to any landmass. As reported from some ocean islands, the endemic rate in the vascular plants is rather high and is estimated as about 43%. The genus Crepidiastrum is distributed in East Asia and includes 7 species. They are rosette perennials or shrubs and all species have somatic chromosome number 2n=10. In Bonin Islands, three species of Crepidiastrum occur, and all of them are endemic to the Islands. Phylogenetic analyisi using DNA sequences of ITS region reveals that three endemic species of the Boinin Islands are monophyletic with high bootstrap value, and they had derived at the basal part of this genus.

小笠原群岛位于日本本土以南约1000公里处，位于北太平洋的西部。这些岛屿是第三纪起源，从未与任何大陆相连。据一些海洋岛屿的报道，维管植物的特有率相当高，估计约为43%。Crepidiastrum属分布于东亚，共有7种。它们是莲座多年生植物或灌木，所有物种的体细胞染色体数为2n=10。在博宁群岛，有三种Crepidiastrum，它们都是岛上特有的。利用ITS区DNA序列进行系统发育分析，发现博宁群岛特有的3个物种均为单系植物，具有较高的自举价值，来源于该属的基部。

项目成果

Ito. M., Watanabe, K., Kita, Y. et al.: "Phylogeny and Phytogeography of Euoatorium (Eupatorieae, Asteraceae): insights from sequence of the nrDNA ITS regions and cpDNA RFLP"Journal of Plant Research. 113・1(in press). (2000)

Ito. M.、Watanabe, K.、Kita, Y. 等：“Euoatorium（Eupatorieae、Asteraceae）的系统发育和植物地理学：nrDNA ITS 区域和 cpDNA RFLP 序列的见解”《植物研究杂志》113・1。 （正在出版）。

Ito,M.,Yahara,T.,King,M.R,Watanabe,K.,Oshita,S.,Yokoyama J,and Crawford,D.J.: "Molecular phylogeny of the Eupatorieae (Asteraceae) estimated from cpDNA RFLF and its implication for the polyploid origin hypothesis of the tribe."Journal of Plant Research. 1

Ito,M.、Yahara,T.、King,M.R、Watanabe,K.、Oshita,S.、Yokoyama J 和 Crawford,D.​​J.：“根据 cpDNA RFLF 估计的紫茎泽兰科（菊科）的分子系统发育及其对

Ito,M.,Yahara,T.,King,M.R.,Watanabe,K.,Oshita,S.,Yokoyama J.and Crawford,D.J.: "Molecular phylogeny of the Eupatorieae (Asteraceae) estimated from cpDNA RFLP and its implication for the polyploid origin hypothesis of the tribe."Journal of Plant Research.

Ito,M.、Yahara,T.、King,M.R.、Watanabe,K.、Oshita,S.、Yokoyama J. 和 Crawford,D.​​J.：“根据 cpDNA RFLP 估计的紫茎泽兰科（菊科）的分子系统发育及其对

Ito, M., Watanabe, K., Kita, Y, Kawahara, T., Crawford, D.J.and Yahara, T.: "Phylogeny and Phytogeography of Eupatorium (Eupatorieae, Asteraceae) : Insights from Sequence Data of the nrDNA ITS Regions and cpDNA RFLP."J.Plant Res.. 113. 79-89 (2000)

Ito, M.、Watanabe, K.、Kita, Y、Kawahara, T.、Crawford, D.J. 和 Yahara, T.：“紫茎泽兰 (Eupatorieae、Asteraceae) 的系统发育和植物地理学：来自 nrDNA ITS 区域和序列数据的见解

Ito,M.,Watanabe,K.,Kita,Y.,Kawahara,T.,Crawford,D.J.and Yahara,T.: "Phylogeny and Phytogeography of Eupatorium (Eupatorieae, Asteraceae): Insights from Sequence Data of the nrDNA ITS Regions and cpDNA RFLP."Journal of Plant Research. 113. 79-89 (2000)

Ito,M.、Watanabe,K.、Kita,Y.、Kawahara,T.、Crawford,D.​​J. 和 Yahara,T.：“紫茎泽兰（紫茎泽兰科、菊科）的系统发育和植物地理学：来自 nrDNA ITS 区域序列数据的见解