| 线粒体nad1基因内含子在稻族系统学研究中的价值——兼论Porteresia的系统位置 |
| |
| 引用本文： | 郭亚龙,葛颂.线粒体nad1基因内含子在稻族系统学研究中的价值——兼论Porteresia的系统位置[J].中国科学院研究生院学报,2004,42(4):333-344. |
| |
| 作者姓名： | 郭亚龙 葛颂 |
| |
| 作者单位： | 中国科学院植物研究所系统与进化植物学重点实验室 北京 100093 |
| |
| 摘 要： | 在植物的系统与进化研究中，相对于叶绿体和核基因片段来说，线粒体基因片段由于其分辨率较低、结构复杂而较少应用到系统学研究中。本研究选用nad1基因的第2内含子序列探讨了稻族Oryzeae的系统发育关系，并着重分析了单型属Porteresia的系统学位置，并在此基础上探讨了nad1基因内含子序列的系统学意义以及空位性状在系统发育重建中的价值。本研究结果支持将稻族分为两个亚族（Oryzinae和Zizaniinae）的处理，稻族中假稻属Leersia与稻属Oryza最近缘，Porteresia coarctata不应该单独成属而应处理为稻属的成员。本研究表明，nad1第2内含子具有一定的系统发育信息，尤其是在较高分类等级的系统发育重建中具有较大价值；同时表明空位的合理利用将在已有序列信息基础上提供更多的系统发育信息。
|
| 关 键 词： | nad1内含子 空位 线粒体DNA |
The utility of mitochondrial nad1 intron in phylogenetic study of Oryzeae with reference to the systematic position of Porteresia |
| |
| GUO Ya-Long,GE Song.The utility of mitochondrial nad1 intron in phylogenetic study of Oryzeae with reference to the systematic position of Porteresia[J].Journal of the Graduate School of the Chinese Academy of Sciences,2004,42(4):333-344. |
| |
| Authors: | GUO Ya-Long GE Song |
| |
| Abstract: | In the study of plant systematics and evolution, the gene sequences of mitochondrial genome are less used for their low informative sites and complex structure compared to those of the nuclear and chloroplast genomes. In this study, we sequenced the intron 2 of mitochondrial nad1 gene to study the phylogeny of Oryzeae, in particular emphasizing the systematic position of Porteresia, a monotypic genus of Oryzeae with the only species P. coarctata. The results indicate that the tribe Oryzeae should be divided into two subtribes (Oryzinae and Zizaniinae) and that Leersia is the most closely related genus to Oryza. The present data clearly demonstrate that Porteresia coarctata should be treated as a member in Oryza rather than as a separate genus. The sequences of nad1 intron 2 are informative enough in Oryzeae, and thus appear appropriate for the phylogenetic study at higher taxonomic levels. The gaps, when treated appropriately, can provide additional information in phylogenetic study. |
| |
| Keywords: | nad1 intron gap mitochondrial DNA Porteresia coarctata Oryzeae phylogeny |
|
| 点击此处可从《中国科学院研究生院学报》浏览原始摘要信息 |
| 点击此处可从《中国科学院研究生院学报》下载免费的PDF全文 |
