Molecular phylogeny of Oryzeae (Poaceaf) based on DNA sequences from chloroplast, mitochondrial, and nuclear genomes
Molecular phylogeny of Oryzeae (Poaceaf) based on DNA sequences from chloroplast, mitochondrial, and nuclear genomes
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DOI：
10.3732/ajb.92.9.1548
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发表时间：
2005-09-01
影响因子：
3
通讯作者：
Ge, S
中科院分区：
文献类型：
--
作者：
Guo, YL;Ge, S
利用同源DNA片段（matK、trnL、nad 1、Adh 2）的序列分析，探讨了稻族（Oryzeae）的起源和进化历史。和GPA 1）。结果表明：（1）稻族是单脉的，福尔斯分为两个主要的分支，对应于传统上公认的亚族：（2）以前承认的三个单型属（Hydrogenata，Porteresia和Prosphytoorea）是不合理的;（3）雌雄同株属的密切亲缘关系不被支持，表明单性小花的多起源的可能性。根据matK和GPA 1序列的差异程度，我们认为稻属和李氏禾属在2000万年前（mya）从稻族的其余属中分支出来。彼此分离了大约1400万年一个分歧的时间类似于9百万年获得的最基本的分裂稻。这些估计表明，水稻分歧在中新世，从而意味着，长距离的传播似乎是一个重要的因素在部落的多样化。
The phylogeny and evolutionary history of the rice tribe (Oryzeae) were explored using sequences Of like DNA fragments (matK, trnL, nad1, Adh2. and GPA1) from chloroplast. mitochondrial, and nuclear genomes, Results indicate that (1) Oryzeae is monophletic and falls into two main clades corresponding to the traditionally recognized subtribes: (2) previous recognition of three monotypic genera (Hydrochloa, Porteresia, and Prosphytochloa) is not justified: and (3) close affinities of the monoecious genera are not supported, suggesting the possibility of multiple origins of unisexual florets. Based on the magnitude of matK and GPA1 sequence divergence, we suggest that Oryza and Leersia branched off from the remaining genera of Oryzeae 20 million years ago (mya). and separated from each other similar to 14 mya. A divergence time of similar to 9 mya is obtained for the most basal split within Oryza. These estimates suggest that Oryzeae diverged during the Miocene, and thus imply that long-distance dispersal appears to be one of the important factors in the diversification of the tribe.