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首页> 外文期刊>Chinese science bulletin >Phylogenetic position of Ephedra rhytidosperma, a species endemic to China: Evidence from chloroplast and ribosomal DNA sequences
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Phylogenetic position of Ephedra rhytidosperma, a species endemic to China: Evidence from chloroplast and ribosomal DNA sequences

机译：中国特有种麻黄（Ephedra rhydidosperma）的系统发生位置：叶绿体和核糖体DNA序列的证据

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摘要

The chloroplast genes matK and rbcL, ribosomal gene 18S and ITS regions of nuclear ribosomal DNA from Ephedra rhytidosperma, a species endemic to China, were sequenced and its phylogenetic position was investigated. Independent and combined phylogenetic analyses for the DNA sequences from 16 taxa representing 15 species of the genus Ephedra were performed using the maximum parsimony (MP), neighbor-joining (NJ), minimum evolution (ME) and maximum likelihood (ML) methods. The results indicate that E. rhytidosperma is closely related to E. equiset-ina. The divergence time between them is estimated to be 10.85 ± 2.44 Ma based on the results of the relative-rate tests and the evolutionary rate of rbcL gene.
机译：对中国特有种麻黄（Ephedra rhytidosperma）的叶绿体基因matK和rbcL，核糖体基因18S和核糖体DNA的ITS区域进行了测序，并研究了其系统发生位置。使用最大简约（MP），邻域结合（NJ），最小进化（ME）和最大似然（ML）方法，对代表15种麻黄属的16个分类群的DNA序列进行了独立和组合的系统发育分析。结果表明，假单胞菌与马术大肠杆菌密切相关。根据相对速率测试的结果和rbcL基因的进化速率，它们之间的发散时间估计为10.85±2.44 Ma。

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