Phylogenetic position of Ephedra rhytidosperma, a species endemic to China:: Evidence from chloroplast and ribosomal DNA sequences

被引：11

作者：

Wang, QB

Wang, L

Zhou, RC

Zhao, XM

Shi, SH

Yang, Y ^{[1
]}

Zhong, Y

机构：

[1] Fudan Univ, Sch Life Sci, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Shanghai 200433, Peoples R China

[2] Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China

[3] Chinese Acad Sci, Inst Bot, Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China

[4] Shanghai Ctr Bioinformat Technol, Shanghai 201203, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2005年 / 50卷 / 24期

关键词：

Ephedra; Ephedra rhytidosperma; cpDNA matK gene; Chloroplast rbcL; nuclear ribosomal 18S; nrDNA ITS regions; phylogenetic analysis;

D O I：

10.1007/BF02899657

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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. equisetina. 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.

引用

页码：2901 / 2904

页数：4

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