| Mitochondrial cytochrome b sequence variations and phylogeny of the East Asian bagrid catfishes |
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| 引用本文： | PENG Zuogang,HE Shunping,ZHANG Yaoguang. Mitochondrial cytochrome b sequence variations and phylogeny of the East Asian bagrid catfishes[J]. 自然科学进展(英文版), 2002, 12(6): 421-425 |
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| 作者姓名： | PENG Zuogang HE Shunping ZHANG Yaoguang |
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| 作者单位： | Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China；School of Life Science, Southwest China Normal University, Chongqing 400715, China,Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China,School of Life Science, Southwest China Normal University, Chongqing 400715, China |
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| 基金项目： | Supported by the Major State Basic Research Development Program of China (Grant No. G2000046804) and the Youth Scientists Group Program of Chinese Academy of Sciences. |
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| 摘 要： | The mitochondrial DNA cytochrome b gene was sequenced from 8 bagrid catfishes in China. Aligned with cytochrome b sequences from 9 bagrid catfishes in Japan, Korea and Russia retrieved from GenBank, and selected Silurus meridionalis, Liobagrus anguillicauda, Liobagrus reini and Phenacogrammus interruptus as outgroups, we constructed a matrix of 21 DNA sequences. The Kimura's two-parameter distances were calculated and molecular phylogenetic trees were constructed by using the maximum parsimony (MP) and neighbor-joining (NJ) methods. The results show that (i) there exist 3-bp deletions of mitochondrial cytochrome b gene compared with cypriniforms and characiforms; (ii) the molecular phylogenetic tree suggests that bagrid catfishes form a monophyletic group, and the genus Mystus is the earliest divergent in the East Asian bagrid catfishes, as well as the genus Pseudobagrus is a monophyletic group but the genus Pelteobagrus and Leiocassis are complicated; and (iii) the evolution rate of the East Asian bagrids mitochondrial cytochrome b gene is about 0.18%～0.30% sequence divergence per million years.
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| 关 键 词： | cytochrome b gene molecular phylogeny Bagridae Siluriformes |
Mitochondrial cytochrome b sequence variations and phylogeny of the East Asian bagrid catfishes |
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| PENG Zuogang,HE Shunping,ZHANG Yaoguang. Mitochondrial cytochrome b sequence variations and phylogeny of the East Asian bagrid catfishes[J]. Progress in Natural Science, 2002, 12(6): 421-425 |
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| Authors: | PENG Zuogang HE Shunping ZHANG Yaoguang |
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| Abstract: | The mitochondrial DNA cytochrome b gene was sequenced from 8 bagrid catfishes in China. Aligned with cytochrome b sequences from 9 bagrid catfishes in Japan, Korea and Russia retrieved from GenBank, and selected Silurus meridionalis, Liobagrus anguillicauda, Liobagrus reini and Phenacogrammus interruptus as outgroups, we constructed a matrix of 21 DNA sequences. The Kimura's two-parameter distances were calculated and molecular phylogenetic trees were constructed by using the maximum parsimony (MP) and neighbor-joining (NJ) methods. The results show that (i) there exist 3-bp deletions of mitochondrial cytochrome b gene compared with cypriniforms and characiforms; (ii) the molecular phylogenetic tree suggests that bagrid catfishes form a monophyletic group, and the genus Mystus is the earliest divergent in the East Asian bagrid catfishes, as well as the genus Pseudobagrus is a monophyletic group but the genus Pelteobagrus and Leiocassis are complicated; and (iii) the evolution rate of the East Asian bagrids mitochondrial cytochrome b gene is about 0.18%～0.30% sequence divergence per million years. |
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| Keywords: | cytochrome b gene molecular phylogeny Bagridae Siluriformes |
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