Phylogenetic relationships of the Chinese sisorid catfishes: a nuclear intron versus mitochondrial gene approach

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	Phylogenetic relationships of the Chinese sisorid catfishes: a nuclear intron versus mitochondrial gene approach
	Guo, Xianguang ; He, Shunping ; Zhang, Yaoguang
刊名	HYDROBIOLOGIA
	2007-03-01
卷号	579 页码:55-68
关键词	phylogeny Sisoridae glyptosternoids intron S7 ribosomal protein gene 16S rRNA
ISSN号	0018-8158
通讯作者	He, SP, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
中文摘要	Several recent molecular phylogenetic studies of the sisorid catfishes (Sisoridae) have challenged some aspects of their traditional taxonomy and cladistic hypotheses of their phylogeny. However, disagreement with respect to relationships within this family in these studies highlights the need for additional data and analyses. Here we subjected 15 taxa representing 12 sisorids genera to comprehensive phylogenetic analyses using the second intron of low-copy nuclear S7 ribosomal protein (rpS7) gene and the mitochondrial 16S rRNA gene segments both individually and in combination. The competing sisorid topologies were then tested by using the approximately unbiased (AU) test and the Shimodaira-Hasegawa (SH) test. Our results support previously suggested polyphyly of Pareuchiloglanis. The genus Pseudecheneis is likely to be nested in the glyptosternoids and Glaridoglanis might be basal to the tribe Glyptosternini. However, justified by AU and SH test, the sister-group relationship between Pseudecheneis and the monophyletic glyptosternoids cannot be rejected based on the second intron of rpS7 gene and combined data analyses. It follows that both gene segments are not suitable for resolving the phylogenetic relationships within the sisorid catfishes. Overall, the second intron of rpS7 gene yielded poor phylogenetic performance when compared to 16S rRNA gene, the evolutionary hypothesis of which virtually agreed with the combined data analyses tree. This phenomenon can be explained by the insufficient length and fast saturation of substitutions in the second intron of rpS7 gene, due to substitution patterns such as frequent indels (insertion/deletion events) of bases in the sequences during the evolution.
英文摘要	Several recent molecular phylogenetic studies of the sisorid catfishes (Sisoridae) have challenged some aspects of their traditional taxonomy and cladistic hypotheses of their phylogeny. However, disagreement with respect to relationships within this family in these studies highlights the need for additional data and analyses. Here we subjected 15 taxa representing 12 sisorids genera to comprehensive phylogenetic analyses using the second intron of low-copy nuclear S7 ribosomal protein (rpS7) gene and the mitochondrial 16S rRNA gene segments both individually and in combination. The competing sisorid topologies were then tested by using the approximately unbiased (AU) test and the Shimodaira-Hasegawa (SH) test. Our results support previously suggested polyphyly of Pareuchiloglanis. The genus Pseudecheneis is likely to be nested in the glyptosternoids and Glaridoglanis might be basal to the tribe Glyptosternini. However, justified by AU and SH test, the sister-group relationship between Pseudecheneis and the monophyletic glyptosternoids cannot be rejected based on the second intron of rpS7 gene and combined data analyses. It follows that both gene segments are not suitable for resolving the phylogenetic relationships within the sisorid catfishes. Overall, the second intron of rpS7 gene yielded poor phylogenetic performance when compared to 16S rRNA gene, the evolutionary hypothesis of which virtually agreed with the combined data analyses tree. This phenomenon can be explained by the insufficient length and fast saturation of substitutions in the second intron of rpS7 gene, due to substitution patterns such as frequent indels (insertion/deletion events) of bases in the sequences during the evolution.
学科主题	Marine & Freshwater Biology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Marine & Freshwater Biology
研究领域[WOS]	Marine & Freshwater Biology
关键词[WOS]	RIBOSOMAL-PROTEIN GENE ; SEQUENCE VARIATIONS ; TREE SELECTION ; CYTOCHROME-B ; SUBSTITUTION ; CONFIDENCE ; INFERENCE ; FISHES ; MODEL ; S7
收录类别	SCI
语种	英语
WOS记录号	WOS:000244187200005
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/8696]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.SW Univ, Sch Life Sci, Chongqing 400715, Peoples R China
推荐引用方式 GB/T 7714	Guo, Xianguang,He, Shunping,Zhang, Yaoguang. Phylogenetic relationships of the Chinese sisorid catfishes: a nuclear intron versus mitochondrial gene approach[J]. HYDROBIOLOGIA,2007,579:55-68.
APA	Guo, Xianguang,He, Shunping,&Zhang, Yaoguang.(2007).Phylogenetic relationships of the Chinese sisorid catfishes: a nuclear intron versus mitochondrial gene approach.HYDROBIOLOGIA,579,55-68.
MLA	Guo, Xianguang,et al."Phylogenetic relationships of the Chinese sisorid catfishes: a nuclear intron versus mitochondrial gene approach".HYDROBIOLOGIA 579(2007):55-68.