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学科主题: Genetics & Heredity
题名: Comparative studies of the complete mitochondrial genomes of four Paphia clams and reconsideration of subgenus Neotapes (Bivalvia: Veneridae)
作者: Xu, XD ; Wu, XY ; Yu, ZN
通讯作者: carlzyu@scsio.ac.cn
关键词: Paphia ; Mitochondrial genome ; Clam ; Neotapes
刊名: GENE
发表日期: 2012
卷: 494, 期:1, 页:17-23
部门归属: [Xu, Xiaodong; Wu, Xiangyun; Yu, Ziniu] Chinese Acad Sci, Key Lab Marine Bioresource Sustainable Utilizat, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
项目归属: LMB
摘要: The extreme variability of the mitochondrial (mito) genomes of bivalves makes it difficult to understand their evolutionary dynamics, given that species from different families do not share comparable features. We compared the mitogenomes from four Paphia clams (three of them were firstly sequenced) and found that mitogenome reorganization among the four congeneric species is not random but follows phylogenetic trends. Start/stop codon variations are species-correlated rather than gene-correlated, and bear useful phylogenetic information. Unique start/stop codon usage in P. euglypta and A+T content in P. amabilis indicates that these mitogenome-level characters, usually considered to be conservative features in other lineages, may not be phylogenetically evolved, but may have evolved via species-specific mitogenomic maintenance mechanisms. Variable divergence of two trnM genes in different lineages may demonstrate differences in mechanisms by which paralogous trnM genes are maintained. Sequence alignment analysis indicates that the VNTRs in the four mitogenomes have a common origin. The rationale of the subgenus Neotapes Kuroda and Habe, 1971 was supported by evidence from morphological characters, mitogenomic features, as well as phylogenetic analyses using cox1 and rrnS genes. The data suggest that the taxonomic basis of the subgenus should be "smooth surface" but not "undulated lines," and P. textile should be classified to the Neotapes subgenus. (C) 2011 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000300542800003
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/9976
Appears in Collections:中科院海洋生物资源可持续利用重点实验室_期刊论文

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Xu, XD; Wu, XY; Yu, ZN.Comparative studies of the complete mitochondrial genomes of four Paphia clams and reconsideration of subgenus Neotapes (Bivalvia: Veneridae),GENE,2012,494(1):17-23
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文件名: Comparative studies of the complete mitochondrial genomes of four Paphia clams and reconsideration of subgenus Neotapes.pdf
格式: Adobe PDF
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