| 文昌鱼线粒体基因组特征分析及分子标记探讨 |
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| 引用本文： | 申 欣,田 美,孟学平,程汉良.文昌鱼线粒体基因组特征分析及分子标记探讨[J].海洋科学,2011,35(7):7-13. |
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| 作者姓名： | 申 欣 田 美 孟学平 程汉良 |
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| 作者单位： | 1. 淮海工学院海洋学院,江苏连云港222005／中国科学院海洋研究所,山东青岛266071
2. 淮海工学院海洋学院,江苏连云港,222005 |
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| 基金项目： | 国家自然科学基金资助项目(40906067); 江苏省青蓝工程人才基金资助项目(苏教师[2010]27 号); 江苏省海洋生物技术重点建设实验室研究基金资助项目(2009HS13); 淮海工学院自然科学基金资助项目(Z2009048) |
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| 摘 要： | 线粒体基因组已被广泛应用于后生动物分子系统发育和群体遗传的研究。文昌鱼（Amphioxus）作为研究脊椎动物起源和进化的模式动物，在脊椎动物起源和进化研究中占据极为重要的位置。作者综合分析文昌鱼2科7个种的51条线粒体基因组全序列，全面揭示了文昌鱼线粒体基因组的基本特征。文昌鱼线粒体基因组均编码后生动物标准的37个基因...
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| 关 键 词： | 文昌鱼(amphioxus) 线粒体基因组 差异位点 分子标记 |
| 收稿时间： | 2010/4/20 0:00:00 |
| 修稿时间： | 2010/11/18 0:00:00 |
Analysis of the characteristics of mitochondrial genomes and exploration of molecular markers in amphioxus |
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| SHEN Xin,TIAN Mei,MENG Xue-ping,CHENG Han-liang.Analysis of the characteristics of mitochondrial genomes and exploration of molecular markers in amphioxus[J].Marine Sciences,2011,35(7):7-13. |
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| Authors: | SHEN Xin TIAN Mei MENG Xue-ping CHENG Han-liang |
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| Institution: | SHEN Xin1,2,TIAN Mei1,MENG Xue-ping1,CHENG Han-liang1(1.College of Marine Science,Huaihai Institute of Technology,Lianyungang 222005,China,2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071 |
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| Abstract: | Mitochondrial genomes have been widely used in metazoan molecular phylogeny and genetic research. Amphioxus, as research model animals, occupies an important position in the origin and evolution of vertebrates. The basic characteristics of amphioxus mitochondrial genomes were fully revealed by our comprehensive analysis of 51 mitochondrial genome sequences from seven species. Amphioxus mitochondrial genomes contain 37 standard metazoan genes. Three types of gene arrangements were found in amphioxus mitochondrial genomes. Gene arrangements of Branchiostoma and Epigonichthys are most similar to those of typical vertebrate mitochondrial genomes. Therefore, gene arrangement shared by Branchiostoma and Epigonichthys represents the ancestral amphioxus gene order. In contrast, gene rearrangements were found in three species of the genus Asymmetron. The Ka/Ks ratios of the 13 amphioxus mitochondrial protein-coding genes were much lower than one (range between 0 and 0.3363), indicating a strong purifying selection (negative selection). The genetic variation analysis of main genes (13 protein coding genes and two ribosomal RNA genes) among and within amphioxus species shows that genes nad5, nad4 and nad2 are ideal molecular markers supplementary to the cox1 gene, and will provide useful information on conservation of amphioxus biological diversity and the utilization of biological resources. |
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| Keywords: | Amphioxus mitochondrial genome genetic different loci molecular marker |
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