二长棘犁齿鲷线粒体DNA控制区结构和进化

Structure and evolution of mitochondrial control regions in Evynnis cardinalis

  • 摘要: 测定了二长棘犁齿鲷(Evynnis cardinalis)线粒体控制区全序列,并结合从GenBank中下载的9种鲷科鱼类的相应序列,采用Clustal X对控制区结构进行了分析,识别了相应的保守序列,包括终止相关序列ETAS、中央保守区的CSB-F、CSB-E、CSB-E、CSB-C、CSB-B和CSB-A序列,以及保守序列区的CSB1、CSB2和CSB3序列。以副鲈(Paralabrax clathratus)和条斑星鲽(Verasper moseri)为外群,用最大简约法(MP)和邻接法(NJ)构建了系统发育树。结果显示鲷科鱼类构成一个单系类群,二长棘犁齿鲷应该归入赤鲷属,建议有必要对犁齿鲷属和赤鲷属的分类地位重新评估。

     

    Abstract: We determined the complete sequences of the mitochondrial DNA control regions in Evynnis cardinalis using long polymerase chain reaction (PCR), and aligned them by Clustal X with 9 related Sparidae sequences in GenBank. Several conserved sequence blocks were identified in the mitochondrial DNA control regions, including extended terminal associated sequences (ETAS), blocks of central domain (CSB-F, CSB-E, CSB-D, CSB-C, CSB-B, CSB-A) and conserved sequence blocks (CSB1, CSB2, CSB3). Taking Paralabrax clathratus and Verasper moseri as outgroups, the molecular phylogenetic trees of Sparidae were constructed based on neighbour-joining and maximum-parsimony methods, which reveal that Sparidae is a monophyletic group, and E.cardinalis should be grouped with Pagrus. Therefore, it is necessary to reevaluate the taxonomic status of Evynnis and Pagrus.

     

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