PDF(Pubmed)
Abstract：
The systematic revision of the family Peristediidae remains an unresolved issue due to their diverse and unique morphology. Despite the popularity of using mitochondrial genome research to comprehensively understand phylogenetic relationships in fish, genetic data for peristediid fish need to be included. Therefore, this study aims to investigate the mitochondrial genomic characteristics and intra-family phylogenetic relationships of Peristediidae by utilizing mitochondrial genome analysis. Therefore, this study aims to investigate the phylogenetic relationship of Peristediidae by utilizing mitochondrial genome analysis. The mitochondrial genome of four species of Peristediidae (Peristedion liorhynchus, Satyrichthys welchi, Satyrichthys rieffeli, and Scalicus amiscus) collected in the East China Sea was studied. The mitochondrial gene sequence lengths of four fish species were 16,533 bp, 16,526 bp, 16,527 bp, and 16,526 bp, respectively. They had the same mitochondrial structure and were all composed of 37 genes and one control region. Most PCGs used ATG as the start codon, and a few used GTG as the start codon. An incomplete stop codon (TA/T) occurred. The AT-skew and GC-skew values of 13 PCGs from four species were negative, and the GC-skew amplitude was greater than that of AT-skew. All cases of D-arm were found in tRNA-Ser (GCT). The Ka/Ks ratio analysis indicated that 13 PCGs were suffering purifying selection. Based on 12 PCGs (excluding ND6) sequences, a phylogenetic tree was constructed using Bayesian inference (BI) and maximum likelihood (ML) methods, providing a further supplement to the scientific classification of Peristediidae fish. According to the results of divergence time, the four species of fish had apparent divergence in the Early Cenozoic, which indicates that the geological events at that time caused the climax of species divergence and evolution.
摘要：
由于其多样化和独特的形态，对Peristediidae家族的系统修订仍然是一个悬而未决的问题。尽管使用线粒体基因组研究来全面了解鱼类的系统发育关系很受欢迎，需要包括周类鱼类的遗传数据。因此,本研究利用线粒体基因组分析的方法,探讨小附子科的线粒体基因组特征和家族内系统进化关系。因此,本研究旨在通过线粒体基因组分析来研究小附子科的系统发育关系。四逆境科（Peristedionliorhynchus，Satyrichthyswelchi,SatyrichthysRieffeli,研究了在东海收集的Scalicusamiscus）。4种鱼类的线粒体基因序列长度为16,533bp,16,526bp,16,527bp,和16,526个基点，分别。它们具有相同的线粒体结构，均由37个基因和一个控制区组成。大多数PCG使用ATG作为起始密码子，少数人使用GTG作为起始密码子。出现不完全终止密码子(TA/T)。来自四个物种的13个PCGs的AT-偏斜和GC-偏斜值均为负，GC-偏斜幅度大于AT-偏斜幅度。所有D臂病例均在tRNA-Ser（GCT）中发现。Ka/Ks比率分析表明13个PCG正在进行纯化选择。基于12个PCG(不包括ND6)序列，使用贝叶斯推理(BI)和最大似然(ML)方法构建系统发育树，进一步补充了对科鱼类的科学分类。根据分歧时间的结果，这四种鱼类在新生代早期有明显的差异，这表明当时的地质事件引起了物种分化和进化的高潮。
