Major Patterns of higher teleostean phylogenies based on complete mitochondrial DNA sequences

基于完整线粒体 DNA 序列的高等硬骨动物系统发育的主要模式

基本信息

批准号：
13640711
负责人：
MIYA Masaki
金额：
$ 2.24万
依托单位：
Natural History Museum and Institute, Chiba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

A recent preliminary study using complete mitochondrial DNA sequences from 48 species of teleosts has suggested that higher teleostean phylogenies should be reinvestigated on the basis of more intensive taxonomic sampling. As a second step towards the resolution of higher teleostean phylogenies, which have been described as the "(unresolved) bush at the top of the tree," we reanalyzed their relationships using mitogenomic data from 100 purposefully-chosen species that fully represented all of the higher teleostean orders, except for the Batrachoidiformes. Unweighted and weighted maximum parsimony analyses were conducted with the data set that comprised concatenated nucleotide sequences from 12 protein-coding genes(excluding 3rd codon positions) and 21 transfer RNA (tRNA) genes (stem regions only) from each species. The resultant trees were well resolved and largely congruent, with most internal branches being supported by high statistical values. All major, comprehensive groups above ordinal level as currently defined in higher teleosts (with the exception of the Neoteleostei and several monotypic groups) , such as the Eurypterygii, Ctenosquamata, Acanthomorpha, Paracanthopterygii , Acanthopterygii , and Percomorpha, appeared to be nonmonophyletic in the present tree. Such incongruities largely resulted from differences in the placement and/or limits of the orders Ateleopodiformes, Lampridiformes, Polymixiiformes, Ophidiiformes, Lophiiformes, Beryciformes, Stephanoberyciformes , and Zeiformes , long-standing problematic taxa in systematic ichthyology. Of these, the resulting phylogenetic positions of the Ophidiiformes and Lophiiformes were totally unexpected, because, although they have consistently been considered relatively primitive groups within higher teleosts (Paracanthopterygii), they were confidently placed within a crown group of teleosts, herein called the Percomorpha.

最近一项使用来自 48 个硬骨鱼物种的完整线粒体 DNA 序列的初步研究表明，应该在更密集的分类学采样的基础上重新研究高等硬骨鱼的系统发育。作为解决高等硬骨动物系统发育的第二步，这些系统发育被描述为“树顶的（未解决的）灌木丛”，我们使用来自 100 个特意选择的物种的线粒体基因组数据重新分析了它们的关系，这些数据完全代表了所有高等硬骨目，除了蝠形目之外。对数据集进行了未加权和加权最大简约分析，该数据集包含来自每个物种的 12 个蛋白质编码基因（不包括第 3 个密码子位置）和 21 个转移 RNA (tRNA) 基因（仅茎区）的串联核苷酸序列。由此产生的树得到了很好的解析并且基本一致，大多数内部分支都得到了高统计值的支持。目前在高等硬骨鱼中定义的所有高于有序水平的主要综合类群（新硬骨鱼类和几个单型类群除外），例如广翅类、栉鳞类、棘形类、副棘鳍类、棘鳍类和穿形类，目前似乎都是非单系的树。这种不一致主要是由于Ateleopodiformes、Lampridiformes、Polymixiiformes、Ophiiiformes、Lophiiformes、Beryciformes、Stephanoberyciformes和Zeiformes等目的位置和/或限制的差异造成的，这些目是系统鱼类学中长期存在的问题类群。其中，蛇形目和 Lophiiformes 的系统发育位置是完全出乎意料的，因为尽管它们一直被认为是高等硬骨鱼（Paracanthopterygii）中相对原始的类群，但它们被自信地置于硬骨鱼的皇冠类群中，本文称为 Percomorpha。