Molecular systematics of the gonorynchiform fishes (Teleostei) based on whole mitogenome sequences:: Implications for higher-level relationships within the Otocephala
Molecular systematics of the gonorynchiform fishes (Teleostei) based on whole mitogenome sequences:: Implications for higher-level relationships within the Otocephala
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DOI：
10.1016/j.ympev.2005.03.024
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发表时间：
2005-10-01
影响因子：
4.1
通讯作者：
Nishida, M
中科院分区：
文献类型：
--
作者：
Lavoué, S;Miya, M;Nishida, M
尽管淋毛目仅包括 4 科 7 属 31 种。它表现出多种多样的解剖结构，使得重建其代表之间的系统发育关系变得困难。在基部硬骨鱼中，淋鱼目属于耳头目，它们被交替地放置为耳目和Clupeiformes的姊妹类群。在此背景下，我们使用 40 个物种的完整线粒体基因组序列（本研究新确定了 6 个物种）研究了淋病目的系统发育。我们的分类学抽样包括每个淋状体属和每个主要耳头动物谱系的至少一个物种。明确比对的串联有丝分裂基因组序列（不包括 ND6 基因和控制区域）被分为五个分区（第 1、第 2 和第 3 密码子位置、tRNA 基因和 rRNA 基因），并进行分区贝叶斯分析。由此产生的系统发育树已完全解析，大多数节点都得到高后验概率的良好支持。正如预期的那样，耳头目动物被恢复为单系。在该组中，线粒体基因组数据支持Alepocephaloidei、Gonorynchiformes、Otophys 和Clupeiformes 的单系性。淋菌目和耳目形成了一个姐妹群，使耳目成为单系。这一结果与之前的线粒体基因组系统发育研究相冲突，在该研究中发现Clupeiformes和Gonorynchiformes之间存在姐妹关系。我们讨论了这种不一致的可能原因。在淋病目中，发现了以下原始拓扑：（淋病（Clianos (Phractolaemus (Cromeria (Grasseichthys (Kneria, Parakneria))））））。我们确认幼形种 Cromeria nilotica 和 Grasseichthys gabonensis 属于 Kneriidae 科；然而，这两个物种并没有形成一个单系群。这一结果挑战了还原性或缺席性状作为该组中的同源性的价值。 (c) 2005 Elsevier Inc. 保留所有权利。
Although the order Gonorynchiformes includes only 31 species assigned to seven genera and four families. it exhibits a large variety of anatomical structures, making difficult the reconstruction of phylogenetic relationships among its representatives. Within the basal teleosts, the Gonorynchiformes belong to the Otocephala where they have been alternatively placed as the sister group of the Otophysi and of the Clupeiformes. In this context, we investigated the phylogeny of the Gonorynchiformes using whole mitogenome sequences from 40 species (six being newly determined for this study). Our taxonomic sampling included at least one species of each gonorynchiform genus and of each other major otocephalan lineage. Unambiguously aligned, concatenated mitogenomic sequences (excluding the ND6 gene and control region) were divided into five partitions (1st, 2nd, and 3rd codon positions, tRNA genes, and rRNA genes) and partitioned Bayesian analyses were conducted. The resultant phylogenctic trees were fully resolved, with most of the nodes well supported by the high posterior probabilities. As expected, the Otocephala were recovered as monophyletic. Within this group, the mitogenome data supported the monophyly of Alepocephaloidei, Gonorynchiformes, Otophysi, and Clupeiformes. The Gonorynchiformes and the Otophysi formed a sister group, rending the Ostariophysi monophyletic. This result conflicts with previous mitogenomic phylogenetic studies, in which a sister relationship was found between Clupeiformes and Gonorynchiformes. We discussed the possible causes of this incongruence. Within the Gonorynchiformes, the following original topology was found: (Gonorynchus (Clianos (Phractolaemus (Cromeria (Grasseichthys (Kneria, Parakneria)))))). We confirmed that the paedomorphic species Cromeria nilotica and Grasseichthys gabonensis belong to the family Kneriidae; however, the two species together did not form a monophyletic group. This result challenges the value of reductive or absent characters as synapomorphies in this group. (c) 2005 Elsevier Inc. All rights reserved.