Remarkable consistency of exon-intron structure of hatching enzyme genes and molecular phylogenetic relationships of teleostean fishes
Remarkable consistency of exon-intron structure of hatching enzyme genes and molecular phylogenetic relationships of teleostean fishes
复制标题
硬骨鱼类孵化酶基因外显子-内含子结构与分子系统发育关系的显着一致性
DOI：
10.1007/s10641-011-9920-1
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发表时间：
2012
影响因子：
1.4
通讯作者：
Mutsumi Nishida
中科院分区：
文献类型：
--
作者：
Mari Kawaguchi;Sebastien Lavoue;Junya Hiroi;Hirofumi Hayano;Ichiro Iuchi;Shigeki Yasumasu;Mutsumi Nishida
各种鱼类在真骨鱼类中的系统发育位置经常被混淆。一个这样的混乱是在鲑形目，Esociformes，Osmeriformes，Argentiniformes和Alepocephaliformes之间的系统发育关系。基于形态学的系统发育研究表明，所有这些都属于真骨鱼类，基于分子系统发育分析表明，前四个订单属于真骨鱼类，和Alepocephaliformes的耳头目。此外，前四个目之间的系统发育关系尚未建立：形态学研究提出了各种假说，而分子分析表明，esociforms和salmoniforms是姐妹群在真硬骨鱼的基部位置。在这项研究中，我们研究了有争议的系统发育位置使用孵化酶基因的外显子-内含子结构。其基因结构具有耳首类低等动物的特征。阿根廷形目和奥氏形目与高等真骨鱼类相同，而与鲑形目和内囊形目不同。结果表明，在真硬骨鱼类中，黑头形目与耳首目亲缘关系密切，鲑形目与鞘形目为姐妹群。因此，孵化酶基因外显子-内含子结构的变化与线粒体DNA序列估计的分子系统发育关系相一致。
The phylogenetic positions of various fishes in the Teleostei are frequently confused. One such confusion is in the phylogenetic relationships among Salmoniformes, Esociformes, Osmeriformes, Argentiniformes and Alepocephaliformes. While morphology-based phylogenetic studies suggested that all of these belong to Euteleostei, molecule-based phylogenetic analyses indicated that the former four orders belong to the Euteleostei, and the Alepocephaliformes to the Otocephala. In addition, the phylogenetic relationships among the former four orders have not been established: morphological studies have proposed various hypotheses, while molecular analyses have suggested esociforms and salmoniforms to be sister groups at the basal position in euteleosts. In this study, we examined their controversial phylogenetic positions using exon-intron structures of hatching enzyme genes. The gene structures of alepocephaliforms were characteristic to those of lower otocephalans. Those of argentiniforms and osmeriforms were the same as those of higher euteleosts, but different from those of salmoniforms and esociforms. The results suggest that alepocephaliforms are closely related to otocephalans, and salmoniforms form a sister group to esociforms in euteleosts. Therefore, changes in exon-intron structure of hatching enzyme genes correspond well with the molecular phylogenetic relationship estimated from mitochondrial DNA sequences.