Molecular phylogeny and evolution of the freshwater eel, genus Anguilla
Molecular phylogeny and evolution of the freshwater eel, genus Anguilla
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DOI：
10.1006/mpev.2001.0959
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发表时间：
2001-09-01
影响因子：
4.1
通讯作者：
Tsukamoto, K
中科院分区：
文献类型：
--
作者：
Aoyama, J;Nishida, M;Tsukamoto, K
对安圭拉属所有已知的产卵鳗鱼物种进行了分子系统发育分析，以评估它们的关系和进化历史。对线粒体16S核糖体RNA共1427 bp和完整细胞色素b基因序列1140 bp的分析表明，鳗鲡属起源于单系，其中A. Borneensis是最基础的种。指出了与其地理范围相对应的四个进化枝/物种组，印度-大西洋（三个物种）、大洋洲（两个物种）、热带太平洋（两个物种）和印度-太平洋（五个物种），日本粳稻和莱茵哈蒂的位置不明确。这种分组与之前的形态学研究的分组相冲突，因为宽的不分开的上颌骨和短鳍类型被认为在系统发育上很重要，但在分子分析中是并系的。然而，分子系统发育和目前物种的地理分布表明，根据特提斯走廊假说，鳗鱼属的历史分散，该假说提出鳗鱼起源于现今印度尼西亚附近，并沿着古环地球赤道流向西扩散。向西移动的菌株通过特提斯海进入古大西洋，是当今欧洲和美洲物种的祖先。 (C) 2001 年学术出版社。
A molecular phylogenetic analysis was conducted on all of the known catadromous eel species of the genus Anguilla to assess their relationships and evolutionary history. The analyses of a total of 1427 bp of the mitochondrial 16S ribosomal RNA and 1140 bp of the complete cytochrome b gene sequences suggested that the genus Anguilla was monophyletic in origin, with A. borneensis as the most basal species. Four clades/species groups that correspond to their geographical ranges were indicated, Indo-Atlantic (three species), Oceania (two species), tropical Pacific (two species), and Indo-Pacific (five species), with ambiguous positions for A. japonica and A reinhardti. This grouping conflicts with that of a previous morphological study, since the broad undivided maxillary and short-fin type, which were thought to be phylogenetically important, were paraphyletic in the molecular analysis. However, the molecular phylogeny and the present geographic distribution of species suggested historical dispersion of the genus Anguilla according to the Tethys corridor hypothesis, which proposed that anguillid eels originated near present-day Indonesia and dispersed westward along paleo-circumglobal equatorial currents. The westward-moving strain entered the paleo-Atlantic thyough the Tethys Sea and was ancestral to present-day European and American species. (C) 2001 Academic Press.