5S rDNA variation and its phylogenetic inference in the genus Leporinus (Characiformes: Anostomidae)
5S rDNA variation and its phylogenetic inference in the genus Leporinus (Characiformes: Anostomidae)
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DOI：
10.1007/s10709-006-0005-6
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发表时间：
2007-03-01
期刊：
影响因子：
1.5
通讯作者：
Martins, Cesar
中科院分区：
文献类型：
--
作者：
Ferreira, Irani A.;Oliveira, Claudio;Martins, Cesar
5S rDNA序列已被证明是有价值的遗传标记，以区分密切相关的物种，也在基因组中的重复序列的动态的理解。为了加深对兔脂鲤属（Anostomidae）进化历史的了解，同时也为理解5SrDNA序列在鱼类基因组中的组织结构做出贡献，对该属7种鱼类的5SrDNA序列进行了分析。5S rRNA基因序列在兔属物种中高度保守，而NTS表现出与插入、缺失、微重复和碱基替换相关的高水平变异。系统发育分析的5S rDNA序列聚类的物种分为两个分支是在协议的细胞遗传学和形态学数据。
5S rDNA sequences have proven to be valuable as genetic markers to distinguish closely related species and also in the understanding of the dynamic of repetitive sequences in the genomes. In the aim to contribute to the knowledge of the evolutionary history of Leporinus (Anostomidae) and also to contribute to the understanding of the 5S rDNA sequences organization in the fish genome, analyses of 5S rDNA sequences were conducted in seven species of this genus. The 5S rRNA gene sequence was highly conserved among Leporinus species, whereas NTS exhibit high levels of variations related to insertions, deletions, microrepeats, and base substitutions. The phylogenetic analysis of the 5S rDNA sequences clustered the species into two clades that are in agreement with cytogenetic and morphological data.