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首页> 外文期刊>Journal of genetics >Chromosome analysis of five Brazilian species of poison frogs (Anura: Dendrobatidae)
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Chromosome analysis of five Brazilian species of poison frogs (Anura: Dendrobatidae)

机译：五种巴西毒蛙的染色体分析（阿努拉：Dendrobatidae）

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Dendrobatid frogs have undergone an extensive systematic reorganization based on recent molecular findings. The present work describes karyotypes of the Brazilian species Adelphobates castaneoticus, A. quinquevittatus, Ameerega picta, A. galactonotus and Dendrobates tinctorius which were compared to each other and with previously described related species. All karyotypes consisted of $2n = 18$ chromosomes, except for A. picta which had $2n = 24$. The karyotypes of the Adelphobates and D. tinctorius species were highly similar to each other and to the other $2n = 18$ previously studied species, revealing conserved karyotypic characteristics in both genera. In recent phylogenetic studies, all Adelphobates species were grouped in a clade separated from the Dendrobates species. Thus, we hypothesized that their common karyotypic traits may have a distinct origin by chromosome rearrangements and mutations. In A. picta, with $2n = 24$, chromosome features of pairs from 1 to 8 are shared with other previously karyotyped species within this genus. Hence, the A. picta data reinforced that the C-banding pattern and the NOR location are species-specific traits in the genus Ameerega. Moreover, the Ameerega monophyletism proposed by previous phylogenetic studies indicates that the karyotypic differences among species in this genus result from a long divergence time.
机译：基于最近的分子发现，树蛙的青蛙经历了广泛的系统重组。目前的工作描述了巴西物种Adelphobates castaneoticus，A。quinquevittatus，Ameerega picta，A。galactonotus和Dendrobates tinctorius的核型，将它们相互比较并与先前描述的相关物种进行了比较。除A. picta的$ 2n = 24 $外，所有核型均由$ 2n = 18 $个染色体组成。 Adelphobates和D. tinctorius物种的核型彼此高度相似，并且与先前研究的其他$ 2n = 18 $物种高度相似，揭示了两个属中的保守核型特征。在最近的系统发育研究中，所有阿德福波物种都归类于与石end科物种分离的进化枝中。因此，我们假设它们的常见核型性状可能通过染色体重排和突变而具有不同的起源。在A. picta中，$ 2n = 24 $，该属中其他先前的核型化物种共有1至8对的染色体特征。因此，A。picta数据进一步证明，C带模式和NOR位置是Ameerega属的物种特定性状。此外，以前的系统发育研究提出的Ameerega单系化表明，该属中物种间的核型差异是由较长的发散时间造成的。

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