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首页> 外文期刊>Journal of Applied Ichthyology >Extensive genome duplications in sturgeons: new evidence from microsatellite data.
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Extensive genome duplications in sturgeons: new evidence from microsatellite data.

机译：st鱼中广泛的基因组重复：来自微卫星数据的新证据。

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摘要

Genome duplications and polyploidization events are thought to have played relevant roles in the early stages of vertebrate evolution, in particular near the time of divergence of the lamprey lineage. Additional genome duplications, specifically in ray-finned fish, may have occurred before the divergence of the teleosts. The role of polyploidization in vertebrate genome evolution is a thriving area of research. Sturgeons (order Acipenseriformes) provide a unique model for the investigation of genome duplication, with existing species possessing 120, 250 or 360 chromosomes. In the present study, data from 240 sturgeon specimens representing 11 species were used for analysis of ploidy levels. Allele numbers were assessed at eleven microsatellite loci. The results provide further evidence for functional diploidy, tetraploidy and hexaploidy in species possessing 120, 250 and 360 chromosomes, respectively. The analysis also uncovered novel evidence for functional hexaploidy in the shortnose sturgeon (Acipenser brevirostrum). In conclusion, the process of functional genome reduction is demonstrated to be an on-going process in this fish lineage.
机译：人们认为基因组重复和多倍体化事件在脊椎动物进化的早期阶段，特别是在七the鳗谱系发散的时间附近，起着相关的作用。在硬骨鱼发散之前，可能发生了其他基因组重复，特别是在鳍鳍鱼中。多倍体化在脊椎动物基因组进化中的作用是一个蓬勃发展的研究领域。 urge鱼（Acipenseriformes）为研究基因组重复提供了独特的模型，现有物种拥有120、250或360个染色体。在本研究中，使用来自代表11个物种的240个urge鱼标本的数据来分析倍性水平。在11个微卫星基因座上评估了等位基因数量。该结果提供了分别具有120、250和360个染色体的物种的功能二倍体，四倍体和六倍体的进一步证据。该分析还发现了短鼻st（Acipenser brevirostrum）中功能性六倍体的新证据。总之，功能基因组减少的过程被证明是该鱼类谱系中正在进行的过程。

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