Boasting nearly 30,000 species, teleosts account for half of all extant vertebrates and approximately 98% of all ray-finned fish species (Actinopterygii). Teleosts are also the largest and most diverse group of vertebrates, exhibiting an astonishing level of morphological, physiological, and behavioral diversity. Previous studies had indicated that the teleost lineage has experienced an additional whole-genome duplication event. Recent comparative genomic analyses of teleosts and other bony vertebrates using spotted gar (a nonteleost ray-finned fish) and elephant shark (a cartilaginous fish) as outgroups have revealed several divergent features of teleost genomes. These include an accelerated evolutionary rate of protein-coding and nucleotide sequences, a higher rate of intron turnover, loss of many potential cis-regulatory elements and shorter conserved syntenic blocks. A combination of these divergent genomic features might have contributed to the evolution of the amazing phenotypic diversity and morphological innovations of teleosts.

中文翻译：

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硬骨鱼的不同基因组。

硬骨鱼类拥有近30,000种，占所有现存脊椎动物的一半，约占所有有鳍鳍鱼类（Actinopterygii）的98％。硬骨鱼类也是最大和最多样化的脊椎动物群体，表现出惊人的形态，生理和行为多样性。先前的研究表明，硬骨鱼类谱系经历了另外的全基因组复制事件。最近对硬骨鱼和其他骨质脊椎动物的比较基因组分析使用斑点雀gar（一种非teelost射线鳍鱼）和象鲨（一种软骨鱼）作为外群，发现了硬骨鱼基因组的几个不同特征。其中包括蛋白质编码和核苷酸序列的进化速度加快，内含子周转率提高，失去许多潜在的顺式调节元件和较短的保守突触阻滞。这些不同的基因组特征的结合可能有助于惊人的表型多样性的发展和硬骨鱼的形态学创新。