黄箱鱼基因组保护与珊瑚礁适应的进化平衡。

IF 4 1区 生物学 Q1 ZOOLOGY
Shui-Mu Hu, Zhi-Xiong Zhou, Jun-Yi Yang, Zhou Jiang, Fei Pu, Qing-Ming Qu, Tao Zhou, Peng Xu
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引用次数: 0

摘要

黄箱鱼(Ostracion cubicus)表现出专门针对珊瑚礁环境的衍生形态特征和祖先特征的结合,包括融合的真皮板。相互矛盾的进化证据阻碍了扁蝽的真正分类。为了明确其在四齿形动物中的进化位置,染色体水平的基因组组装被生成,代表了迄今为止该谱系最连续和完整的基因组。值得注意的是,O. cubicus在四齿形目中拥有最大的基因组,这主要是由于广泛的转座元件扩展。基于19个全基因组和131个线粒体基因组的系统发育分析将Tetraodontiformes划分为3个主要姐妹类群(Ostraciidae-Molidae, Tetraodontidae和balistidae monacanthidae)。比较基因组学证据表明,在被调查的类群中,三角齿蛙较早地从现代四齿兽的共同祖先分化出来,并保留了最多的HOX基因。尽管整体基因组结构在很大程度上是保守的,但某些遗传和环境变化可能有助于其表型适应,包括中新世-上新世过渡期间的气候变冷、最近的DNA和长穿插核元件(LINE)转座子爆发、谱系特异性染色体重排和基因家族扩展。许多正向选择的基因和快速进化的基因与骨骼发育有关,包括bmp7、egf7和bmpr2。甲壳和尾皮的转录组学比较揭示了与甲壳形成相关的多种候选基因和途径,如postn、scpp1和TGF-β信号通路的组分。eda中衍生的氨基酸取代,加上蛋白质结构模型,表明硬骨鱼真皮板形成的潜在分子趋同。这些发现提供了对O. cubicus甲壳进化和珊瑚礁适应的基因组和发育基础的新见解,为基因组保护与监管创新之间的进化平衡提供了强有力的案例,以实现珊瑚礁专业化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evolutionary balance between genomic conservation and coral reef adaptation in the yellow boxfish ( Ostracion cubicus).

The yellow boxfish ( Ostracion cubicus) exhibits a combination of derived morphological traits specialized for coral reef environments and ancestral characteristics, including a fused dermal plate. Contradictory evolutionary evidence hinders true classification of O. cubicus. To clarify its evolutionary position within Tetraodontiformes, a chromosome-level genome assembly was generated, representing the most contiguous and complete genome to date for this lineage. Notably, O. cubicus possessed the largest genome within the order Tetraodontiformes, primarily due to extensive transposable element expansion. Phylogenetic analysis based on 19 whole genomes and 131 mitochondrial genomes resolved Tetraodontiformes into three major sister groups (Ostraciidae-Molidae, Tetraodontidae, and Balistidae-Monacanthidae). Comparative genomic evidence indicated that O. cubicus diverged early from the common ancestor of modern Tetraodontiformes and retained the highest number of HOX genes among surveyed taxa. Although overall genomic architecture was largely conserved, certain genetic and environmental changes may have contributed to its phenotypic adaptations, including climate cooling during the Miocene-Pliocene Transition, recent DNA and long interspersed nuclear element (LINE) transposon bursts, lineage-specific chromosomal rearrangements, and gene family expansion. Many positively selected genes and rapidly evolving genes were associated with skeletal development, including bmp7, egf7, and bmpr2. Transcriptomic comparisons between carapace and tail skin revealed various candidate genes and pathways related to carapace formation, such as postn, scpp1, and components of the TGF-β signaling pathway. A derived amino acid substitution in eda, coupled with protein structural modeling, suggested potential molecular convergence in dermal plate formation among teleosts. These findings provide novel insights into the genomic and developmental basis of carapace evolution and coral reef-adaptation in O. cubicus, offering a strong case for evolutionary balance between genomic conservation with regulatory innovation to achieve coral reef specialization.

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来源期刊
Zoological Research
Zoological Research Medicine-General Medicine
CiteScore
7.60
自引率
10.20%
发文量
1937
审稿时长
8 weeks
期刊介绍: Established in 1980, Zoological Research (ZR) is a bimonthly publication produced by Kunming Institute of Zoology, the Chinese Academy of Sciences, and the China Zoological Society. It publishes peer-reviewed original research article/review/report/note/letter to the editor/editorial in English on Primates and Animal Models, Conservation and Utilization of Animal Resources, and Animal Diversity and Evolution.
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