Insights into the Evolution of Neoteny from the Genome of the Asian Icefish Protosalanx chinensis

Insights into the Evolution of Neoteny from the Genome of the Asian Icefish Protosalanx chinensis
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从亚洲银鱼基因组洞察幼态持续演化

DOI:
10.1016/j.isci.2020.101267
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发表时间:
2020-06
期刊:
影响因子:
5.8
通讯作者:
Li Ming
Li Ming
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Zhang Jie;Qi Jiwei;Shi Fanglei;Pan Huijuan;Liu Meng;Tian Ran;Geng Yuepan;Li Huaying;Qu Yujie;Chen Jinping;Seim Inge;Li Ming

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银鱼,被称为亚洲冰鱼,代表了硬骨鱼目Protacanthopterii中的一种特殊辐射,成鱼保留幼虫的特征,如透明和小型化的身体和软骨内骨骼到成年。本文报道了分布最广的银鱼科鱼类中国大银鱼(Protosalanxchinensis)的新基因组。中华大蠊基因组的组装比以前的组装更加连续和完整。我们估计中国对虾、鲑鱼、鳟鱼和狗鱼在1.85亿年前从一个共同的祖先分化出来。与其他鱼类基因组并列显示编码外胚层发育不良-A受体(EDAR),SCPP 1和fourHox蛋白的基因丢失,可能缺乏典型的成纤维细胞生长因子5(FGF 5)功能。我们还报道了中华对虾的基因组变异,可能反映了一个物种在性成熟个体中具有幼虫表型的免疫系统库。新的亚洲冰鱼参考基因组为未来的研究提供了坚实的基础。
Salangids, known as Asian icefishes, represent a peculiar radiation within the bony fish order Protacanthopterygii where adult fish retain larval characteristics such as transparent and miniaturized bodies and a cartilaginous endoskeleton into adulthood. Here, we report ade novogenome ofProtosalanx chinensis, the most widely distributed salangid lineage. TheP. chinensisgenome assembly is more contiguous and complete than a previous assembly. We estimate thatP. chinensis, salmons, trouts, and pikes diverged from a common ancestor 185 million years ago. A juxtaposition with other fish genomes revealed loss of the genes encoding ectodysplasin-A receptor (EDAR), SCPP1, and fourHoxproteins and likely lack of canonical fibroblast growth factor 5 (FGF5) function. We also report genomic variations ofP. chinensispossibly reflecting the immune system repertoire of a species with a larval phenotype in sexually mature individuals. The new Asian icefish reference genome provides a solid foundation for future studies.
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