电鲶的染色体水平基因组为鲶形目进化提供了新见解。

A chromosome-level genome of electric catfish () provided new insights into order Siluriformes evolution.

作者信息

Liu Meiru, Song Yue, Zhang Suyu, Yu Lili, Yuan Zengbao, Yang Hengjia, Zhang Mengqi, Zhou Zhuocheng, Seim Inge, Liu Shanshan, Fan Guangyi, Yang Huanming

机构信息

College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049 China.

BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555 China.

出版信息

Mar Life Sci Technol. 2023 Dec 14;6(1):1-14. doi: 10.1007/s42995-023-00197-8. eCollection 2024 Feb.

UNLABELLED

The electric catfish (), belonging to the family Malapteruridae, order Siluriformes (Actinopterygii: Ostariophysi), is one of the six branches that has independently evolved electrical organs. We assembled a 796.75 Mb genome and anchored 88.72% sequences into 28 chromosomes. Gene family analysis revealed 295 expanded gene families that were enriched on functions related to glutamate receptors. Convergent evolutionary analyses of electric organs among different lineage of electric fishes further revealed that the coding gene of rho guanine nucleotide exchange factor 4-like (), which is associated with G-protein coupled receptor (GPCR) signaling pathway, underwent adaptive parallel evolution. Gene identification suggests visual degradation in catfishes, and an important role for taste in environmental adaptation. Our findings fill in the genomic data for a branch of electric fish and provide a relevant genetic basis for the adaptive evolution of Siluriformes.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s42995-023-00197-8.

未标注

电鲶（），属于鲇形目（辐鳍鱼纲：骨鳔总目）电鲶科，是六个独立进化出发电器官的分支之一。我们组装了一个796.75 Mb的基因组，并将88.72%的序列定位到28条染色体上。基因家族分析揭示了295个扩展的基因家族，这些基因家族在与谷氨酸受体相关的功能上富集。对不同电鱼谱系的发电器官进行趋同进化分析进一步表明，与G蛋白偶联受体（GPCR）信号通路相关的类rho鸟嘌呤核苷酸交换因子4（）的编码基因经历了适应性平行进化。基因鉴定表明鲶鱼存在视觉退化，味觉在环境适应中起重要作用。我们的研究结果填补了电鱼一个分支的基因组数据，并为鲇形目的适应性进化提供了相关的遗传基础。