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

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

机构地区：[1]College of Life Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [2]BGI-Qingdao,BGI-Shenzhen,Qingdao 266555,China [3]BGI-Shenzhen,Shenzhen 518083,China [4]Professional Committee of Native Aquatic Organisms and Water Ecosystem of China Fisheries Association,Beijing 100125,China [5]Integrative Biology Laboratory,College of Life Sciences,Nanjing Normal University,Nanjing 210023,China [6]State Key Laboratory of Agricultural Genomics,BGI-Shenzhen,Shenzhen 518083,China

出　　处：《Marine Life Science & Technology》2024年第1期1-14,共14页海洋生命科学与技术（英文）

基　　金：supported by the major scientific and technological projects of Hainan Province(ZDKJ2019011);the special funding of“Blue granary”scientific and technological innovation of China(2018YFD0900301-05).

摘　　要：The electric catfish(Malapterurus electricus),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 M.electricus 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(arhgef4),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.

关 键 词：Electric fish Karyotype analysis Convergent evolution Environmental adaptation Historical effective population size 

分 类 号：Q178.53[生物学—水生生物学]