Opah(Lampris megalopsis)genome sheds light on the evolution of aquatic endothermy  

作　　者：Jing Bo Wen-Qi Lv Ning Sun Cheng Wang Kun Wang Pan Liu Chen-Guang Feng Shun-Ping He Lian-Dong Yang 

机构地区：[1]Institute of Deep Sea Science and Engineering,Chinese Academy of Sciences,Sanya,Hainan 572000,China [2]State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan,Hubei 430072,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]School for Ecological and Environmental Sciences,Northwestern Polytechnical University,Xi’an,Shaanxi 710000,China [5]College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China [6]Center for Excellence in Animal Evolution and Genetics,Chinese Academy of Sciences,Kunming,Yunnan 650223,China

出　　处：《Zoological Research》2022年第1期26-29,共4页动物学研究（英文）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS)(XDB42000000);National Natural Science Foundation of China(41876179)to S.P.H.,and Strategic Priority Research Program of CAS(XDB31040104);National Natural Science Foundation of China(31972866);Youth Innovation Promotion Association,CAS(http://www.yicas.cn)to L.D.Y.

摘　　要：Endothermy is the ability to generate and conserve metabolic heat to maintain body temperature above that of the surrounding environment.Endothermy enhances the physiological and ecological advantages of mammals,birds,and certain fish species.The opah,Lampris megalopsis(Lampridiformes),is the only known fish to exhibit whole-body endothermy.Currently,however,the underlying molecular mechanism for this remains unclear.Hence,the opah offers an excellent opportunity to study the evolutionary mechanism of whole-body endothermy in aquatic animals.In this study,we assembled a L.megalopsis genome(1.09 Gb in size)and performed comparative genomic analysis with ectothermic fish to reveal the genetic basis of endothermy.Based on analysis of positive selection,rapid evolution,and gene family expansion,we discovered several genes that likely contributed to thermogenesis and heat preservation.As the first reported L.megalopsis genome,our results not only clarify the possible molecular and genetic mechanisms involved in endothermic adaptation but also increase our understanding of endothermic fish biology.

关 键 词：EVOLUTION LIKELY MAINTAIN 

分 类 号：Q953[生物学—动物学]