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Genomes of Two Flying Squid Species Provide Novel Insights into Adaptations of Cephalopods to Pelagic Life

Genomics, Proteomics & Bioinformatics 2022年第6期20卷 1053-1065页

作者： Min Li Baosheng Wu Peng Zhang Ye Li Wenjie Xu Kun Wang Qiang Qiu Jun Zhang Jie Li Chi Zhang Jiangtao Fan Chenguang Feng Zuozhi Chen South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou 510300China School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710072China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Key Laboratory for Sustainable Utilization of Open-Sea Fishery Ministry of Agriculture and Rural AffairsGuangdong Provincial Key Laboratory of Fishery Ecology and EnvironmentGuangzhou 510300China Qinghai Provincial Key Laboratory of Crop Molecular Breeding CAS Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXining 810008China CAS Key Laboratory of Aquatic Biodiversity and Conservation Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China

Pelagic cephalopods have evolved a series of fascinating traits,such as excellent visual acuity,high-speed agility,and photophores for adaptation to open pelagic ***,the genetic mechanisms underpinning these traits are not well ***,in this study,we obtained high-quality genomes of two purpleback flying squid species(Sthenoteuthis oualaniensis and Sthenoteuthis sp.),with sizes of 5450 Mb and 5651 Mb,*** genomic analyses revealed that the S-crystallin subfamily SL20-1 associated with visual acuity in the purpleback flying squid lineage was significantly expanded,and the evolution of high-speed agility for the species was accompanied by significant positive selection pressure on genes related to energy *** molecular signals might have contributed to the evolution of their adaptative predatory and anti-predatory *** addition,the transcriptomic analysis provided clear indications of the evolution of the photophores of purpleback flying squids,especially the recruitment of new genes and energy metabolism-related genes which may have played key functional roles in the process.

关键词： Cephalopoda Evolution Flying squid Genome photophore

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