Genomes of Two Flying Squid Species Provide Chek for Novel Insights into Adaptations of Cephalopods to Pelagic Life
- Author:
Li MIN
1
;
Wu BAOSHENG
;
Zhang PENG
;
Li YE
;
Xu WENJIE
;
Wang KUN
;
Qiu QIANG
;
Zhang JUN
;
Li JIE
;
Zhang CHI
;
Fan JIANGTAO
;
Feng CHENGUANG
;
Chen ZUOZHI
Author Information
1. South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510300,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China;Key Laboratory for Sustainable Utilization of Open-Sea Fishery,Ministry of Agriculture and Rural Affairs,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment,Guangzhou 510300,China
- Keywords:
Cephalopoda;
Evolution;
Flying squid;
Genome;
Photophore
- From:
Genomics, Proteomics & Bioinformatics
2022;(6):1053-1065
- CountryChina
- Language:Chinese
-
Abstract:
Pelagic cephalopods have evolved a series of fascinating traits,such as excellent visual acuity,high-speed agility,and photophores for adaptation to open pelagic oceans.However,the genetic mechanisms underpinning these traits are not well understood.Thus,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,respectively.Comparative genomic analyses revealed that the S-crystallin subfamily SL20-1 associated with visual acuity in the purple-back 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 meta-bolism.These molecular signals might have contributed to the evolution of their adaptative preda-tory and anti-predatory traits.In 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 pro-cess.
