Genomes of Two Flying Squid Species Provide Chek for Novel Insights into Adaptations of Cephalopods to Pelagic Life
- Author:
Li MIN
1
,
2
,
3
;
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
2. Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China
3. 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.
