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Population genomics of an icefish reveals mechanisms of glacier-driven adaptive radiation in Antarctic notothenioids

2022-10-13Journal article Open Access
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dc.contributor.authorLu, Ying
dc.contributor.authorLi, Wenhao
dc.contributor.authorLi, Yalin
dc.contributor.authorZhai, Wanying
dc.contributor.authorZhou, Xuming
dc.contributor.authorWu, Zhichao
dc.contributor.authorJiang, Shouwen
dc.contributor.authorLiu, Taigang
dc.contributor.authorWang, Huamin
dc.contributor.authorHu, Ruiqin
dc.contributor.authorZhou, Yan
dc.contributor.authorZou, Jun
dc.contributor.authorHu, Peng
dc.contributor.authorGuan, Guijun
dc.contributor.authorXu, Qianghua
dc.contributor.authorCanario, Adelino
dc.contributor.authorChen, Liangbiao
dc.date.accessioned2022-11-04T10:51:49Z
dc.date.available2022-11-04T10:51:49Z
dc.date.issued2022-10-13
dc.date.updated2022-11-01T04:19:38Z
dc.description.abstractBackground Antarctica harbors the bulk of the species diversity of the dominant teleost fish suborder—Notothenioidei. However, the forces that shape their evolution are still under debate. Results We sequenced the genome of an icefish, Chionodraco hamatus, and used population genomics and demographic modelling of sequenced genomes of 52 C. hamatus individuals collected mainly from two East Antarctic regions to investigate the factors driving speciation. Results revealed four icefish populations with clear reproduction separation were established 15 to 50 kya (kilo years ago) during the last glacial maxima (LGM). Selection sweeps in genes involving immune responses, cardiovascular development, and photoperception occurred differentially among the populations and were correlated with population-specific microbial communities and acquisition of distinct morphological features in the icefish taxa. Population and species-specific antifreeze glycoprotein gene expansion and glacial cycle-paced duplication/degeneration of the zona pellucida protein gene families indicated fluctuating thermal environments and periodic influence of glacial cycles on notothenioid divergence. Conclusions We revealed a series of genomic evidence indicating differential adaptation of C. hamatus populations and notothenioid species divergence in the extreme and unique marine environment. We conclude that geographic separation and adaptation to heterogeneous pathogen, oxygen, and light conditions of local habitats, periodically shaped by the glacial cycles, were the key drivers propelling species diversity in Antarctica.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBMC Biology. 2022 Oct 13;20(1):231pt_PT
dc.identifier.doi10.1186/s12915-022-01432-xpt_PT
dc.identifier.eissn1741-7007
dc.identifier.urihttp://hdl.handle.net/10400.1/18474
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherBMCpt_PT
dc.rights.holderThe Author(s)
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titlePopulation genomics of an icefish reveals mechanisms of glacier-driven adaptive radiation in Antarctic notothenioidspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue20pt_PT
oaire.citation.startPage231pt_PT
oaire.citation.titleBMC Biologypt_PT
oaire.citation.volume13pt_PT
person.familyNameCanario
person.givenNameAdelino
person.identifier143624
person.identifier.ciencia-id1F1E-D3B3-F804
person.identifier.orcid0000-0002-6244-6468
person.identifier.ridC-7942-2009
person.identifier.scopus-author-id56568523700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication5f6e51ee-9113-469e-8b9e-f30f2d452521
relation.isAuthorOfPublication.latestForDiscovery5f6e51ee-9113-469e-8b9e-f30f2d452521

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