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Hybrid vigour for thermal tolerance in hybrids between the allopatric kelps Laminaria digitata and L. pallida (Laminariales, Phaeophyceae) with contrasting thermal affinities

2019Journal article Restricted access
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dc.contributor.authorMartins, Neusa
dc.contributor.authorPearson, Gareth
dc.contributor.authorGouveia, Licínia
dc.contributor.authorTavares, Ana I
dc.contributor.authorSerrao, Ester
dc.contributor.authorBartsch, Inka
dc.date.accessioned2020-07-10T08:10:20Z
dc.date.available2020-07-10T08:10:20Z
dc.date.issued2019
dc.description.abstractKelps are globally important bioengineering species with high ecological and economic value, but are increasingly threatened by climate-driven geographic range shifts. The inheritance of economically important traits from parents to offspring is poorly understood in kelps but it is of utmost interest to seaweed farmers wishing to select strains with superior performance and resilience to environmental change. For two allopatric kelp species (N-Atlantic Laminaria digitata and S-Atlantic L. pallida), we compared the speed of gametogenesis and reproductive success in parental gametophytes, and produced intraspecific and reciprocal interspecific crosses of female × male gametophyte parents isolated from the two species. We then compared the upper thermal resilience of microscopic and macroscopic sibling sporophytes in an exposure experiment over two weeks. The upper thermal limit of the sporophytes resulting from intraspecific crosses of the two species deviated by 1°C. In contrast, sporophytes from both interspecific hybrid crosses had a 2–3°C higher upper thermal tolerance than single species sporophytes, indicating heterosis for thermal tolerance. This phenotypic response appears partially sex-dependent in our study, with female parents being more important in determining the thermal-response phenotype than male parents. The presence of male gametophytes generally enhanced female reproductive success. Both gametogenesis rate and reproductive success differed among the types of reciprocal crosses. Although the interspecific crosses were artificial in an ecological sense, they may provide a tool for understanding the molecular basis of heterosis and thermal tolerance in kelps (e.g. by investigating species-specific gene expression), or for aquaculture breeding programmes against a background of rapid environmental change.pt_PT
dc.description.sponsorshipFCT: UID/Multi/04326/2019, MARFOR-Biodiversa/0004/2015 and GENEKELP-PTDC/MAR-EST/6053/2014. SFRH/BPD/122567/2016pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1080/09670262.2019.1613571pt_PT
dc.identifier.issn0967-0262
dc.identifier.urihttp://hdl.handle.net/10400.1/14065
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francispt_PT
dc.subjectBrown algapt_PT
dc.subjectThermal adaptationpt_PT
dc.subjectGametogenesispt_PT
dc.subjectReproductive successpt_PT
dc.subjectHeterosispt_PT
dc.subjectInterspecific hybridizationpt_PT
dc.subjectInheritancept_PT
dc.titleHybrid vigour for thermal tolerance in hybrids between the allopatric kelps Laminaria digitata and L. pallida (Laminariales, Phaeophyceae) with contrasting thermal affinitiespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage561pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage548pt_PT
oaire.citation.titleEuropean Journal of Phycologypt_PT
oaire.citation.volume54pt_PT
person.familyNamePearson
person.familyNameTavares
person.familyNameSerrao
person.givenNameGareth Anthony
person.givenNameAna I
person.givenNameEster A.
person.identifier113536
person.identifierC-6686-2012
person.identifier.ciencia-id1D1A-4459-86D8
person.identifier.ciencia-id3315-9919-1A52
person.identifier.ciencia-idF51B-581B-1F8B
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0003-4333-2905
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0003-3710-7269
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id55916875600
person.identifier.scopus-author-id7004093604
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication0a10c448-c7f5-4c3b-9488-3917c707e35e
relation.isAuthorOfPublication71304260-c198-4808-8671-35ce6603cc51
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery45ccfe90-155c-4d6f-9e86-8f0fd064005f

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