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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

2019-10Journal 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.accessioned2020-07-24T10:51:57Z
dc.date.available2020-10-01T00:30:11Z
dc.date.issued2019-10
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 x 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 degrees C. In contrast, sporophytes from both interspecific hybrid crosses had a 2-3 degrees 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.
dc.description.sponsorshipPortuguese Science Foundation (FCT)Portuguese Foundation for Science and Technology [UID/Multi/04326/2019, MARFOR-Biodiversa/0004/2015, GENEKELP-PTDC/MAR-EST/6053/2014]
dc.description.sponsorshipFormasSwedish Research Council Formas
dc.description.sponsorshipNaturvardsverket
dc.description.sponsorshipANRFrench National Research Agency (ANR)
dc.description.sponsorshipFCTPortuguese Foundation for Science and Technology [SFRH/BPD/122567/2016]
dc.description.sponsorshipMECSpanish Government
dc.description.sponsorshipFRCT
dc.description.sponsorshipDFGGerman Research Foundation (DFG)
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1080/09670262.2019.1613571
dc.identifier.issn0967-0262
dc.identifier.issn1469-4433
dc.identifier.urihttp://hdl.handle.net/10400.1/14294
dc.language.isoeng
dc.peerreviewedyes
dc.publisherTaylor & Francis
dc.subjectIntergeneric hybridization
dc.subjectCrossing experiments
dc.subjectSaccharina-Japonica
dc.subjectSeaweed production
dc.subjectTrial cultivation
dc.subjectAlaria-esculenta
dc.subjectHigh-temperature
dc.subjectHeterosis
dc.subjectAtlantic
dc.subjectPacific
dc.titleHybrid vigour for thermal tolerance in hybrids between the allopatric kelps Laminaria digitata and L. pallida (Laminariales, Phaeophyceae) with contrasting thermal affinities
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage561
oaire.citation.issue4
oaire.citation.startPage548
oaire.citation.titleEuropean Journal of Phycology
oaire.citation.volume54
person.familyNamePearson
person.familyNameGouveia
person.familyNameTavares
person.familyNameSerrao
person.givenNameGareth Anthony
person.givenNameLicínia
person.givenNameAna I
person.givenNameEster A.
person.identifier113536
person.identifierC-6686-2012
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person.identifier.orcid0000-0003-4333-2905
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0002-5531-8476
person.identifier.orcid0000-0003-3710-7269
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridJ-3911-2013
person.identifier.ridM-7650-2013
person.identifier.scopus-author-id55916875600
person.identifier.scopus-author-id7004093604
rcaap.rightsopenAccesspt_PT
rcaap.typearticle
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