Heritability estimation via molecular pedigree reconstruction in a wild fish population reveals substantial evolutionary potential for sea-age at maturity, but not size within age-classes

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dc.contributor.author Reed, Thomas E.
dc.contributor.author Prodöhl, Paulo A.
dc.contributor.author Bradley, Caroline
dc.contributor.author Gilbey, John
dc.contributor.author McGinnity, Philip
dc.contributor.author Primmer, Craig R.
dc.contributor.author Bacon, Phil J.
dc.date.accessioned 2019-05-10T08:53:46Z
dc.date.available 2019-05-10T08:53:46Z
dc.date.issued 2018-07-30
dc.identifier.citation Reed, T. E., Prodöhl, P. A., Bradley, C., Gilbey, J., McGinnity, P., Primmer, C. R. and Bacon, P. J. (2019) 'Heritability estimation via molecular pedigree reconstruction in a wild fish population reveals substantial evolutionary potential for sea-age at maturity, but not size within age-classes', Canadian Journal of Fisheries and Aquatic Sciences, 76(5), pp. 790-805. doi: 10.1139/cjfas-2018-0123 en
dc.identifier.volume 76 en
dc.identifier.issued 5 en
dc.identifier.startpage 790 en
dc.identifier.endpage 805 en
dc.identifier.issn 0706-652X
dc.identifier.uri http://hdl.handle.net/10468/7876
dc.identifier.doi 10.1139/cjfas-2018-0123 en
dc.description.abstract While evolutionary responses require heritable variation, estimates of heritability (h2) from wild fish populations remain rare. A 20-year molecular pedigree for a wild Scottish population of Atlantic salmon (Salmo salar) was used to investigate genetic contributions to (co)variation in two important, correlated, phenotypic traits: â sea ageâ (number of winters spent at sea prior to spawning) and size-at-maturity (body length just prior to spawning). Sea age was strongly heritable (h2 = 0.51) and size exhibited moderate heritability (h2 = 0.27). A very strong genetic correlation (rG = 0.96) between these traits implied the same functional loci must underpin variation in each. Indeed, body size within sea ages had much lower heritability that did not differ significantly from zero. Thus, within wild S. salar populations, temporal changes in sea age composition could reflect evolutionary responses, whereas rapid changes of body size within sea ages are more likely due to phenotypic plasticity. These inheritance patterns will influence the scope of evolutionary responses to factors such as harvest or climate change and, hence, have management implications for salmonid populations comprising a mix of sea ages. en
dc.description.abstract Si une variation héritable est nécessaire pour permettre des réactions évolutives, les estimations de l’héritabilité (h2) obtenues pour des populations sauvages demeurent rares. Un pedigree moléculaire de 20 ans pour une population sauvage écossaise de saumons atlantiques (Salmo salar) a été utilisé pour étudier les contributions génétiques à la (co)variation de deux caractères phénotypiques corrélés importants, à savoir « l’âge marin » (le nombre d’hivers passés en mer avant le frai) et la taille à la maturité (la longueur du corps juste avant le frai). L'âge marin est fortement héritable (h2 = 0,51) et la taille présente une héritabilité modérée (h2 = 0,27). Une corrélation génétique très forte (rG = 0,96) entre ces caractères indique que les mêmes sites fonctionnels doivent sous-tendre la variation des deux caractères. En effet, la taille du corps pour des âges marins donnés présente une héritabilité beaucoup plus faible qui n’est pas significativement différente de zéro. Ainsi, dans les populations sauvages de S. salar, les changements dans le temps de la composition des âges marins pourraient refléter des reactions évolutives, alors que des changements rapides de la taille du corps au sein de classes d’âge marin sont plus probablement le fait d’une plasticité phénotypique. Ces motifs d’hérédité influenceront la portée des réactions évolutives à des facteurs comme l’exploitation ou les changements climatiques, ce qui a des conséquences pour la gestion de populations de salmonidés composées d’un mélange d’âges marins. [Traduit par la Rédaction] fr
dc.description.sponsorship Scottish Government (Marine Scotland Science Freshwater Fisheries Laboratory under Service Level Agreement FW01t); Academy of Finland (Grant Nos. 302873, 307593); Marine Institute (Beaufort Marine Research award in Fish Population Genetics under the Sea Change Programme) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher NRC Research Press en
dc.relation.uri https://doi.org/10.1139/cjfas-2018-0123
dc.rights © 2018, the Authors. Published by NRC Research Press. All rights reserved. en
dc.subject Salmonids en
dc.subject Population dynamics en
dc.subject Quantitative genetics en
dc.subject Bayesian en
dc.subject Evolvability en
dc.subject 38 adaptation en
dc.subject Management en
dc.subject Conservation genetics en
dc.title Heritability estimation via molecular pedigree reconstruction in a wild fish population reveals substantial evolutionary potential for sea-age at maturity, but not size within age-classes en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Thomas Reed, Zoology & Ecology, University College Cork, Cork, Ireland. +353-21-490-3000 Email: treed@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2019-05-09T12:17:28Z
dc.description.version Accepted Version en
dc.internal.rssid 452175151
dc.contributor.funder Scottish Government en
dc.contributor.funder European Research Council en
dc.contributor.funder Horizon 2020 en
dc.contributor.funder Academy of Finland en
dc.contributor.funder Marine Institute en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Canadian Journal of Fisheries and Aquatic Sciences en
dc.internal.copyrightchecked Yes
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress treed@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/EC/H2020::ERC::ERC-STG/639192/EU/Alternative life histories: linking genes to phenotypes to demography/ALH en
dc.identifier.eissn 1205-7533


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