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Gene expression in the phenotypically plastic Arctic charr (Salvelinus alpinus): A focus on growth and ossification at early stages of development

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor Háskólinn á Hólum
dc.contributor Hólar University College
dc.contributor.author Beck, Samantha V.
dc.contributor.author Räsänen, Katja
dc.contributor.author Ahi, Ehsan P.
dc.contributor.author Kristjánsson, Bjarni K.
dc.contributor.author Skúlason, Skúli
dc.contributor.author Jónsson, Zophonías Oddur
dc.contributor.author Leblanc, Camille
dc.date.accessioned 2020-10-14T14:07:31Z
dc.date.available 2020-10-14T14:07:31Z
dc.date.issued 2018-11-26
dc.identifier.citation Beck, SV, Räsänen, K, Ahi, EP, et al. Gene expression in the phenotypically plastic Arctic charr (Salvelinus alpinus): A focus on growth and ossification at early stages of development. Evolution & Development. 2019; 21: 16– 30. https://doi.org/10.1111/ede.12275
dc.identifier.issn 1520-541X
dc.identifier.uri https://hdl.handle.net/20.500.11815/2119
dc.description Publisher's version (útgefin grein)
dc.description.abstract Gene expression during development shapes the phenotypes of individuals. Although embryonic gene expression can have lasting effects on developmental trajectories, few studies consider the role of maternal effects, such as egg size, on gene expression. Using qPCR, we characterize relative expression of 14 growth and/or skeletal promoting genes across embryonic development in Arctic charr (Salvelinus alpinus). We test to what extent their relative expression is correlated with egg size and size at early life‐stages within the study population. We predict smaller individuals to have higher expression of growth and skeletal promoting genes, due to less maternal resources (i.e., yolk) and prioritization of energy toward ossification. We found expression levels to vary across developmental stages and only three genes (Mmp9, Star, and Sgk1) correlated with individual size at a given developmental stage. Contrary to our hypothesis, expression of Mmp9 and Star showed a non‐linear relationship with size (at post fertilization and hatching, respectively), whilst Sgk1 was higher in larger embryos at hatching. Interestingly, these genes are also associated with craniofacial divergence of Arctic charr morphs. Our results indicate that early life‐stage variation in gene expression, concomitant to maternal effects, can influence developmental plasticity and potentially the evolution of resource polymorphism in fishes.
dc.description.sponsorship We thank John Postlethwait for his valuable comments on the manuscript. This research was funded by the Icelandic Research Fund, Rannis (grant number 141360 to CAL et al., and grant number 173814–051 to SVB).
dc.format.extent 16-30
dc.language.iso en
dc.publisher Wiley
dc.relation.ispartofseries Evolution & Development;21(1)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Developmental Biology
dc.subject Bleikja
dc.subject Embryo
dc.subject Gene expression
dc.subject Þroskunarfræði
dc.subject Þroskunarerfðafræði
dc.title Gene expression in the phenotypically plastic Arctic charr (Salvelinus alpinus): A focus on growth and ossification at early stages of development
dc.type info:eu-repo/semantics/article
dcterms.license This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.description.version Peer Reviewed
dc.identifier.journal Evolution and Development
dc.identifier.doi 10.1111/ede.12275
dc.relation.url https://onlinelibrary.wiley.com/doi/full/10.1111/ede.12275
dc.contributor.department Líf- og umhverfisvísindastofnun (HÍ)
dc.contributor.department Institute of Life and Environmental Sciences (UI)
dc.contributor.department Fiskeldis- og fiskalíffræðideild (HH)
dc.contributor.department Department of Aquaculture and Fish Biology (HUC)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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