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Epigenetics and early domestication: differences in hypothalamic DNA methylation between red junglefowl divergently selected for high or low fear of humans
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-5508-4465
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.
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2018 (English)In: Genetics Selection Evolution, ISSN 0999-193X, E-ISSN 1297-9686, Vol. 50, article id 13Article in journal (Refereed) Published
Abstract [en]

Background: Domestication of animals leads to large phenotypic alterations within a short evolutionary time-period. Such alterations are caused by genomic variations, yet the prevalence of modified traits is higher than expected if they were caused only by classical genetics and mutations. Epigenetic mechanisms may also be important in driving domesticated phenotypes such as behavior traits. Gene expression can be modulated epigenetically by mechanisms such as DNA methylation, resulting in modifications that are not only variable and susceptible to environmental stimuli, but also sometimes transgenerationally stable. To study such mechanisms in early domestication, we used as model two selected lines of red junglefowl (ancestors of modern chickens) that were bred for either high or low fear of humans over five generations, and investigated differences in hypothalamic DNA methylation between the two populations. Results: Twenty-two 1-kb windows were differentially methylated between the two selected lines at p amp;lt; 0.05 after false discovery rate correction. The annotated functions of the genes within these windows indicated epigenetic regulation of metabolic and signaling pathways, which agrees with the changes in gene expression that were previously reported for the same tissue and animals. Conclusions: Our results show that selection for an important domestication-related behavioral trait such as tameness can cause divergent epigenetic patterns within only five generations, and that these changes could have an important role in chicken domestication.

Place, publisher, year, edition, pages
BIOMED CENTRAL LTD , 2018. Vol. 50, article id 13
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Genetics
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URN: urn:nbn:se:liu:diva-147381DOI: 10.1186/s12711-018-0384-zISI: 000428936800001PubMedID: 29609558OAI: oai:DiVA.org:liu-147381DiVA, id: diva2:1206993
Note

Funding Agencies|research council Formas, Vetenskapsradet; European Research Council, ERC [322206 GENEWELL]

Available from: 2018-05-18 Created: 2018-05-18 Last updated: 2018-06-04

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Bélteky, JohanAgnvall, BeatrixBektic, LejlaHöglund, AndreyJensen, PerGuerrero Bosagna, Carlos
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