Comparative Transcriptomics of Seasonal Phenotypic Flexibility in Two North American Songbirds

Integrative and Comparative Biology
Zachary A Cheviron, David L Swanson

Abstract

Phenotypic flexibility allows organisms to reversibly alter their phenotypes to match the changing demands of seasonal environments. Because phenotypic flexibility is mediated, at least in part, by changes in gene regulation, comparative transcriptomic studies can provide insights into the mechanistic underpinnings of seasonal phenotypic flexibility, and the extent to which regulatory responses to changing seasons are conserved across species. To begin to address these questions, we sampled individuals of two resident North American songbird species, American goldfinch (Spinus tristis) and black-capped chickadee (Poecile atricapillus) in summer and winter to measure seasonal variation in pectoralis transcriptomic profiles and to identify conserved and species-specific elements of these seasonal profiles. We found that very few genes exhibited divergent responses to changes in season between species, and instead, a core set of over 1200 genes responded to season concordantly in both species. Moreover, several key metabolic pathways, regulatory networks, and gene functional classes were commonly recruited to induce seasonal phenotypic shifts in these species. The seasonal transcriptomic responses mirror winter increases in pector...Continue Reading

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Citations

Oct 19, 2017·Integrative and Comparative Biology·Caroline M WilliamsMarcel E Visser
Dec 12, 2019·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·François VézinaAna Gabriela Jimenez
Apr 11, 2019·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Tommy Norin, Neil B Metcalfe
May 12, 2019·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·David L SwansonYufeng Zhang
Dec 6, 2020·The Journal of Experimental Biology·Ana Gabriela Jimenez
Apr 2, 2021·Integrative Organismal Biology·D L SwansonS DuBay
Mar 1, 2019·G3 : Genes - Genomes - Genetics·Ben J G SutherlandLouis Bernatchez

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