Ontogenetic changes in embryonic and brain gene expression in progeny produced from migratory and residentOncorhynchus mykiss

Garrett J. McKinney; Matthew C. Hale; Giles Goetz; Michael Gribskov; Frank P. Thrower; Krista M. Nichols

doi:10.1111/mec.13143

journal article Apr 01, 2015

Ontogenetic changes in embryonic and brain gene expression in progeny produced from migratory and residentOncorhynchus mykiss

Garrett J. McKinney Matthew C. Hale Giles Goetz Michael Gribskov

Frank P. Thrower Krista M. Nichols

Molecular Ecology Vol. 24 No. 8 pp. 1792-1809 · Wiley

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Abstract

AbstractLittle information has been gathered regarding the ontogenetic changes that contribute to differentiation between resident and migrant individuals, particularly before the onset of gross morphological and physiological changes in migratory individuals. The aim of this study was to evaluate gene expression during early development inOncorhynchus mykisspopulations with different life histories, in a tissue known to integrate environmental cues to regulate complex developmental processes and behaviours. We sampled offspring produced from migrant and resident parents, collecting whole embryos prior to the beginning of first feeding, and brain tissue at three additional time points over the first year of development.RNAsequencing for 32 individuals generated a reference transcriptome of 30 177 genes that passed count thresholds. Differential gene expression between migrant and resident offspring was observed for 1982 genes. The greatest number of differentially expressed genes occurred at 8 months of age, in the spring a full year before the obvious physiological transformation from stream‐dwelling parr to sea water‐adaptable smolts begins for migrant individuals. Sex and age exhibited considerable effects on differential gene expression between migrants and resident offspring. Differential gene expression was observed in genes previously associated with migration, but also in genes previously unassociated with early life history divergence. Pathway analysis revealed coordinated differential expression in genes related to phototransduction, which could modulate photoperiod responsiveness and variation in circadian rhythms. The role for early differentiation in light sensitivity and biological rhythms is particularly intriguing in understanding early brain processes involved in differentiation of migratory and resident life history types.

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Details

Published: Apr 01, 2015
Vol/Issue: 24(8)
Pages: 1792-1809
License: View

Authors

G

Garrett J. McKinney

Department of Biological Sciences Purdue University West Lafayette IN 47907 USA; School of Aquatic and Fishery Sciences University of Washington Seattle WA 98195‐5020 USA

M

Matthew C. Hale

Department of Biological Sciences Purdue University West Lafayette IN 47907 USA

G

Giles Goetz

Conservation Biology Division Northwest Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle WA 98112 USA

M

Michael Gribskov

Department of Biological Sciences Purdue University West Lafayette IN 47907 USA

F

Frank P. Thrower

Ted Stevens Marine Research Institute Alaska Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Juneau AK 99801 USA

K

Krista M. Nichols

Department of Biological Sciences Purdue University West Lafayette IN 47907 USA; Conservation Biology Division Northwest Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle WA 98112 USA

Funding

National Science Foundation Award: NSF-DEB-0845265

Cite This Article

Garrett J. McKinney, Matthew C. Hale, Giles Goetz, et al. (2015). Ontogenetic changes in embryonic and brain gene expression in progeny produced from migratory and residentOncorhynchus mykiss. Molecular Ecology, 24(8), 1792-1809. https://doi.org/10.1111/mec.13143

Ontogenetic changes in embryonic and brain gene expression in progeny produced from migratory and residentOncorhynchus mykiss

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