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Whole-Genome Sequencing of Inbred Mouse Strains Selected for High and Low Open-Field Activity

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Abstract

We conducted whole-genome sequencing of four inbred mouse strains initially selected for high (H1, H2) or low (L1, L2) open-field activity (OFA), and then examined strain distribution patterns for all DNA variants that differed between their BALB/cJ and C57BL/6J parental strains. Next, we assessed genome-wide sharing (3,678,826 variants) both between and within the High and Low Activity strains. Results suggested that about 10% of these DNA variants may be associated with OFA, and clearly demonstrated its polygenic nature. Finally, we conducted bioinformatic analyses of functional genomics data from mouse, rat, and human to refine previously identified quantitative trait loci (QTL) for anxiety-related measures. This combination of sequence analysis and genomic-data integration facilitated refinement of previously intractable QTL findings, and identified possible genes for functional follow-up studies.

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Data availability

Raw reads from the 8 individuals sequenced have been deposited in the Sequence Read Archive (https://www.ncbi.nlm.nih.gov/sra) with accession PRJNA605645.

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Acknowledgements

We would like to thank Dr. Erich J Baker for his assistance with GeneWeaver updates and functions.

Funding

This study was funded by NIDA and NIAAA (Grant No. R01 AA019776) and NIMH (Grant No. R01 MH100141-06). R01 AA018776 (NIH NIDA and NIAAA) to EJC. R01 MH100141-06 (NIMH to Matthew C. Keller) supports LME. R21 MH116263A (NIMH) supports CAL.

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Correspondence to Marissa A. Ehringer.

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Conflict of interest

Aimee L. Thomas, Luke M. Evans, Michaela D. Nelsen, Elissa J. Chesler, Matthew S. Powers, Winona C. Booher, Christopher A. Lowry, John C. DeFries, Marissa A. Ehringer have no conflict of interest to declare.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

Human and animal rights and informed consent

The local Institutional Animal Care and Use Committee (IACUC) approved all protocols using the guidelines set forth by the Office of Laboratory Animal Welfare. All animal protocols were approved by the IACUC and follow all international regulations for human treatment. No human subjects were involved in the study.

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Thomas, A.L., Evans, L.M., Nelsen, M.D. et al. Whole-Genome Sequencing of Inbred Mouse Strains Selected for High and Low Open-Field Activity. Behav Genet 51, 68–81 (2021). https://doi.org/10.1007/s10519-020-10014-y

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  • DOI: https://doi.org/10.1007/s10519-020-10014-y

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