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    Genes Brain Behav. 2008 Oct;7(7):761-9.

    Identification of quantitative trait loci for locomotor activation and anxiety using closely related inbred strains.

    Source

    Genomics Institute of the Novartis Research Foundation, Department of Genetics, San Diego, CA, USA.

    Abstract

    We carried out a quantitative trait loci (QTL) mapping experiment in two phenotypically similar inbred mouse strains, C57BL/6J and C58/J, using the open-field assay, a well-established model of anxiety-related behavior in rodents. This intercross was initially carried out as a control cross for an ethylnitrosurea mutagenesis mapping study. Surprisingly, although open-field behavior is similar in the two strains, we identified significant QTL in their F2 progeny. Marker regression identified a locus on Chr 8 having associations with multiple open-field measures and a significant interaction between loci on Chr 13 and 17. Together, the Chr 8 locus and the interaction effect form the core set of QTL controlling these behaviors with additional loci on Chr 1 and 6 present in a subset of the behaviors.

    PMID:
    19130624
    [PubMed - indexed for MEDLINE]
    PMCID: PMC2888940
    Free PMC Article

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