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Originally published as Genetics Published Articles Ahead of Print on September 15, 2004.
Genetics, Vol. 169, 855-862, February 2005, Copyright © 2005
doi:10.1534/genetics.104.031492
Mapping Quantitative Trait Loci for Anxiety in Chromosome Substitution Strains of Mice
Jonathan B. Singer*,
,1,
Annie E. Hill
,
Joseph H. Nadeau
,
and
Eric S. Lander*,
* Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142
Department of Genetics, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106
Center for Computational Genomics and Systems Biology, Case Western Reserve University, Cleveland, Ohio 44106
Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
1 Corresponding author: Clinical Pharmacogenetics, Novartis Institutes for BioMedical Research, 250 Massachusetts Ave., Cambridge, MA 02139.
E-mail: jonathan.singer{at}pharma.novartis.com
Anxious behavior in the mouse is a complex quantitative phenotype that varies widely among inbred mouse strains. We examined a panel of chromosome substitution strains bearing individual A/J chromosomes in an otherwise C57BL/6J background in open-field and light-dark transition tests. Our results confirmed previous reports of quantitative trait loci (QTL) on chromosomes 1, 4, and 15 and identified novel loci on chromosomes 6 and 17. The studies were replicated in two separate laboratories. Systematic differences in the overall activity level were found between the two facilities, but the presence of the QTL was confirmed in both laboratories. We also identified specific effects on open-field defecation and center avoidance and distinguished them from overall open-field activity.
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