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Identifying loci for behavioral traits using genome-tagged mice
Dahai Liu1, Ram Pyare Singh, Arshad H Khan
1Department of Molecular and Medical Pharmacology, UCLA School of Medicine, Los Angeles, California 90095-1735, USA.
Journal of Neuroscience Research
|November 5, 2003
Summary
Genome-tagged mice (GTMs) improve the mapping of complex behavioral traits. This study confirmed learning and memory loci and mapped new behavioral loci using GTMs, enhancing reproducibility in mouse genetics.
Area of Science:
- Neuroscience
- Genetics
- Behavioral Science
Background:
- Complex trait mapping for behavioral loci often lacks precision and reproducibility.
- Genome-tagged mice (GTMs) offer a potential solution with overlapping congenic strains for enhanced mapping power.
Purpose of the Study:
- To utilize GTMs for superior localization and confirmation of behavioral trait loci in mice.
- To assess the effectiveness of GTMs in mapping genes associated with learning, memory, and other behavioral responses.
Main Methods:
- Employed three GTM strains with introgressed DBA/2J genomic intervals on a C57BL/6J background.
- Focused on chromosomal regions previously linked to learning and memory.
- Analyzed GTMs for mapping loci related to prepulse inhibition, acoustic startle, and locomotor activity.
Main Results:
- Confirmed previously identified loci for learning and memory.
- Fine-mapped a learning and memory locus on chromosome 3 to an 8.8-cM region.
- Successfully mapped loci for prepulse inhibition, acoustic startle response, and spontaneous locomotor activity.
Conclusions:
- GTMs provide a powerful and reproducible resource for mapping complex behavioral trait loci in mice.
- This approach enhances the precision of gene localization for behavioral phenotypes.