Genomic mapping of social behavior traits in a F2 cross derived from mice selectively bred for high aggression Public Deposited

Downloadable Content

Download PDF
Creator
  • Perkins, James
    • Affiliation: Gillings School of Global Public Health, Department of Nutrition
  • Nehrenberg, Derrick L
    • Affiliation: School of Medicine, Department of Genetics
  • Buus, Ryan J
    • Affiliation: School of Medicine, Department of Genetics
  • Wang, Shiliang
    • Affiliation: School of Medicine, Department of Cell Biology and Physiology
  • Pomp, Daniel
    • Affiliation: School of Medicine, Department of Genetics, Gillings School of Global Public Health, Carolina Center for Genome Sciences, Department of Nutrition, N.C. Cancer Hospital, UNC Lineberger Comprehensive Cancer Center, Department of Cell Biology and Physiology
  • Pardo-Manuel de Villena, Fernando
    • Affiliation: School of Medicine, Department of Genetics, Carolina Center for Genome Sciences, N.C. Cancer Hospital, UNC Lineberger Comprehensive Cancer Center
Abstract
  • Abstract Background Rapid response to selection was previously observed in mice selected for high levels of inter-male aggression based on number of attacks displayed in a novel social interaction test after isolation housing. Attack levels in this high aggression line (NC900) increased significantly within just four generations of selective breeding, suggesting the presence of a locus with large effect. We conducted an experiment using a small (n ≈ 100) F2 cross between the ICR-derived, non-inbred NC900 strain and the low aggression inbred strain C57BL/6J, genotyped for 154 fully informative SNPs, to determine if a locus with large effect controls the high-aggression selection trait. A second goal was to use high density SNP genotyping (n = 549,000) in the parental strains to characterize residual patterns of heterozygosity within NC900, and evaluate regions that are identical by descent (IBD) between NC900 and C57BL/6J, to determine what impacts these may have on accuracy and resolution of quantitative trait locus (QTL) mapping in the F2 cross. Results No evidence for a locus with major effect on aggressive behavior in mice was identified. However, several QTL with genomewide significance were mapped for aggression on chromosomes 7 and 19 and other social behavior traits on chromosomes 4, 7, 14, and 19. High density genotyping revealed that 28% of the genome is still segregating among the six NC900 females used to originate the F2 cross, and that segregating regions are present on every chromosome but are of widely different sizes. Regions of IBD between NC900 and C57BL/6J are found on every chromosome but are most prominent on chromosomes 10, 16 and X. No significant differences were found for amounts of heterozygosity or prevalence of IBD in QTL regions relative to global analysis. Conclusions While no major gene was identified to explain the rapid selection response in the NC900 line, transgressive variation (i.e. where the allele from the C57BL/6J increased attack levels) and a significant role for dominant gene action were hallmarks of the genetic architecture for aggressive behavior uncovered in this study. The high levels of heterozygosity and the distribution of minor allele frequency observed in the NC900 population suggest that maintenance of heterozygosity may have been under selection in this line.
Date of publication
Identifier
  • doi:10.1186/1471-2156-11-113
  • 21194443
Resource type
  • Article
Rights statement
  • In Copyright
Rights holder
  • Derrick L Nehrenberg et al.; licensee BioMed Central Ltd.
Journal title
  • BMC Genetics
Journal volume
  • 11
Journal issue
  • 1
Page start
  • 113
Language
  • English
Is the article or chapter peer-reviewed?
  • Yes
ISSN
  • 1471-2156
Bibliographic citation
  • BMC Genetics. 2010 Dec 31;11(1):113
Access
  • Open Access
Publisher
  • BioMed Central Ltd
Parents:

This work has no parents.

Items