Abstract
The interaction between genotype and environment is an important feature of the process of development. We investigate this interaction by examining the influence of postnatal cross-fostering and post-weaning cross-housing on the behavioral development of 129S and B6 mice. Following cross-fostering, we found significant alterations in the frequency of maternal care as a function of maternal strain and pup type as well as interactions between these variables. In adulthood, we find there are sex-specific and strain-specific alterations in anxiety-like behavior as a function of rearing environment, with males exhibiting more pronounced rearing-induced effects. Mixed-strain housing of weanlings was found to lead to alterations in home-cage social and feeding behavior as well as changes in adult anxiety-like responses of 129S mice. Anxiety-like behavior in B6 mice was altered as a function of the interaction between housing condition and weaning weight. These data illustrate the complex pathways through which early and later social experiences may lead to variations in behavior.
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This research was supported by Grant Number DP2OD001674 from the Office of the Director, National Institutes of Health, a Nuffield Foundation Studentship to AM, and the Leverhulme Trust.
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Curley, J.P., Rock, V., Moynihan, A.M. et al. Developmental Shifts in the Behavioral Phenotypes of Inbred Mice: The Role of Postnatal and Juvenile Social Experiences. Behav Genet 40, 220–232 (2010). https://doi.org/10.1007/s10519-010-9334-4
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DOI: https://doi.org/10.1007/s10519-010-9334-4