No postnatal maternal effect on male aggressiveness in wild-derived strains of house mice
Article first published online: 15 OCT 2010
© 2010 Wiley-Liss, Inc.
Volume 37, Issue 1, pages 48–55, January/February 2011
How to Cite
Ďureje, L., Bímová, B. V. and Piálek, J. (2011), No postnatal maternal effect on male aggressiveness in wild-derived strains of house mice. Aggr. Behav., 37: 48–55. doi: 10.1002/ab.20371
- Issue published online: 3 DEC 2010
- Article first published online: 15 OCT 2010
- Manuscript Accepted: 19 AUG 2010
- Manuscript Received: 6 NOV 2009
- Agency of the Academy of Sciences of the Czech Republic. Grant Number: KJB600930701
- wild-derived inbred strains;
- house mouse;
- Mus musculus
Male aggressiveness is a complex behavior influenced by a number of genetic and non-genetic factors. Traditionally, the contribution of each of these factors has been established from experiments using artificially selected strains for high/low aggressive phenotypes. However, little is known about the factors underlying aggressive behavior in natural populations. In this study, we assess the influence of genetic background vs. postnatal maternal environment using a set of cross-fostering experiments between two wild-derived inbred strains, displaying high (STRA, derived from Mus musculus domesticus) and low (BUSNA, derived from Mus musculus musculus) levels of aggressiveness. The role of maternal environment was tested in males with the same genetic background (i.e. strain origin) reared under three different conditions: unfostered (weaned by mother), infostered (weaned by an unfamiliar dam from the same strain), and cross-fostered (weaned by a dam from a different strain). All males were tested against non-aggressive opponents from the A/J inbred strain. Resource-holding potential was assessed through body weight gains and territory ownership. The STRA males were shown to be aggressive in both neutral cage and resident-intruder tests. On the contrary, the BUSNA males were less aggressive in all tests. We did not find a significant effect of postnatal maternal environment; however, we detected significant maternal effect on body weight with differences between the strains, fostering type and interactions between these factors. We conclude that the aggressiveness preserved in the two strains has significant genetic component whose genetic basis can be dissected by quantitative trait loci analysis. Aggr. Behav. 37:48–55, 2011. © 2010 Wiley-Liss, Inc.