Table 1.

Description of the mouse populations used in this study.

Mouse population	Description	Sex (females, males)	Average age (days)	Breeding environment
Wild	Wild M. m. domesticus mice (n = 203) caught in the region of Espelette, south-west France	83, 120	Undetermined	Nature
HL-Lab	The 15th generation of an advanced intercross line (n = 225) from parental M. m. domesticus strains MRL/MpJ, NZM2410/J, BXD2/TyJ, and wild-derived M. m. castaneus strain CAST/EiJ purchased from the Jackson Laboratory (Maine, USA)	153, 72	176	Animal facility, University of Luebeck, Germany
MPI-Lab	Mixed collection of M. m. domesticus composed of (i) WSB/EiJ (n = 9); (ii) two groups that originated from wild-caught mice, subsequently kept under laboratory environment for a decade: Cologne/Bonn, Germany referred to as CB (n = 11) and Massif Central, France referred to as MC (n = 9)	14, 15	304	Animal facility, Max Planck Institute for Evolutionary Biology, Ploen, Germany
C57BL/6J	C57BL/6J mice (n = 13)	5, 8	68	Animal facility, Max Planck Institute for Evolutionary Biology, Ploen, Germany