Relative genomic intervals of subcongenic strains developed from B6 .Cg- Pbwg1 . The black bar indicates the minimum genomic region derived from the Mus musculus castaneus mouse, whereas the gray bar indicates a region from the C57BL/6J (B6) mouse. Distal and proximal boarders of each subcongenic strain are arbitrarily drawn by vertical lines. The physical map position (Mb) of microsatellite markers is shown on the horizontal line (Table 1). The triangle indicates the position of the peak LOD score for previously identified QTLs affecting fat pad weights and lean body weight .