Mapping the

Pbbcp1 locus in B6SJLF2 mice. A total of 98 B6SJLF2 mice (51 males, 47 females) were produced; measured for PB B220%, CD4%, and CD8% phenotypes at 2 to 3 months of age; tested for selected polymorphic markers adjacent to the Pbbcp1,Pbbcp2, and Pbctlp1 QTL regions; and proceeded for linkage analyses with the use of the Map Manager QTXb11 software. Only the Pbbcp1 locus was mapped to the same Chr 1 region with statistic significance (LOD 5.6,P < .000 01).