A MICROSATELLITE LINKAGE MAP OF THE PORCINE GENOME

We report the most extensive genetic linkage map for a livestock speci es produced to date. We have linked 376 microsatellite (MS) loci with seven restriction fragment length polymorphic loci in a backcross refe rence population. The 383 markers were placed into 24 linkage groups w hich span 1997 cM. Seven additional MS did not fall into a linkage gro up. Linkage groups are assigned to 13 autosomes and the X chromosome ( haploid n = 19). This map provides the basis for genetic analysis of q uantitative inheritance of phenotypic and physiologic traits in swine.