INTEGRATION OF THE PIGMAP AND USDA MAPS FOR PORCINE CHROMOSOME-14

In order to align two previously published genetic linkage maps, a set of four of the United States Department of Agriculture (USDA) microsa tellite linkage markers was mapped in the International Pig Gene Mappi ng Project (PiGMaP) reference families. Two-point linkage analysis was used between these USDA markers and the set of genes and markers prev iously mapped on the PiGMaP chromosome 14 map. Markers with threshold lod scores of three or greater were used for multipoint map constructi on. The USDA and PigGMaP linkage maps of chromosome 14 were aligned us ing the four USDA microsatellite markers along with three markers that are common to both maps. The PiGMaP genetic linkage map order for chr omosome 14 was confirmed and the map was expanded to 193 cM with addit ion of the new markers.