ASSIGNMENT OF 19 PORCINE TYPE-I LOCI BY SOMATIC-CELL HYBRID ANALYSIS DETECTS NEW REGIONS OF CONSERVED SYNTENY BETWEEN HUMAN AND PIG

Nineteen so-called type I-loci, including ACO2, ADRA2, CAST, CCK, CHAT , IGKC, IGLV, IL4 IL6, INHA, LIF, MX1, PTH, RBP2, TCRA, TCRB, TGFB2, T GFB3, and UOX have been mapped in the pig with an informative somatic cell hybrid panel. By analyzing these new assignments in the knowledge of heterologous chromosome painting (Zoo-FISH) data for the porcine g enome, it is possible to predict subchromosomal locations for most of these loci. Previously defined regions of conserved synteny were confi rmed, and the extent of six of these regions was refined. These improv ements in the porcine gene map facilitate the transfer of gene mapping data from ''map-rich'' species such as humans and mice.