We have used a PCR-based approach for the genetical and physical mapping of 34 transcripts isolated from a porcine small intestine cDNA library. All but one gene were regionally localized by using a somatic pig-rodent cell hybrid panel, and 12 genes were mapped by linkage analysis of single-stranded conformational polymorphisms developed in 3' untranslated regions of transcripts. For 20 of the transcripts, the human homolog has already been mapped. This study thus represents a significant contribution to the pig comparative map. Some important findings were that we could clarify the extent of a previously identified inversion event in a region of conserved synteny between SSC6q and HSA1p, that SSC14q does contain a region homologous to HSA1, a situation not clear from earlier ZOO-FISH studies, and that the homology between SSC17 and HSA20 includes the p-arm of HSA20.
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