[The major OLA histocompatibility complex in sheep. Study of 6 new factors and definition of a 3rd locus of the complex: OLA-C].

6 new OLA factors of the Sheep histocompatibility complex are described. 3 of them, C 14, C 15, C 17 are the products of 3 alleles at a third locus of the complex: OLA-C, closely linked to OLA-A and B. Two factors A 13 and B 12 are the products of 2 alleles at OLA-A and B loci. The last factor (16) is the product of an OLA gene, the locus of which is not yet defined. 28 haplotypes are described. Genes at the 3 OLA loci are in linkage disequilibrium.