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The Creole hair sheep (OPC) is an animal genetic resource of great importance for Colombia, there are no breeding programs in the OPC, so the absorbent crossings are the most common in order to increase prolificacy. The genes with greater effect on the prolificity in the OPC have not been studied, so the objective of this investigation was to characterize the genetic polymorphism in the FecXR locus of the BMP15 gene and the FecGH and FecGI loci of the GDF9 gene. For this, 150 sheep were genotyped by direct PCR for the FecXR locus and by PCR-RFLP for the FecGH and FecGI loci. The genotypic and allelic frequencies were estimated, the heterozygosity observed (Ho) and expected (He), the F values, the Hardy-Weinberg equilibrium (HWE) and a molecular variance analysis (AMOVA) were calculated. The FecXR and FecGH loci were monomorphic, only the genotype and allele wild were found in each one. The FecGI locus presented frequencies of 0,76 and 0,24 in the genotypes GG and GA, respectively. The AA genotype was not found. The allele frequencies were G = 0,89 and A = 0,11. The frequencies presented here agree with several reports on races around the world. The Ho was higher (0,266±0,15) than the He (0,189±0,12), with excess of heterozygotes within (FIS = -0,127, p>0,05) and between herds (FIT = -0,119, p>0,05). The variation between herds was low (1%) and the FST was 0,008 (p>0,05). The population was found in EHW. This is the first report of these polymorphisms in the OPC that could be used in selection schemes to improve prolificacy in this breed.

Polimorfismos FecXR, FecGI y FecGH en el ovino de pelo colombiano