The genes encoding properdin (BF), glutathione peroxidase 5 (GPX5), fucosyltransferase 1 (FUT1), and estrogen receptor 2 (ESR2) were chosen as candidate genes for fecundity in pigs. Two sow populations were analyzed: 129 F1 sows (Deutsche Landrasse * Duroc) and 447 F2 sows (Large White * Landrace) * Leicoma. Significant associations between ESR2 gene variants and prolificacy were found in the F1 hybrid sow population. Sows carrying the B allele had on average 0.70 more NBA piglets than sows of the AA genotype. The analysis of F2 hybrid sows has identified significant differences in genotype distribution patterns between groups of extremely high and low litter size for the FUT1 gene. However, it must be stated that the observed associations may also represent effects of linked genes. The results clearly show that population-specific knowledge of gene effects may be very helpful for more efficient selection strategies.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 06.32, 2006
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