The study of effect of genotypes for DNA marker on reproductive qualities of sows of large white and Landrace breeds

The genetic progress by low-inherited reproduction traits in pigs can be increased by integrating into breeding programs the DNA markers, which are associated with quantitative trait loci (QTL) of reproductive qualities (marker selection, MAS). The aim of the present study was to assess the effect of DNA markers IGF2 (insulin-like growth factor 2), ECR F18 / FUT1 ( Escherichia coli F18 receptor), ESR (estrogen receptor) and MUC4 (mucin 4) on the fertility traits of Large White and Landrace sows. The studied traits included the total number of piglets born per litter (TNB); number of piglets born alive per litter (NBA); average birth weight (BW) and adjusted birth weight (BWadj); weight at weaning at 21 days (WW) and adjusted weight at weaning at 21 days (WWadj). The genotypes frequencies of the analyzed markers were determined. Besides we identified significant deviations of the genotype frequencies from the population equilibrium for Large White breed by the IGF2 gene (p