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The aim of the study was to analyze sexual activities of gilts representing various genotype groups in the RBP4 and MC4R locus. Observations of gilt behaviour during the first and the second oestrus (before initiation of the reproduction phase) were carried out in the Pulawska breed from conservation breeding. The evaluation process comprised the duration of the heat as well as the intensity of heat...
Association of CAST and RYR1 genes polymorphism with carcass and meat quality in crossbreed pigs with a share of Pietrain breed. The aim of this study was to determine the effect of the calpastatin (CAST/TaqI) and ryanodine receptor (RYR1) genes polymorphism on carcass and meat quality traits in Pietrain crossbred pigs. The polymorphism in CAST and RYR1 genes was detected using the PCR-RFLP (Restriction...
A polymorphism within exon 2 of the 2, 4-dienoyl-CoA reductase gene (DECR1) was investigated by PCR-SSCP in 228 Shanxi White pigs. An association between the DECR1 polymorphism and growth traits in Shanxi White pigs was determined with an univariate animal model. The polymorphism was found within exon 2 of the DECR1, giving rise to genotypes AA, BB or AB. This polymorphism exhibited a significant...
The prolactin receptor gene (PRLR), located on chromosome 16 in pigs, is a candidate gene for reproductive traits. The experiment was aimed to detect the DNA mutations in this gene and to find probable relations between the genotype and some reproductive traits in boars. The polymorphism in the PRLR gene was identified by PCR-RFLP method using specific primers and the restriction enzyme AluI. In total...
Genes of retinol-binding protein 4 (RBP4), epidermal growth factor (EGF) and prostaglandin-endoperoxide synthase 2 (PTGS2) were examined as candidate genes for reproductive traits in sows. The material included a total of 300 sows of the Polish Landrace (n=86), Polish Large White (n=64)and commercial Line 990 (n=150). Included in the study was the total number of piglets born (TNB),number of piglets...
The objective of this study was to investigate the effect of two single nucleotide polymorphisms iIn growth hormone (GH) gene on performance traits in pigs. The animals (n= 320) belonged to four groups of commercial crosses being the progeny of crossbred Polish Landrace × Polish Large White sows and Polish Landrace, Polish Large White, Duroc or Pietrain boars. Genotypes of growth hormone gene (GH)...
The aim of this study was to characterize the polymorphism of genes RYR1, LEP, GH, MYOG, MYF5 and GDF8 in wild boar population inhabiting North-East of Poland. The above genes are considered candidate genes for carcass quality traits in domestic pigs. Ninety animals were tested. Genes RYR1, LEP and MYF5 appeared to be monomorphic, whereas genes MYOG, GH and GDF8 showed polymorphism similar to that...
The aim of the study was to characterize the polymorphism of calpastatin (CAST) gene identified with three restriction enzymes (HinfI, MspI, RsaI) in several pig breeds and lines bred in Poland and to evaluate the relation between the CAST genotypes and carcass traits. The analyses covered a total of 294 fatteners of Polish Landrace (PL), Pietrain (P), Zlotnicka Spotted (ZS), Torhyb [P × (Polish Large...
The aim of the study was to determine the effect of pituitary transcription factor 1 (POU1F1, Pit1) and the polymorphism of growth hormone releasing hormone (GHRH) genes on selected pig performance traits. The animals used were the progeny of Polish Landrace × Polish Large White crossbred sows and Polish Landrace, Polish Large White, Duroc or Pietrain boars. Eighteen perfor-mance traits were recorded...
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