Relationship of FABP2 (-561a> C) gene polymorphism with abdominal fat content in сhicken's of meat poultry production

Poultry farming is one of the most dynamic, highly developed and knowledge-intensive branches of domestic livestock production. In recent years, in the meat balance the poultry meat level has reached more than 33% in the world and 40% in Russia, especially by means of growing chicken broilers. At the same time, it has become evident that the lipid nutritional value of poultry meat needs correction in order to increase its biological value. About 15-20% of the modern broiler carcass is fat. This occurs due to meat poultry selection in the context of the growth rate, without taking into account its propensity to fat deposition. Fatness is inherited in birds fairly well. The heritability estimate (h2) varies from 0.5 to 0.8. There is an urgent need to find molecular markers for breeding broiler lines to reduce the abdominal fat content. It is to increase the nutritional value of the carcass and reduce the cost of feeding. The purpose of this study is to analyze the frequency genotype distribution of mononucleotide polymorphism of FABP2 (-561A> C) gene in groups of chikens with different abdominal fat content. FABP2 has a high affinity for saturated fats and provides capture, intracellular transport and metabolism of long chain fatty acids, acting mainly in the intestine. In chicken, this gene is located on the 4th chromosome. According to the results of FABP2 (-561A> C) gene test, the incidence of CC, AC and AA genotypes is the following: (0.42), (0.35) and (0.23), respectively. As for the fat content, Iza Hubbard F-15 cross broilers with heterozygous AS genotype slightly outperform the ones with homozygous genotypes, but these differences are not statistically significant. Perhaps, to obtain a more meaningful result, it is required to increase the sampling, add another gene associated with fat accumulation and study the additive mechanism of the gene work.