Abstract
Genomic selection and a targeted chicken breeding program affect the meat productivity of poultry. Evaluation of the genotype allows you to identify the preferred alleles of the genes that are responsible for certain quantitative traits. The LCORL (ligand-dependent nuclear corepressor) gene is one of the key genes that determine body height and weight. Genotyping was performed by one substitution (503 A/G) in the LCORL gene in the cocks of the Tsarskoe Selo population of 2023, which formed the breeding core of breeding. The frequency of occurrence of alleles for the A503G substitution of the LCORL gene was revealed (AA – 0.23; AG – 0.50; GG – 0.27). It was also found that individuals with the GG genotype are superior to the rest in terms of live weight (the body weight of roosters with the GG genotype at 89 days was 2260.06 ± 35.06 g, and that of the homozygous for the A allele was 2156.93 ± 29.92). Thus, the results of the study make it possible to associate the A503G polymorphic variant in the LCORL gene as a marker for live weight indicators of roosters and to use it in the selection of parental pairs in the selection of the Tsarskoye Selo breed in order to improve meat productivity indicators.
Published Version
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