Selection-genetic parameters of Landrace pigs at breeding enterprises of the Republic of Belarus

DNA testing of Landrace pigs was carried out for the genes RYR1, ESR, PRLR, MUC4, ECR F18/FUT1, H-FABP (allele systems H and D) and 15 DNA microsatellites. The frequency of occurrence of the preferred genotype for the RYR1NN gene was 100 %. The desired genotypes PRLRАА, H-FABPHH and H-FABPdd were identified in pigs with a frequency of 10.0–73.3 %, 33.3–84.0 % and 33.3–40.0 %, respectively. No animals were identified as being resistant to colibacillosis (ECRАА genotype). The majority of Landrace pigs at breeding farms were resistant to E. coli F4 and had the preferred genotype MUC4CC – 70.9 %. When analyzing population genetic parameters using microsatellite DNA data, 110 alleles were identified in animals. The number of alleles for the loci ranged from 3 to 10. The highest level of allelic diversity was identified in animals bred at SE “ZhodinoAgroPlemElita” – 5.40 alleles per locus. The accuracy of assignment of the studied animals to “their” respective population exceeds 98 %. A high degree of genetic similarity was identified among the Landrace breed animals of the studied populations. The coefficients of genetic similarity ranged from 0.795 to 0.874.