Agricultural Institute, Hybrid Centre of Poultry Breeding, BG- 6000 Stara Zagora, Bulgaria
OBLAKOVA, M., 2004. Genetic control and genetic diversity of esterases in poultry. Bulg. J. Agric. Sci., 10: 363-366
The genetic diversity of laying hens estherasis in a line of the Leghorn Breed, the hybrids: Hisex White and Hisex Brown, and Turkey, by polyacrilamide electrophoresis were studied. Genetic variation of the estherasis in blood serum of hens from the line Y-73 and Hisex White were controlled by a gene having two allele's states: Es1A and Es1B. The highest frequency had allele As1A. The erithrocit estherasis in hybrid Hisex Brown was determined by two codominant alleles, as the frequency of the allele Es-B was two times higher. The studies of liver tissue Es-3 from the hybrid Hisex White sowed a definitive diversity of genetic variation. Es-3, as well as Es-4 were controlled by locus having three allele states defying four phenotypes. The genotype Es-BB- 0.4281 demonstrated the highest frequency, and the lowest one- haeterozigotic genotype Es- AB. The erytrocit Es-8I in turkey was controlled by 5 alleles system of the estherasis locus, as the phenotype BB had the highest frequency, respectively the allele B. The two alleles system controlled the synthesis of erytrocit estherasis Es-8II.