Institute of Animal Breeding, BG-2232 Kostinbrod, Bulgaria
TENEVA, A., 2001. Research on the dynamics of the alleles from amylase locus in the cattle populations, reared in Bulgaria. Bulg. J. Agric. Sci., 7: 499-504
The study was conducted on 2846 individuals (bulls, cows and their offspring) that were descended from the Black and White, Bulgarian Brown, Jersey and Bulgarian Rhodope cattle breeds.
The results showed that distribution of genotypes of the locus of the enzyme amylase 1 in the cattle of Black and White breed is close to the 1:2:1 proportion while in the other breeds were encountered the genotypes AMY 1B/AMY 1B and AMY 1B/AMY 1C with higher frequency. This is due to a statistic reliable differences in the allele frequencies between some of the researched breeds. The differences in the allele frequencies between male and female parts of the studied populations are attended by the disturbed genetic equilibrium in the next generations. When mating type AMY 1B/AMY 1C x AMY 1B/AMY 1C and AMY 1B/AMY 1C x AMY 1C/AMY 1C statisticaly reliable less descendants of genotypes similar to their mothers were detected in comparison with expected.