Genetic variability of hen breeds from breeding source as evaluated by genetic polymorphism of blood proteins
2002
Trakovicka, A. | Bezova, K. | Benkova, J. | Haladova, D. | (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovak Republic))
On the basis of genetic polymorphism of blood proteins we studied the genetic variability of four hen breeds from the breeding source: Oravka (OR), Rhode Island Red (RIR), New Hampshire (NH) and Sussex (SX). The polymorph system of haemoglobin was realized as a two-allele one, we found no differences between breeds, in all of them were heterozygous genotypes only. The breeds RIR and OR showed the highest genetic variability in the three-allele system of albumins. Heterozygous genotypes AB (70.8%) prevailed in RIR breed, and AB (59%) and AC (33%) in OR breed. We found the highest level of polymorphism for the locus transferin with the highest values for RIR and OR breeds (ENA = 3.60 - 3.64). In the Oravka breed absented out of 10 possible genotypes the genotype CC only. The Sussex breed confirmed low genetic variability in polymorphous systems of albumins and transferins. It differed markedly from other tested breeds in frequency of alleles as well as in frequency of genotypes. Total highest genetic variability in the studied polymorphous systems was in OR and RIR breeds. It was confirmed also by the results of genetic distances, mainly the high value of genetic coincidence (0.9136), which proves high genetic similarity of the studied breeds
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