[Participation of structural gene markers and anonymous DNA sequences in genetic differentiation in the species Ovis aries L. and Ovis nivicola borealis]. / Ychastie markerov strukturnykh genov i anonimnykh posledovatel'nosti DNK v geneticheskoi differentsiatsii u vidov Ovis aries L. i Ovis nivicola borealis]

Genetic variability and genetic differentiation in two Ovis species--domesticated (Askanian sheep, Sokilska and Kulunda sheep) and wild (bighorn sheep) were analyzed using different types of molecular-genetic markers--genetic-biochemical (30 loci) and DNA (ISSR-PCR) ones. High level of genetic variability was revealed. The average heterozygosity of biochemical markers loci was in range of 0.073-0.188. Markers involved into process of genofond divergence of two closely related species were revealed.

[The polymorphism of proteins, RAPD-PCR and ISSR-PCR markers in European and American bison and cattle]. / Polimorfizm belkov, RAPD-PCR i ISSR-PCR markerov u zubrov, bizonov i krupnogo rogatogo skota.

The comparative analysis of genetic differentiations between three species of Bovinae--Bos taurus, Bison bonasus, Bison bison with the use of different types of molecular-genetic markers--genetical-biochemical (35 loci) and DNA markers (RAPD-PCR, ISSR-PCR) was carried out. It was shown, that the evaluation of interspecies genetic interrelations was connected more with the determined molecular-genetic markers (loci), included in analysis, than with the marker's belonging to certain type (protein polymorphism, variability of DNA repeat distributions).

[The polymorphism of the kappa-casein gene and its connection to economically valuable traits in cattle]. / Polimorfizm gena kappa-kazeina, ego sviaz' s khoziaistvenno tsennymi priznakami u krupnogo rogatogo skota.

The literature data on milk protein (particularly kappa-casein) polymorphism study in different cattle breeds are represented. Allele variants of kappa-kasein are associated with lactation and have an influence on the composition of milk and its properties, including cheese-making properties. The importance of ways of kappa-casein genetic variants use in concrete selection programs are discussed.