The data on 16 polymorphic systems (22 loci) of blood biochemical mark
ers were studied in different breeding lines of European bison: Lowlan
d, Lowland-Caucasian, and Mountain lines. Polymorphism was revealed in
three loci: Pgm, Idh, and Tf. The average heterozygosity was 3.95%. S
tatistically significant deviation from the Hardy-Weinberg equilibrium
towards an excess of heterozygotes was revealed in the Pgm-2 locus. T
his suggests certain processes that prevent the decrease of population
genetical diversity. The estimations obtained of the genetic distance
s between European bison lines demonstrated the close relationship amo
ng them.