[Shift in the allele frequencies of the Ld locus in mink stock infected with Aleutian disease].

An idea on organization of the Ld-system of low density lipoprotein in the domestic mink as on a "closed" immunogenetic system with two codominant alleles Ld1 and Ld2 was confirmed. Significant differences in frequencies of genes and genotypes of the Ld-system between state farm "populations" unaffected with Aleutian disease and those which were centres of this epizootic were established. The results obtained confirm the assumption made earlier on subvitality of the Ld2 gene.