Characteristics of a karyotype of cattle of grey Ukrainian breed

Abstract

The purpose. Cytogenetic analysis of grey Ukrainian cattle and comparison of stability of its karyotype with retrospective data concerning animal breeds of different directions of productivity. Methods. Cytogenetic — analysis of metaphase plates of cells of peripheral blood of cattle; microkernel test, statistical. Results. The share of cells with aneuploidy at animals of grey Ukrainian breed made 1,2%; average arithmetical amount of aneuploidic cells at animals of breeds of milk direction of productivity — 2,4%, that twice exceeded this index at grey Ukrainian cattle. At animals of breeds of the combined direction aneuploidy made 2%, at animals of breeds of meat direction of productivity — 10,6% with statistically reliable variance (P>0,99). Variability on indexes of somatic polyploidy is not detected in cows of grey Ukrainian breed, share of 2-nuclear lymphocytes — 2,2‰, that twice below, and mitotic activity of peripheral blood lymphocytes — 2,8‰, that is authentically below (P>0,99) in comparison with the animals specified above. Conclusions. The karyotype of probed cows of grey Ukrainian breed was characterized by the heightened stability in comparison with animals of breeds of milk, combined and meat directions of productivity at spontaneous mutagenesis.