Sire influence on reasons of daughter culling from the herd

The article presents the results of bull’s evaluation on susceptibility of cows to culling reasons, including udder, legs and internal organs diseases, surgical diseases, tuberculosis and etc. It has been found out that bulls are able to have a significant impact on the reasons for culling heifers from the herd. More than that, heifers are able to inherit through their fathers their maternal ancestors’ resistance to gynecological diseases. The majority of sires (Buyan 114, Rom 1675, Dobryak 1745 and Dar 2383) has 20,6-27,6 % of culled heifers with gynecological diseases in the livestock structure, although gillyf-lower sires have only 8.3% of heifers 1206 culled for the same reason. Buyan bulls have ap-proximately 7,5% of heifers culled for old age, sire Dar 2383 have 3,7 and 4,9% of heifers accordingly culled for leucosis and tuberculosis. The above mentioned bulls have 2,4-3,7% of heifers with internal organs diseases.