Cattle resistance of the Krasnoyarsk region to hereditary-environmental diseases under industrial technology

The aim of this work is to study the hereditary heterogeneity of some hereditary environmental diseases in herds of red-and-white cows. The task is to study the hereditary determination of resistance to hereditary environmental diseases. The object of the study is the daughters of bulls-producers of JSC Krasnoyarskagroplem of Reflection Sovering 198998 line. The studies were carried out in the breeding reproducer of CJSC Svetlolobovskoe of the Novoselovsky District and the breeding farm of the experimental production farm Kuraginskoe (branch of the Federal Research Center of the KSC SB RAS). The reasons for the retirement of 9212 cows in the period 1991-2020 were analyzed. In EPF Kuraginskoe and CJSC Svetlolobovskoe 58 % of cows were culled from herds due to illness with three types of diseases: gynecological - 30 %, breast - 18 and limbs - 9.2 %. The share of culling of daughters in the EPF Kuraginskoye for abortion, limb diseases and gynecological reasons is higher than in CJSC Svetlolobovskoye, by 1.17 % (Р>0.999), 14.8 % (Р>0.999), 7.5 % (Р>0.999) respectively. In CJSC Svetlolobovskoe, animals were more often rejected for reasons of breast diseases by 9.2 % (P>0.999), respiratory tract diseases by 1.4 % (P>0.999) and other reasons by 12.2 % (P>0.999). Regardless of the impact of environmental factors, the share of culling of the daughters of Bredok and Design bulls for gynecological diseases in the EPF Kuraginskoye and CJSC Svetlolobovskoye was high and ranged from 28.6 to 29.4 % and from 27.6 to 27.7 %, respectively. The daughters of bulls Quartz were more often rejected for reasons of limb diseases (from 19.3 to 27.3 %) and gynecological (from 17 to 43.7 %), Modista - mammary gland (from 16.5 to 25.8 %) and gynecological ( from 26.6 to 38.4 %), Duet - breast (from 18.3 to 18.5 %) and gynecological (from 30.8 to 31.5 %). Descendants of Design and Kedr bulls are less resistant to diseases of the limbs, mammary gland, and gynecological.