Genetic and environmental factors on minimization of inbreeding depression in a herd of simmental cattle

The article presents the results of the evaluation of the intensity of growth Simmental calves using different degrees of inbreeding, including in-and-inbreeding, bottom crossing, top-cross inbreeding, in-breed-line-crossing. Determined that at bottom crossing, top-cross inbreeding, in-breed-line-crossing the influence of genetic factors on live weight from birth to 6 months in bulls increases to 73,7-75,8%.