Genetic compatibility of lines of Simmental and red-and-white Holstein breeds

Abstract

The article is devoted to the assessment and analysis of selection and genetic indicators of milk productivity of Simmental cows belonging to different genealogical lines. As a result of the research, it was established that representatives of the Holstein lines of cattle R. Sovering ? V.B. Aydial surpass the peers bred from the selection of bulls of the Faasadnik line to the broodstock of the M. Chieftain line: in milk yield - by 1308.2 kg, fat content in milk - by 0.17%, milk fat yield - by 62.6 kg. It was found out that with the intraline selection of R. Sovering ? R. Sovering, the level of milk yield of cows was 6372.8 kg, and with the cross of R. Sovering ? V.B. Aydial - 6297.0 kg, the difference in the amount of milk produced is 75.6 kg, i.e. the milk production of cows depends significantly on the selection options. The presented analysis gives a brief description of the population of the Simmental breed by genealogical lines and crosses in the Saratov region.