SELECTION OF BLACK-AND-WHITE MOTLEY BREED OF CATTLE USING DIFFERENT METHODS OF BREEDING SELECTION

The purpose of research is improving the efficiency of the breeding process with the planned inbreeding. Based on the works of Russian and foreign authors it is necessary to more closely approach the implementation of this method in practice. Many farms in the breeding of cattle meets application-related selection, often this phenomenon is spontaneous mean mass selection without studying the ancestry of individual animals or the proper documentation for the selection of the herd, and sometimes livestock-breeders deliberately form a related pair, despite the fact that in the literature there is still no clear conventional wisdom about the dangers of inbreeding or positive development. To properly assess the effectiveness of inbreeding it should be primarily studied the results of the use of inbred animals. The studies were conducted in a herd of Black-Motley breed cattle AIC «LUCH» Vavozhsky District of Udmurt Republic. The material for the study were pedigree card form 2-MOL, the data records, zootechnical and breeding records. Among outbreed animals were selected animals obtained by using the in-line selection and cross- line one. Inbreed individuals were classified depending on the degree and type of inbreeding. Cows resulting from the use of inbreeding, outbreeding outperform their half relative by yield of milk at 187.1 kg (3.5%). Between the calving, the longest period was detected in the group of cows resulting moderate inbreeding - 421.2 (R≥0.95) of the day, which is above the average for the group of outbreed and inbreed animals by 22.6 and 11.1 days, respectively.

inbreeding, outbreeding, selection, line, selection, genealogy, black and white, motley, bred