GENETIC POTENTIAL OF BLACK MOTTLE CATTLE OF DIFFERENT LINES AND BRANCHES

An analysis of the genealogical structure of black-and-white cattle was carried out, taking into account new promising branches in the breeding reproducers of LLC “Plemennoy edelo Alekseevskoye” and LLC “Plemennoye delo”. It has been established that the genealogical structure of the broodstock of reproducers is represented by three lines of the Holstein breed, such as Vis Beck Idiala 1013415, Reflection Sovering 198998 and Montvik Chieftain 95679. There are eight promising branches from three lines in the herd, while the largest share of dairy cattle is assigned to the branches of HANOVERHILL STARBUCK 352790 - 21.9% (“Plemennoye delo Alekseevskoye”) and 40.3% (“Plemennoye delo”) from the Vis Bek Aidiala line. Reflection Sovering has four branches in the herd “Ploomnoedelo”, and three branches in the “Plemennoye delo Alekseevskoye”, with the largest shares of TO-MAR BLACKSTAR-ET 1929410 - 13% and 14.1% and ARLINDA ROTATE 1697572 - 5.8% and 10.9%. The Montwick Chieftain line is represented by one branch - CARLIN-M IVANHOE BELL with 12.5-13.3% of cows in the herd. A small group of cattle comes from the WALKWAY CHIEF MARK 1773417 branch (3.4%).A high pedigree index of the bull is characterized by animals of the SWEET-HAVEN TRADITION branch with a milk yield of 12205 kg, the TO-MAR BLACKSTAR-ET branch (13320 kg; 4.00%; 3.35%), the WALKWAY CHIEF MARK branch (13801 kg; 4.46%) and branch CARLIN-M IVANHOE BELL (13323 kg; 4.26%; 3.38%). Animals of the M. Chieftain line with the best genetic potential for milk yield are observed to have an insufficiently high degree of its implementation, only 43%. In general, all lines have a low realization of the genetic potential of milk yield (43-49%), which is primarily due to the large number of young cows in the herd and the low age at calving.