Influence of genotype and paratype factors on the realization of milk productivity of cows
DOI:
https://doi.org/10.31548/dopovidi6(106).2023.012Keywords:
cows, milk productivity, genotypic factors, line, sire, strength of influenceAbstract
The article examines the influence of genotypic and paratype factors on the milk productivity of cows of the ukrainian red-spotted dairy breed in the conditions of LLC "ATZT Myrne" of the Kitsman district of the Chernivtsi region.
As a result of own research, it was established that cows of different genealogical formations differ in milk productivity, which indicates their hereditary influence. Cows of the Cavalier Rf line had the highest indicators of milk productivity during the first lactation: hope – 6402.1 kg, milk fat – 233.9-247.7 kg, milk protein – 201.3-212.8 kg (P<0.05). They exceeded their peers in milk yield by 101.8-734.9 kg, milk fat by 5.0-36.6 kg, milk protein by 5.3-29.2 kg.
Cows of the Chief line had the highest hope for the third lactation – 6193.9 kg. They exceeded their peers in milk yield by 172.5-1436.9 kg, milk fat by 11.4-53.0 kg, milk protein by 7.9-46.9 kg (P<0.05; P<0.01; P<0.001).
It was established that the highest milk yield in 305 days of the first lactation was in the daughters of the bull G. Arti Et Red Tv Tl Ti (6889.1 kg). They exceeded their peers in terms of milk yield, milk fat and milk protein by – 497.0-1974.7, 18.7-78.3, 16.9-68.1 kg, respectively (P<0.01; P<0.001).
The results of our research prove that the milk productivity of cows depends on the line and origin of the father by 11.3-25.4%. The greatest influence on productive indicators of animals is the origin of the father, its power of influence on fertility is 25.4%, the content of fat and protein in milk is 16.5-24.3%.
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