CZU: 636.22/.28.082.234.1.

https://doi.org/10.61562/mgfa2023.07

VARIABILITATEA ȘI INTERRELAȚIA CARACTERELOR PRODUCTIVE LA RASA HOLSTEIN DE ORIGINE GENETICĂ DIFERITĂ
Constandoglo A.G. e-mail: aliek55@mail.ru
ORCID: https://orcid.org/0000-0002-1793-1368
Focșa V.F.
ORCID:https://orcid.org/0000-0002-3189-8672
Curuliuc V.Gh.
Institutul Ştiinţifico-Practic de Biotehnologii în Zootehnie şi
Medicină Veterinară, Republica Moldova
Abstract: The article presents the results of studying the variability and correlation of the main features of milk production at Holstein cows. The studies were carried out
in the herds of Joint-Stock Company "Aydyn" " (Dutch and German breed), of Society Limited Liability "Total Gnatyuk" (German and French breed), of Society Limited Liability "Doksancom" and Society Limited Liability "Heximsud" - Dutch breeding. The aim of the research was to study the variability and identify the correlations of the main economically useful traits of Holstein cows of different genetic origin. A positive correlation was found in terms of milk yield and fat content in milk of cows for the third lactation (+0.925, Dutch breed), moderate (+0.349, German breed) in the herd of the breeding farm Joint-Stock Company "Aydyn", which indicates the success of choice or
simultaneous selection between these traits. In the of Society Limited Liability SRL herd "Total Gnatyuk," the first-calves of French selection by yield for 305 days of lactation exceeded the first-calves of German selection by 784 kg of milk, the difference is highly reliable (P < 0.001).
Keywords: milk yield, fat content, correlation, variability, different origins.