ЭФФЕКТИВНОСТЬ МЕТОДА BLUP Animal Model В ОЦЕНКЕ ПЛЕМЕННОЙ ЦЕННОСТИ МАТОЧНОГО ПОГОЛОВЬЯ ЧЕРНО-ПЕСТРОГО ГОЛШТИНСКОГО СКОТА: КАЗАХСТАНСКИЙ ОПЫТ
Year: 2026
Type: article
Abstract: The aim of the study was to evaluate the breeding value of the Holstein-Friesian black-and white cattle herd in the Kazakhstani population using the BLUP Animal Model. The study population consisted of first-calf Holstein-Friesian black-and-white cows in the Kazakhstani population (n = 2,774 head). The breeding value of cows based on milk production traits for one lactation was estimated using the Best Linear Unbiased Predictor (BLUP) Animal Model. The conformation traits of the study population were assessed through visual inspection based on a series of morphological characteristics. The analyzed parameters included: body type and conformation, height at the withers, body depth, angle and slope of the withers, width of the withers, limb conformation when viewed from the side and rear, hoof angle, prominence of the hock joint, as well as udder characteristics—attachment of the front and rear quarters, height of the rear attachment, prominence of the central furrow, udder depth, location and length of the front and rear teats, and width of the rear udder quarters. The studies were conducted on cows in the period from 30 to 150 days of lactation. An evaluation of the conformation traits of 2,774 first-lactation Holstein cows from 11 base farms allowed for a comprehensive characterization of the animals’ morphofunctional characteristics across three main complexes: general appearance, udder, and limbs. Visual inspection, taking into account age, physiological, and productive indicators, provided. The constructed linear profiles of the exterior showed the influence of production and technological factors on the formation of morphological features, confirmed the close relationship of the exterior with dairy productivity and allowed us to identify stable breeding characteristics. The most pronounced deviations from the optimal values are noted in the udder depth, the position of the front nipples and the angle of the hooves, which indicates directions for further improvement of breeding.
Source: Animal Husbandry and Aquaculture
Language: English
Subfield: Genetics
Domain: Life Sciences
SDG: Zero hunger
Open Access status: hybrid
OpenAlex ID: W7147676147