Description of the linear features of the exterior of the first –calfs of different origin

Abstract

In our country, a linear assessment of the exterior of animals is becoming increasingly widespread, which allows us to objectively assess the influence of the producer bull on the change in the most important exterior features that ensure the se-verity of the dairy type while maintaining high productivity and intensity of use in the herd. This ensures the ranking of animals by body type and helps to accelerate the genetic progress of productivity. In this regard, the introduction of a linear assessment of the daughters of breeding bulls in the herd of a breeding plant is relevant. We conducted research aimed at studying and analyzing the signs of a linear description of the exterior of the first-calf cows of the daughters of Holstein bulls and identifying the most common exterior flaws in one of the breeding plants of the Kirov region. The analysis of the data showed that the evaluated first-calf cows of different origins are characterized by exterior features: average height, body of medium depth, strong physique, pronounced dairy type. The most common disadvantages of the exterior of the examined heifer cows are: interception of the shoulder blades (25.6%), asymmetry of the udder lobes (23.0%), weak headstock (15.4%).