Agrarian
Bulletin
of the Urals

Russian Journal of Agricultural Research

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for Affairs of the Press, Television and Radio Broadcasting and Mass Communication Media.
Registration certificate: PI number 77-12831 on May 31, 2002
Subscription index in catalog «Russian Press» - 16356
ISSN 1997 - 4868 (Print)

The Journal is included in the list of the leading peer-reviewed scientific journals and publications, which should be published by the main results of theses for the degree of doctor and Ph.D.
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Journal is included in the list of VAK (from 25.09.2017), No. 291

ISSN 2307-0005 (Online)
Key title: Agrarnyj vestnik Urala (Online)
Abbreviated key title: Agrar. vestn. Urala (Online)

Аграрный вестник Урала № 12 (179) 2018

Биология и биотехнологии

Горелик О. В. доктор сельскохозяйственных наук, профессор Уральская государственная академия ветеринарной медицины

Федосеева Н. А. кандидат сельскохозяйственных наук, доцент Российский государственный аграрный заочный университет

Санова З. С. кандидат сельскохозяйственных наук Калужский НИИ Сельского Хозяйства

Новикова Н. Н. доктор биологических наук, профессор Российский государственный аграрный заочный университет

Тинаева Е. А. доктор биологических наук, профессор Московская государственная академия ветеринарной медицины и биотехнологии им. К. И. Скрябина

УДК:636.082.2

ANALYSIS OF BREEDING GENETIC CHARACTERISTICS IN COWS OF DIFFERENT AGE

One of the most importantfactors determining the increase in milk production and improving theefficiency of dairy cattle breeding in the country is the acceleration of thepace of improvement of herds. A special place in solving this important problemis given to the Holstein breed. The article presentsthe analysis of the inheritance of the basic features that characterize milkproduction, namely the milk yield for 305 days of lactation, variability andheritability of the main selection characteristics, the dependence of the milkyield of the daughters of heifers on the productivity of mothers, correlativeconnection between characteristics of breeding. The material of the researchwas highly productive Holstein cows in the leading breeding reproducer of theKaluga region. As a result of the research, the authors noted that the highgenetic potential of animals in the herd there is no consolidation of animalsin terms of milk yield. The following results of realization of productivitypotential of these cows were established: 93 heads (or 83,0 %) in the secondlactation increased milk yield in comparison with the first lactation by 400 kgand more of milk; 32 heads (or 42,7 %) in the third lactation reduced milkyield in comparison with the 2nd lactation; only 1 cow, or 1.3 %consistently reduced its yield from lactation to lactation. Thus, from 40 %to 53 % of cows with the 3rd last finished lactation not only did notrealize their potential in the subsequent lactation, but did not even reach theprevious lactation. Animals are not provided with optimal conditions for therealization of the genetic potential of productivity. The main reasons are thelack of selection or culling of animals in terms of milk yield, unbalancedfeeding and poor conditions of animal welfare. 


Keywords:

breed, milk production, last complete lactation.


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