The influence of the factor "genetic value of the sire" on the implementation of the genetic potential of the indicator "milk production of maximum lactation" of the Yaroslavl breed cows

Kosyachenko, N.M.; Коновалов, А.В.; Nikolaeva, E.A.; Malyukova, M.A.; Petrovic, M.P.; Pantelic, V.

doi:10.2298/bah1501145k

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“…The nutritional and environmental factors affect the degree to which genetic potential for milk production are expressed by cattle breeders (Miciński et al, 2008). At the same time, some scientists believe that intensive milking of heifers lead in declining of the span of their productive use and may result in reducing the terms of their economical use due to heavy loads on the developing organism (Kosyachenko et al, 2015a;Kosyachenko et al, 2015b). The result is a strain of the organism, metabolic disorders, reduction of natural resistance of animals, especially conditions of poor feeding, housing and health protection.…”

Section: Introductionmentioning

confidence: 99%

Relationshipis Between Blood Hormones and Metabolites in Simmental Dairy Cows During Transition Period and Mid Lactation

Đoković¹,

Ilić²,

Kurčubić³

et al. 2016

mjas

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The Yaroslavl region is a highly developed agricultural region of the Russian Federation. The level of milk production and the duration of the economic use of animals are the basics of success of leading dairy cattle breeding. These are indicators of biological and economical. Create of highly productive herds and increasing the span of the economic use of animals and lifetime productivity are the necessary goals of the intensification of dairy farming of the region. Therefore, the aim of our research was to determine the influence of milk yield during the first lactation on the controlled productivity signs and duration of the economic use of Yaroslavl breed of cows and its hybrids with Holstein. For statistical data have used the procedure generalized linear models (GLM) while in determining the strength of the influencing factor MATLAB 2000. Likewise, the assessment of phenotypic variability was performed using the multivariate analysis of variance. Our study has revealed that occur dependence between controlled signs and the factor milk yield during the first lactation.

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Section: Introductionmentioning

confidence: 99%