Dynamics of correlation coefficients of economic and productive characteristics depending on the age of cows

Горелик, А. С.; Bitkeeva, M.A.; Demina, N.A.; Mullagulova, Gulnara

doi:10.1051/e3sconf/202125408023

Cited by 8 publications

(10 citation statements)

References 10 publications

(7 reference statements)

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“…Along with the positive traits of Holstein cattle, which are expressed in high milk yield and enhanced suitability for machine milking, some certain problems have been revealed also. One of these problems is a reduction of cows productive longevity [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Influence of kappa-casein genotype on milk yield of cows and on culling of cows

et al. 2022

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For production of milk the breeds of highly productive dairy cows of domestic and foreign selection are used. These breeds include the Black-and-white mottled breed, which makes up more than 51% of the total cattle herd in Russian Federation, and the Holstein breed, which share is more than 15% and is constantly increasing. It has been established that cows with different kappa-casein genotypes differ in usability of their milk for cheese production. The research of influence of kappa-casein genotype on milk yield capabilities of cows and the reasons for culling of cows is relevant and of interest nowadays. The biggest share of the herd consists of cows with AA genotype, and the least share, 3.8%, consists of the most favorable BB genotype cows. These cows feature higher milk yield. Though there was no significant difference between the milk yield of cows with genotype BB and genotypes AA and AB, but a tendency for BB genotype superiority was clearly observed. The higher milk yield determines a higher yield of nutrients with milk. The group with the AB kappa-casein genotype accounted for a greater share of culled cows in the first lactation period. The lower rejection rate was recorded in the group of BB genotype cows.

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Section: Introductionmentioning

confidence: 99%

Influence of kappa-casein genotype on milk yield of cows and on culling of cows

et al. 2022

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“…For its production, highly productive dairy cattle are used; the main livestock is represented by related breeds of Dutch origin -Holstein, black-and-white mottled, etc. [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of reproductive qualities of cows depending on the productive longevity

et al. 2022

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The Ural type of the domestic black-and-white mottled breed features high productivity rates, good suitability for industrial milking technology, but the duration of its productive longevity is 2.4–2.6 lactations only, although in herds there are cows with productive longevity up to 10 lactations. The decline in productive longevity is associated in particular with reproductive qualities. As a result of the research, it was found that the Sealing Trijun Rockit cows proved to be the most resistant to their long use within the conditions of dairy farms for industrial milk production of pedigree reproducers; their productive longevity was 4.0 lactation. In other lines the productive longevity ranged from 1.8 (Pabst Governor line) to 2.5 (Montvic Chieftain line) lactations. A low fertility rate (less than 0.95) proves the existence of reproduction problems in the herd. Modern Holsteinized black-and-white mottled cattle bred in the Sverdlovsk region has high breeding qualities. The potential of their use is quite high and, despite certain reproduction problems, they are able to produce for a long time in the ecological and forage conditions of their breeding zone.

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“…In the Sverdlovsk region, the Ural type of Holstein black pied cattle has been created and officially registered, the breeding of which is done mainly along Holstein lines. The thorough-bredness share of the breeding stock in individual farms of the country has increased to 91% or more for the Holstein breed [5][6][7][8][9][10]. The study of interrelation between the productive traits of modern domestic dairy cattle of the black pied breed remains relevant and has practical significance.…”

Section: Introductionmentioning

confidence: 99%

Changes’ assessment in the interrelation of productive traits of holsteinized black pied cattle

Горелик

Lopaeva²,

Неверова³

et al. 2022

BIO Web Conf.

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Holstein black pied cattle with a high genetic potential of productivity are bred in the Sverdlovsk region. The study of the interrelation between the productive traits of modern domestic dairy black pied cattle of the Middle Urals zone with high thorough-bredness for the Holstein breed is relevant. The purpose of the work was to study the conjugation dynamics of productive traits by lactation depending on the line. According to the average milk yield indicators. There were no differences in MFF and MFP in milk from cows of different lines, yet the fluctuations in milk yield within the lines were significant. The highest indicators of the correlation coefficient are established between the qualitative indicators of milk, which means that an increase in one of the indicators invariably leads to an increase another. A positive low conjugacy was established between milk yield and MFP in milk, as well as milk yield and cows’ live weight for the first and second lactation in cows of both lines. In cows of the Vis Back Ideal 1013415 line, the conjugacy of productive traits for the third lactation turned into negative, except for milk yield and live weight. Thus, the linear affiliation of cows and their age (lactation) influence the interrelation of productive traits, which can be considered when further planning breeding work with the herd.

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Dynamics of correlation coefficients of economic and productive characteristics depending on the age of cows

Cited by 8 publications

References 10 publications

Influence of kappa-casein genotype on milk yield of cows and on culling of cows

Influence of kappa-casein genotype on milk yield of cows and on culling of cows

Dynamics of reproductive qualities of cows depending on the productive longevity

Changes’ assessment in the interrelation of productive traits of holsteinized black pied cattle

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