Selection of Healthy and Highly Productive Dairy Cattle

Ashraf Mohamed Ward, M. Omry Abuargob, A. Abdelatef Aswehli, A. Rabia Al Zlitne, S. Y Ruban, M. Tarek Elgusbi, M. Ismail Hdud


Dairy cow breeding has become highly complex as progress is made into the understanding of which genes are responsible for which traits and how well a particular trait is passed from one generation to the next. The impact of industrial use of cows on following genetic parameters: phenotypic variability, correlation, repeatability and heritability of economically useful traits in the high producing dairy cows herd of black-motley breed with the high level of Holsteins has been studied. After setting the breeding objectives it is important to decide which traits can be used to select individuals for breeding, and these traits being known as selection criteria. With the increasing the period of use cows up to 7 or more lactations, coefficients of variation of all monitored indicators declined in connection with the removal of cows with extreme indicators of productivity and longevity during first 3-4 lactations. The correlation coefficients of milk yields during the first, highest lactation and in lifetime, regardless of the period of use is closely related to the life-long milk yield, milk yield per day of productive life and milk yield per day of life. The heritability coefficients (h²) of the indicators of longevity with increasing period of use cows up to 5 or more lactations has tended to increase: by the age of first calving from 0.01 to 0.16, by the number of highest lactation from 0.18 to 0.33, by milking days from 0.10 to 0.30, by lifetime milk yields from 0.18 to 0.32, and by days of life from 0.01 up to 0.21. The highest repeatability of indicators of milk yield, milk fat, body weight of cows regardless of the duration of their use was for the adjacent lactations (1 and 2, 2 and 3, 3 and 4, 4 and 5, 5 and 6). With increasing distance of lactations from each other the coefficient of repeatability of these traits is lowered.


Cow; Productivity; Longevity; Variability; Correlation; Repeatability; Heritability.

Full Text:



Basovskii, N.Z(1983). Population genetics in breeding dairy cattle / N.Z. Basovskii. - Moscow: Kolos,. - pp 6-44.

Devyatkina, G.S. Characteristic of selection and genetic parameters of economically valuable traits of cows / G.S. Devyatkina, N.V. Molchanova, N.N. Sulima (2007). // PFUR Bulletin, - № 1 - 2. A series of agronomy and animal husbandry. - pp. 64 - 68.

Seltsov, V.I. (2006) The technique of creating high-dairy cattle herds (breeding aspects) / V.I. Seltsov, N.I. Strekozov, G.N. Krylova et al. / State Scientific Institution ARSRIF. - Dubrovitsy: ARSRIF, – 32 p.

Ovchinnikova, L.Y. (2007) Genetic and population processes at Holstein breeding of black- motley cattle in Ural / L.Y. Ovchinnikova. - FSBEI HPE Ural SAVM: Troitsk,. - 210 p.

Seltsov, V.I. (2014) Guidelines for selection and breeding work in dairy herds / V.I. Seltsov [et al.]. - 4th ed. - Dubrovitsy: All-Russia Research Institute for Animal Husbandry (VIZh),. – 96 p.

Seltsov, V.I. (2006) The influence of the ancestors on the productive potential of the offspring /V.I. Seltsov // Materials of international scientific-practical conference: scientific works of VIZh. - Dubrovitsy: VIZh,. - issue 64. - pp. 129 - 133.

Yakovleva, O.A. (2000) Repeatability of the traits of milk production / O.A. Yakovleva // Breeding, feeding, maintenance of livestock and livestock products (Issue 10). - FSBSE ARRIB. - Lesnye Polyany,. – pp. 14 - 17.

Grachev V. S, Abdullaev A. O (2013). Age dynamics of indicators of dairy productivity of cows. Vestnik student's scientific society / . - St. Petersburg, - P. 246 ... 249.

Grachev V.S, Zhebrovsky L.S (2011) Genetic contribution of cows-recorders in improving the herd on dairy productivity of the agroindustrial complex: problems, condition, development prospects // Collection of articles of the First All-Russian Scientific and Practical Conference. - St. Petersburg, - P. 39 ... 42.

Grachev V.S. Biometric (2012) processing of zootechnical data by means of EXCEL using the analysis package (methodical instructions) SPb,. - 48 p.

Teimurian M., Aslmeninejad A.A. and Tahmuraspor M. (2011). Estimation of genetic parameters for production traits of Holstein cattle. Iranian J. Anim. Sci. 3, 179-184.

Visscher P.M. and Thompson R. (1992). Univariate and multivariate parameter estimates for milk production traits using an animal model. I. Description and result of reml analyses. Genet. Select. Evol. 24, 415-430.

Zishiri O.T., Cloete S.W.P., Olivier J.J. and dzama K. (2013). Genetic parameter for live weight traits in South Africa terminal sire sheep breeds. Small Rumin. Rese. 116, 118-125.


  • There are currently no refbacks.

Copyright (c) 2018 ASHRAF MOHAMED WARD

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.