The genetic parameters for milk, fat and protein yields in Holstein cows

Rodica Stefania Pelmus, Horia Grosu, Mircea Cătălin Rotar, Mihail Alexandru Gras, Cristina Lazăr, Florin Popa

Abstract


The aim of this study was to analyse methodology of genetic parameters estimation and breeding value prediction for milk, fat and protein yield in the first lactation of Holstein cattle using Best Linear Unbiased Prediction procedure- Restricted Maximum Likelihood method with individual animal model. The cows with records in first lactation were from experimental farm of National Research-Development Institute for Animal Biology and Nutrition Balotesti. The genetic parameters were estimated with Restricted Maximum Likelihood method using Individual Animal Model. The estimates heritability were 0.249 for milk yield, 0.339 for fat yield and 0.315 for protein yield. The data were analysed with R software. The breeding values of the best Holstein cows for milk yield ranged from 21.13 to 176.97 l, for fat yield ranged from 5.178 to 35.34 kg and for protein yield ranged from 5.516 to 25.155 kg.


Keywords


breeding value; animal model; heritability, cows

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References


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LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
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FREQUENCY: Semiannual
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Bioengineering Faculty of Animal Resources
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