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Use of productive data to predict length of productive life in Iranian Holstein cattle

Published online by Cambridge University Press:  23 November 2017

A. Abdolmohammadi ,
M. Moradi Shahrebabak  and
S. R. M. Ashtiani
A. Abdolmohammadi*
Affiliation:
Department of Animal Science, Faculty of Agriculture, University of Tehran, Iran
M. Moradi Shahrebabak
Affiliation:
Department of Animal Science, Faculty of Agriculture, University of Tehran, Iran
S. R. M. Ashtiani
Affiliation:
Department of Animal Science, Faculty of Agriculture, University of Tehran, Iran
*
Email: mahdavi822005@yahoo.com
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Extract

Improvement of longevity by direct selection of sires based on theirs daughters’ longevity measures is impractical because of a low heritability and generation intervals prolonged by waiting until all cows complete their productive life. As an alternative to direct evaluation of sires for longevity is indirect prediction from genetically correlated production traits measures in the first lactation. The objectives this study were 1) to estimate genetic parameters of longevity and production traits 2) to examine relationships between longevity and first lactation milk production traits and 3) to determine selection index for sires’ longevity based on production traits.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2005 , 2005 , pp. 126
Copyright
Copyright © The British Society of Animal Science 2005

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References

Hoque, M. and Hodges, J. 1980. Genetic and phenotypic parameters of lifetime production traits in Holstein cows. J. Dairy. Sci. 63: 1900–1910.Google Scholar
Vukasinovic, N., Moll, J. and Kunzi, N. 1995. Genetic relationships among longevity, milk production, and type traits in Swiss brown cattle. Live. Pro. Sci. 41: 11–18.CrossRefGoogle Scholar