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Estimates of genetic parameters for test day somatic cell count fitting orthogonal polynomials

Published online by Cambridge University Press:  20 November 2017

R. A. Mrode ,
G. J. T. Swanson  and
C. M. Lindberg
R. A. Mrode
Affiliation:
Animal Data Centre, Fox Talbot House, Greenways Business Park, Chippenham, Wiltshire, SN15 1BN, U.K.
G. J. T. Swanson
Affiliation:
Animal Data Centre, Fox Talbot House, Greenways Business Park, Chippenham, Wiltshire, SN15 1BN, U.K.
C. M. Lindberg
Affiliation:
Animal Data Centre, Fox Talbot House, Greenways Business Park, Chippenham, Wiltshire, SN15 1BN, U.K.
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Extract

Genetic evaluations in the United Kingdom (UK) for Somatic Cell Count (SCC) are currently based on a single trait repeatability model using the first five lactations. Only cows with completed lactations are included. However, to utilise information from cows with part lactation records and to achieve a better correction for environmental effects, a test day model (TDM) evaluation would be preferred. The objective of this study is to estimate genetic parameters needed for such a TDM evaluation by utilising a random regression (RR) approach.

Type
Threatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2001 , 2001 , pp. 15
Copyright
Copyright © The British Society of Animal Science 2001

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References

Gilmour, A. R., Cullis, B. R., Welham, S. J. and Thompson, R. 1999. ASREML Reference Manual. NSCO Agricultural Biometric Bulletin No. 3, Australia.Google Scholar
Mrode, R. A., Swanson, G. J. T. and Winters, M. S. 1998. Genetic parameters and evaluations for somatic cell count and its relationship with production and type traits in some dairy breeds in the United Kingdom. Animal Science 66: 569–576 Google Scholar