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Estimation of genetic parameters for conformation traits assessed on a linear scale in ayrshire cattle

Published online by Cambridge University Press:  24 November 2017

HJ. Bellamy ,
R.A. Mrode  and
G.J.T. Swanson
HJ. Bellamy
Affiliation:
Milk Marketing BoardThames Ditton Surrey KT7 0EL
R.A. Mrode
Affiliation:
Milk Marketing BoardThames Ditton Surrey KT7 0EL
G.J.T. Swanson
Affiliation:
Milk Marketing BoardThames Ditton Surrey KT7 0EL
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Extract

Information on the conformation of Ayrshire cattle has been collected by the Ayrshire Cattle Society (ACS) since 1985. Seventeen traits are recorded on a scale of 1 to 9 where 1 and 9 represent the biological extremes of the population. Approximately 2000 records are collected annually and analysed by the Milk Marketing Board using Best Linear Unbiased Prediction to provide sire evaluations on Ayrshire bulls, fitting a sire model. In the past there have been insufficient records to produce reasonable estimates of heritabilities for the traits and those from the Holstein/Friesian population have been used. The purpose of this study was to produce heritability estimates for each trait for use in future analyses.

Type
Dairy Production
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 125
Copyright
Copyright © The British Society of Animal Production 1992

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References

Brotherstone, S. & Hill, W. G., 1991, Dairy Herd Life in Relation to Linear Type Traits and Production. 2 Genetic analyses for pedigree and non pedigree cows. Animal Production 53 289–298.Google Scholar
Meyer, K., 1986, Restricted Maximum Likelihood to estimate genetic parameters in practice. Proceedings of the 3rd World Congress on Genetics Applied to Livestock Production, Nebraska, Vol 12 p 454–459.Google Scholar
Patterson, H.D. & Thompson, R., 1971, Recovery of inter-block information when block sizes are unequal. Biometrika 58 545–554.Google Scholar
Swanson, G.J.T. & Bellamy, H J., 1991, Estimation of Genetic Parameters for conformation traits assessed on a linear scale in Friesian Holstein heifers. British Society of Animal Production Winter Meeting Proceedings, paper 169.Google Scholar