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A note on analyses involving beef shape score sire evaluations of Friesian/Holstein bulls

Published online by Cambridge University Press:  02 September 2010

G. J. T. Swanson
G. J. T. Swanson
Affiliation:
Milk Marketing Board, Thames Ditton, Surrey KT7 OEL
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Abstract

The proportion of Holstein blood for each of 725 bulls progeny tested by the Milk Marketing Board, was obtained from a three generation pedigree. The bulls were grouped according to the proportion of Holstein blood and the means and standard deviations for their progeny tests for Beef Shape Score calculated. Only bulls with Beef Shape Scores based on an effective number of daughters of at least 20 were included. The mean Beef Shape Score decreased from 99·6 in pure Friesian bulls to 88·5 in pure Holsteins. Only four bulls within the pure or three-quarter (0·75) Holstein groups had a Beef Shape Score above the overall mean of 98·6 with the maximum being 102. The range of Beef Shape Scores for all bulls was 76 to 116.

The product moment correlations between Beef Shape Score and milk, fat and protein yields were −0·36, −0·35 and −0·32 respectively. These values were significantly different from zero (P < 0·01).

Type
Research Article
Information
Animal Production , Volume 39 , Issue 1 , August 1984 , pp. 141 - 144
Copyright
Copyright © British Society of Animal Science 1984

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References

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