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Profiles of genetic changes of linear type in Holstein Friesians

Published online by Cambridge University Press:  23 November 2017

E. Wall
Affiliation:
Sustainable Livestock Systems, SAC, Bush Estate, Penicuik, Midlothian, EH26 0PH, UK
S. Brotherstone
Affiliation:
Sustainable Livestock Systems, SAC, Bush Estate, Penicuik, Midlothian, EH26 0PH, UK
M. P. Coffey
Affiliation:
Sustainable Livestock Systems, SAC, Bush Estate, Penicuik, Midlothian, EH26 0PH, UK
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Changes in body condition score and other linear type traits can be indicative of changes in body energy balance in dairy cattle (Coffey et al., 2003). As an animal proceeds through her lactation it is expected that body shape and fatness levels will change both with peaks and troughs of lactation as well as changes as the animal grows and matures. Wall et al. (2005) showed that udder support (US) was correlated to fertility; cows with weaker udders had poorer fertility. If there are differences between animals in terms of how their udders grow and mature across the first lactation, this could be indicative of health and fertility problems later in life. The aim of this study was to examine how type traits recorded in the national dairy population change over the first lactation and if there is a difference between sires in the type profiles of their daughters.

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Copyright © The British Society of Animal Science 2005

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References

Coffey, M.P., Simm, G., Will, W.G. and Brotherstone, S. 2003 Genetic evaluations of dairy bulls for daughter energy balance profiles using linear type scores and body condition score analyzed using random regression. Journal of Dairy Science 42: 22052212 CrossRefGoogle Scholar
Gilmour, A. R., Gogel, B. J., Cullis, B. R., Welham, S. J. and Thompson, R. 2002. ASReml User Guide Release 1.0 VSN International Ltd, Hemel Hempstead, HP1 1ES, UK.Google Scholar
Wall, E, White, I.S.M., Coffey, M.P. and Brotherstone, S., 2005. The relationship between fertility, rump and other type traits in Holstein Friesian cows. Proceedings of the Annual Meeting of BSAS, York, April 2005.Google Scholar

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