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Sensitivity of genotypes to feeding systems for production, weight and feed intake in dairy cattle

Published online by Cambridge University Press:  20 November 2017

J.E. Pryce
Affiliation:
Animal Biology Division, Scottish Agricultural College, West Mains Road, Edinburgh, EH9 3JG, UK
R.F. Veerkamp
Affiliation:
Genetics and Reproduction, ID-Lelystad, PO Box 65, 8200 AB Lelystad, The Netherlands
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Extract

Getting reliable genetic parameter estimates for dry matter intake is difficult because recording it is expensive, hence it is tempting to combine data from research herds. However, there are large differences in feeding and management systems, which causes differences in means across herds. Furthermore, variances or heritabilities may differ and genetic correlations may be less than one between herds. This is one of the reasons why it is important to investigate effects of genotype by environment interaction (GxE). Another reason is that it is important to understand how high genetic merit cows perform in different feeding systems. The objective of this study was to estimate the effect of GxE for three feeding systems at two research herds belonging to ID-Lelystad (ID) and to SAC/University of Edinburgh (Langhill).

Type
Poster Presentations
Copyright
Copyright © The British Society of Animal Science 2000

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References

Gilmour, A.R., Cullis, B.R., Welham, S.J. and Thompson, R. 1999. ASREML user manual. New South Wales Agriculture, Orange Agricultural Institute, Forest Road, Orange, NSW, 2800, AustraliaGoogle Scholar