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Herd-by-cow interaction effects in dairy production records

Published online by Cambridge University Press:  02 September 2010

S. R. Searle
S. R. Searle
Affiliation:
Biometrics Unit, Cornell University, Ithaca, New York
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Summary

Records of cows each milked in two different herds have been used to estimate a component of variance due to cows that is free of variation arising from cow-by-herd interaction effects. By making use of a prior estimate of within-herd repeatability the variance component due to cow-by-herd interaction effects was estimated, and found to represent 35% of the total within-herd variance of butterfat yields and 9% of that of butterfat percentage records.

Type
Research Article
Information
Animal Production , Volume 5 , Issue 2 , June 1963 , pp. 157 - 164
Copyright
Copyright © British Society of Animal Science 1963

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References

REFERENCES

Brumby, P. J., 1961. The causes of differences in production between dairy herds. Anim. Prod., 3: 277.CrossRefGoogle Scholar
Castle, O. M. & Searle, S. R., 1957. Repeatability of dairy cow butterfat records in New Zealand. J. Dairy Sci., 40: 1277.CrossRefGoogle Scholar
Freeman, A. E. & Henderson, C. R., 1959. Genetic structure of dairy cattle herds in terms of additive and dominance relationships. J. Dairy Sci., 42: 621.CrossRefGoogle Scholar
Searle, S. R., 1960. Simplified herd-level age-correction factors. J. Dairy Sci., 43: 821.CrossRefGoogle Scholar
Searle, S. R., 1961. Part lactations. II. Genetic and phenotypic studies of monthly milk fat yields. J. Dairy Sci., 44: 282.CrossRefGoogle Scholar