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An Estimation of the Advances Achieved over Seven Years by Selection within Commercial Egg-Laying Breeds

Published online by Cambridge University Press:  13 March 2007

W. H Foster
Affiliation:
Agriculture Research Institute of Northern Ireland, Hillsborough, Co. Down, Department of Agriculture for Northern Ireland, and the Queen's University
S. T. C Weatherup
Affiliation:
Department of Agricultural Biometrics, Agriculture and Food Science Centre, Newforge Lane, Belfast, BT9 5PX.
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Abstract

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Type
Research Article
Copyright
Copyright © Cambridge University Press 1977

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References

Blow, W. L. and Glazener, E. W. (1953). The effect of inbreeding on some production characters in poultry. Poult. Sci. 32: 696.CrossRefGoogle Scholar
Casey, D. W. and Nordskog, A. W. (1971). Effects of selection for body weight, egg weight and heterozygosis on laying house performance. Poult. Sci. 50: 999.CrossRefGoogle Scholar
Chung, S. B. and Park, Y. I. (1969). Effects of inbreeding on the economic traits in hens. Res. Rep. Off. rur. Dev., Suwon, Korea. 12: 58. (A.B.A. 39: 3977).Google Scholar
Department of Agriculture For Northern Ireland (1974). Twelfth Random Sample Laying Test (Commercial Stock) 19731974.Google Scholar
King, S. C. (1966). Randombred controls measure breeders' genetic progress. 13th Wld's Poult. Congr.,Kiev. 21.Google Scholar
Ministry of Agriculture For Northern Ireland (19681973). Sixth, Seventh, Eighth, Tenth and Eleventh Random Sample Laying Tests (Commercial Stock) 19671968, 19681969, 19691970, 19711972, 19721973.Google Scholar
Shoffner, R. N. (1948). The reaction of the fowl to inbreeding. Poult. Sci. 27: 448.CrossRefGoogle Scholar
Snedecor, G. W. and Cochran, W. G. (1967). Statistical Methods, 6th ed. pp 432–426. Ames, lowa State College Press.Google Scholar
Stephenson, A. B. and Nordskog, A. W. (1950). Influence of inbreeding on egg production in the domestic fowl. Poult. Sci. 29: 781.Google Scholar
Wilson, W. O. (1948). Egg production rate and fertility in inbred chickens. Poult. Sci. 27: 719.CrossRefGoogle Scholar