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XIX.—Family Selection in Poultry: the Use of Sire and Dam Family Averages in Choosing Male Parents*

Published online by Cambridge University Press:  11 June 2012

Robert Osborne
Robert Osborne
Affiliation:
Agricultural Research Council Poultry Research Centre, Edinburgh, 9
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Synopsis

A typical poultry flock consists of offspring from a number of sires each mated to several dams. In choosing male parents in a selection programme no criterion of individual merit may be available and selection must usually be based on the performance of related females. The present report deals with the theoretical efficiencies of three systems of selection of males

(1) on the average performance of the dam family of a male's sisters.

(2) on the average performance of the sire family of a male's full- and half-sisters.

(3) on a weighted combination of sire family and dam family averages.

For traits of low heritability system (2) may offer marked advantages over system (1), the only type of family selection previously investigated. This should prove of importance in flocks where recording facilities are limited. Providing environmental effects can be minimised, efficient selection may be based on the average performance of sire families housed as units without individual recording.

The efficiency of system (2) declines with increasing heritability and is also subject to complications introduced by population size. In all cases, however, optimum gains may be obtained on system (3) when both dam family and sire family records are available.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences , Volume 66 , Issue 4 , 1957 , pp. 374 - 393
Copyright
Copyright © Royal Society of Edinburgh 1957

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Footnotes

*

This paper was assisted in publication by a grant from the Carnegie Trust for the Universities of Scotland.

References

References to Literature

Dempster, E. R., and Lerner, I. M., 1947. “The optimum structure of breeding flocks”, Genetics, 32, 555–579.CrossRefGoogle ScholarPubMed
Fisher, R. A., and Yates, F., 1949. Statistical Tables, 3rd ed. Oliver & Boyd, Edinburgh.Google Scholar
Lerner, I. M., 1950. Population Genetics and Animal Improvement. Cambridge University Press.Google Scholar
Osborne, R., 1957. “The use of sire and dam family averages in increasing the efficiency of selective breeding under a hierarchical mating system”, Heredity, II, 93–116.CrossRefGoogle Scholar
Pearson, K., 1931 Tables for Statisticians and Biometricians. Part II.Biometric Laboratory, University College, London.Google Scholar