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The value of crossbreeding information in selection of poultry under a dominance model

Published online by Cambridge University Press:  02 September 2010

P. Uimari  and
J. P. Gibson
P. Uimari
Affiliation:
Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1E 2W1, Canada
J. P. Gibson
Affiliation:
Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1E 2W1, Canada
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Abstract

A stochastic simulation was used to investigate the value of crossbreeding information in a two line crossbreeding system in poultry under different genetic scenarios. Populations consisted of 25 sires and 250 dams, which were mated to produce both purebred and crossbred progeny. The next generation parents were selected either based on purebred information (PLS) (sib means, and own performance for females) or additional crossbred sib means were included (CCPS). The trait under selection was controlled by 20 loci with varying degree of dominance. Pure lines differed in initial allele frequencies. If the trait was controlled by loci with partial dominance, little or no extra benefit was obtained from including crossbred information over the pure line information. Under complete dominance and overdominance CCPS outperformed PLS. As a practical rule, CCPS is better than PLS if the ratio between dominance variance and total genetic variance is around 0·3 or higher. In this case the most probable cause of the dominance variation is loci with full or overdominance.

Keywords

dominanceselectionstochastic models
Type
Research Article
Information
Animal Science , Volume 66 , Issue 2 , April 1998 , pp. 519 - 528
Copyright
Copyright © British Society of Animal Science 1998

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References

Bell, A. E. 1982. Selection for heterosis — results with laboratory and domestic animals. Proceedings of the second world congress on genetics applied to livestock production, Madrid, vol. 6, pp. 206–227.Google Scholar
Fairfull, R. W. 1990. Heterosis. In Poultry breeding and genetics (ed. Crawford, R. D.), pp. 913–934. Elsevier Science Publishing Company Inc., Amsterdam.Google Scholar
Falconer, D. S. and Mackay, T. F. C. 1996. Introduction to quantitative genetics, fourth edition. Longman, Essex.Google Scholar
Hill, W. G. 1970. Theory of limits to selection with line crossing. In Mathematical topics in population genetics (ed. , Kojima), pp. 210–245. Springer-Verlag, Berlin.Google Scholar
Hunton, P. 1990. Industrial breeding and selection. In Poultry breeding and genetics (ed. Crawford, R. D.), pp. 985–1028. Elsevier Science Publishing Company Inc., Amsterdam.Google Scholar
Sellier, P. 1982. Selecting populations for use in crossbreeding. Proceedings of the second world congress genetics applied to livestock production, Madrid, vol. 6, pp 15–49.Google Scholar
Wei, M. 1992. Combined crossbred and purebred selection i n animal breeding. Ph.D. thesis, Wageningen Agricultural University.Google Scholar
Wei, M. and Steen, H. A. M. van der. 1991. Comparison of reciprocal recurrent selection with pure-line selection systems in animal breeding (a review) Animal Breeding Abstracts 59: 281–298.Google Scholar
Wei, M. and Werf, J. H. J. van der. 1993. Animal model estimation of additive and dominance variances in egg production traits of poultry Journal of Animal Science 71: 57–65.Google Scholar
Wei, M. and Werf, J. H. J. van der. 1994. Maximizing genetic response in crossbreds using both purebred and crossbred information Animal Production 59: 401–413.Google Scholar
Wei, M., Werf, J. H. J. van der and Brascamp, E. W. 1991. Relationship between purebred and crossbred parameters, II. Genetic correlation between purebred and crossbred performance under the model with two loci. Journal of Animal Breeding and Genetics 108: 262–269.Google Scholar