caa a22 4500 388060638 CHVBK 20180307125119.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1017/S1357729800009693 doi S1357729800009693 pii (NATIONALLICENCE)cambridge-10.1017/S1357729800009693 The value of crossbreeding information in selection of poultry under a dominance model [Elektronische Daten] 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. Copyright © British Society of Animal Science 1998 dominance nationallicence selection nationallicence stochastic models nationallicence Uimari P. Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1E 2W1, Canada Gibson J. P. Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1E 2W1, Canada Animal Science Cambridge University Press 66/2(1998-04), 519-528 1357-7298 66:2<519 1998 66 ASC https://doi.org/10.1017/S1357729800009693 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1357729800009693 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Uimari P. Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1E 2W1, Canada NATIONALLICENCE 700 1- Gibson J. P. Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1E 2W1, Canada NATIONALLICENCE 773 0- Animal Science Cambridge University Press 66/2(1998-04), 519-528 1357-7298 66:2<519 1998 66 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge