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Development of a new crossbred based evaluation for carcass quality of piétrain boars in the walloon region of Belgium
Dufrasne, Marie; Hammami, Hedi; Jaspart, Véronique et al.
2010In Book of Abstracts of the 61th Annual Meeting of the European Association for Animal Production
Peer reviewed
 

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Keywords :
genetic estimate; multitrait animal model; BLUP
Abstract :
[en] The aim of this study was to develop a genetic evaluation model to estimate the genetic merit of Piétrain boars for some carcass quality traits. These boars are now evaluated on performances recorded on their crossbred progeny fattened in a central test station. Data provided by the on-farm performance recording system were utilized in this study. Traits analysed were backfat thickness (BF) and lean meat percentage (%meat). The data file contains 60 546 records measured on pigs between 150 and 300 days of age. Model developed was a multitrait animal model. Fixed effects were sex, contemporary groups and heterosis, modeled as regression on heterozygosity. Random effects were additive genetic and permanent environment, modeled by random regressions using linear splines, and residual. Variance components were estimated by restricted maximum likelihood (REML) method on random samples of the total dataset and then confirmed by a Gibbs sampling algorithm on the total dataset. Fit of the model was tested by computing residuals from a BLUP (Best Linear Unbiased Prediction) evaluation. BF and %meat have a high heritability that increase with age. These two traits are also highly genetically correlated. Mean residuals are not significantly different from zero for both traits. Given that BF and %meat had high heritability, genetic improvement of carcass quality is possible by selection on these two traits. Like residuals are close to zero for both traits, it seems that model developed explain a great proportion the variance in each traits.
Disciplines :
Animal production & animal husbandry
Genetics & genetic processes
Author, co-author :
Dufrasne, Marie ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Hammami, Hedi ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Jaspart, Véronique
Wavreille, José
Gengler, Nicolas  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Language :
English
Title :
Development of a new crossbred based evaluation for carcass quality of piétrain boars in the walloon region of Belgium
Publication date :
24 August 2010
Event name :
61th Annual Meeting of the European Federation of Animal Science
Event organizer :
EAAP - European Federation of Animal Science
Event place :
Heraklion, Greece
Event date :
23-27 August 2010
Audience :
International
Main work title :
Book of Abstracts of the 61th Annual Meeting of the European Association for Animal Production
Publisher :
Wageningen Academic Publishers, Wageningen, Netherlands
Edition :
Heraklion 2010
ISBN/EAN :
978-90-8686-152-1
Collection name :
Nº. 16
Pages :
287
Peer reviewed :
Peer reviewed
Available on ORBi :
since 02 September 2010

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