9 Result(s)
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Ole Fredslund Christensen
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Article
Open AccessSelection for social genetic effects in purebred pigs improves behaviour and handling of their crossbred progeny
In commercial pig production, reduction of harmful social behavioural traits, such as ear manipulation and tail biting, is of major interest. Moreover, farmers prefer animals that are easy to handle. The aim o...
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Open AccessPredictive performances of animal models using different multibreed relationship matrices in systems with rotational crossbreeding
In livestock breeding, selection for some traits can be improved with direct selection for crossbred performance. However, genetic analyses with phenotypes from crossbred animals require methods for multibreed...
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Open AccessLarge-scale association study on daily weight gain in pigs reveals overlap of genetic factors for growth in humans
Imputation from genoty** array to whole-genome sequence variants using resequencing of representative reference populations enhances our ability to map genetic factors affecting complex phenotypes in livesto...
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Open AccessSelection for social genetic effects in purebreds increases growth in crossbreds
Average daily gain (ADG) in pigs is affected by both direct and social genetic effects (SGE). However, selection for SGE in purebreds has not conclusively been shown to improve ADG in crossbreds, and it is unk...
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Open AccessStatistical model and testing designs to increase response to selection with constrained inbreeding in genomic breeding programs for pigs affected by social genetic effects
Social genetic effects (SGE) are the effects of the genotype of one animal on the phenotypes of other animals within a social group. Because SGE contribute to variation in economically important traits for pig...
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Open AccessGenomic evaluation by including dominance effects and inbreeding depression for purebred and crossbred performance with an application in pigs
Improved performance of crossbred animals is partly due to heterosis. One of the major genetic bases of heterosis is dominance, but it is seldom used in pedigree-based genetic evaluation of livestock. Recently...
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Open AccessGenomic prediction using models with dominance and imprinting effects for backfat thickness and average daily gain in Danish Duroc pigs
Dominance and imprinting genetic effects have been shown to contribute to genetic variance for certain traits but are usually ignored in genomic prediction of complex traits in livestock. The objectives of thi...
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Open AccessGenome-wide association analyses using a Bayesian approach for litter size and piglet mortality in Danish Landrace and Yorkshire pigs
Litter size and piglet mortality are important traits in pig production. The study aimed to identify quantitative trait loci (QTL) for litter size and mortality traits, including total number of piglets born (...
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Open AccessGenomic prediction of crossbred performance based on purebred Landrace and Yorkshire data using a dominance model
In pig breeding, selection is usually carried out in purebred populations, although the final goal is to improve crossbred performance. Genomic selection can be used to select purebred parental lines for cross...
