-
Article
Open AccessEstimation and consequences of direct-maternal genetic and environmental covariances in models for genetic evaluation in broilers
Maternal effects influence juvenile traits such as body weight and early growth in broilers. Ignoring significant maternal effects leads to reduced accuracy and inflated predicted breeding values. Including ge...
-
Article
Open AccessHeritability estimates of distichiasis in Staffordshire bull terriers using pedigrees and genome-wide SNP data
Distichiasis is the most frequently recorded eye disorder in the Norwegian Staffordshire bull terrier (SBT). The condition is often mild but can, in severe cases, lead to pain and blindness. The current study'...
-
Article
Open AccessHeritability of distichiasis in Havanese dogs in Norway
Distichiasis is a presumed inherited eyelid disease, characterized by misplaced eyelashes. The effect on eye health and animal welfare varies between individuals; most mild cases show no clinical signs, but so...
-
Article
Open AccessGenetic parameters and genomic prediction for feed intake recorded at the group and individual level in different production systems for growing pigs
In breeding programs, recording large-scale feed intake (FI) data routinely at the individual level is costly and difficult compared with other production traits. An alternative approach could be to record FI ...
-
Article
Open AccessCorrection: Prediction of breeding values for group-recorded traits including genomic information and an individually recorded correlated trait
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
-
Article
Open AccessPrediction of breeding values for group-recorded traits including genomic information and an individually recorded correlated trait
Records on groups of individuals could be valuable for predicting breeding values when a trait is difficult or costly to measure on single individuals, such as feed intake and egg production. Adding genomic in...
-
Article
Open AccessEffect of genomic selection and genoty** strategy on estimation of variance components in animal models using different relationship matrices
The traditional way to estimate variance components (VC) is based on the animal model using a pedigree-based relationship matrix (A) (A-AM). After genomic selection was introduced into breeding programs, it was a...
-
Article
Open AccessCorrection to: A bivariate genomic model with additive, dominance and inbreeding depression effects for sire line and three-way crossbred pigs
An amendment to this paper has been published and can be accessed via the original article.
-
Article
Open AccessThe predictive ability of indirect genetic models is reduced when culled animals are omitted from the data
Physical removal of individuals from groups causes reductions in group sizes and changes in group composition, which may affect the predictive ability of estimates of indirect genetic effects of animals on phe...
-
Article
Open AccessBias in estimates of variance components in populations undergoing genomic selection: a simulation study
After the extensive implementation of genomic selection (GS), the choice of the statistical model and data used to estimate variance components (VCs) remains unclear. A primary concern is that VCs estimated fr...
-
Article
Open AccessGenetic parameters for body weight and different definitions of residual feed intake in broiler chickens
The objectives of this study were to (1) simultaneously estimate genetic parameters for BW, feed intake (FI), and body weight gain (Gain) during a FI test in broiler chickens using multi-trait Bayesian analysi...
-
Article
Open AccessA bivariate genomic model with additive, dominance and inbreeding depression effects for sire line and three-way crossbred pigs
Crossbreeding is widely used in pig production because of the benefits of heterosis effects and breed complementarity. Commonly, sire lines are bred for traits such as feed efficiency, growth and meat content,...
-
Article
Open AccessModels with indirect genetic effects depending on group sizes: a simulation study assessing the precision of the estimates of the dilution parameter
In settings with social interactions, the phenotype of an individual is affected by the direct genetic effect (DGE) of the individual itself and by indirect genetic effects (IGE) of its group mates. In the pre...
-
Article
Open AccessEstimation of variance components and prediction of breeding values based on group records from varying group sizes
Records on groups of individuals rather than on single individuals could be valuable for predicting breeding values (BV) of the traits that are difficult or costly to measure individually, such as feed intake ...
-
Article
Open AccessSocial genetic effects for growth in pigs differ between boars and gilts
Average daily gain (ADG) in pigs is affected by the so-called social (or indirect) genetic effects (SGE). However, SGE may differ between sexes because boars grow faster than gilts and their social behaviours ...
-
Article
Open AccessVariance components and correlations of female fertility traits in Chinese Holstein population
The objective of the present study was to estimate (co)variance components of female fertility traits in Chinese Holsteins, considering fertility traits in different parities as different traits. Data on 88,64...
-
Article
Open AccessSparse single-step method for genomic evaluation in pigs
In many animal breeding programs, with the increasing number of genotyped animals, estimation of genomic breeding values by the single-step method is becoming limited by excessive computing requirements. A rec...
-
Article
Open AccessPartitioning of genomic variance reveals biological pathways associated with udder health and milk production traits in dairy cattle
We have used a linear mixed model (LMM) approach to examine the joint contribution of genetic markers associated with a biological pathway. However, with these markers being scattered throughout the genome, we...
-
Article
Open AccessGenomic evaluation of both purebred and crossbred performances
For a two-breed crossbreeding system, Wei and van der Werf presented a model for genetic evaluation using information from both purebred and crossbred animals. The model provides breeding values for both pureb...
-
Article
Open AccessSurvival, growth and sexual maturation in Atlantic salmon exposed to infectious pancreatic necrosis: a multi-variate mixture model approach
Outbreaks of infectious pancreatic necrosis (IPN) in Atlantic salmon can result in reduced growth rates in a fraction of the surviving fish (runts). Genetic and environmental variation also affects growth rate...
