Dominance and epistatic genetic variances for litter size in pigs using genomic models
نویسندگان
چکیده
منابع مشابه
Estimating additive and dominance variances for complex traits in pigs combining genomic and pedigree information.
Knowledge of dominance effects should improve ge-netic evaluations, provide the accurate selection of purebred animals, and enable better breeding strategies, including the exploitation of het-erosis in crossbreeds. In this study, we combined genomic and pedi-gree data to study the relative importance of additive and dominance genetic variation in growth and carcass traits in an F2 pig populati...
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Dispersion parameters for the number of piglets born alive were estimated using a repeatability and random regression model. Six sow breeds/lines were included in the analysis: Swedish Landrace, Large White and both crossbred lines between them, German Landrace and their cross with Large White. Fixed part of the model included sow genotype, mating season as month-year interaction, parity and we...
متن کاملOrthogonal Estimates of Variances for Additive, Dominance, and Epistatic Effects in Populations.
Genomic prediction methods based on multiple markers have potential to include nonadditive effects in prediction and analysis of complex traits. However, most developments assume a Hardy-Weinberg equilibrium (HWE). Statistical approaches for genomic selection that account for dominance and epistasis in a general context, without assuming HWE (e.g., crosses or homozygous lines), are therefore ne...
متن کاملFactors Affecting Litter Size in Pigs
Litter size in pigs has been defined in a number of ways, depending on the goals of the specific experiment. Number of total piglets, including mummies and stillborns, number of fully formed piglets, excluding mummies but including stillborns, and the number of piglets born alive have all been used as endpoints of litter size research. The end measures are chosen with the idea that the causes o...
متن کاملAnalysis of litter size and average litter weight in pigs using a recursive model.
An analysis of litter size and average piglet weight at birth in Landrace and Yorkshire using a standard two-trait mixed model (SMM) and a recursive mixed model (RMM) is presented. The RMM establishes a one-way link from litter size to average piglet weight. It is shown that there is a one-to-one correspondence between the parameters of SMM and RMM and that they generate equivalent likelihoods....
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ژورنال
عنوان ژورنال: Genetics Selection Evolution
سال: 2018
ISSN: 1297-9686
DOI: 10.1186/s12711-018-0437-3