Estimating additive and dominance variances for complex traits in pigs combining genomic and pedigree information

• Autor(a) principal: Costa, E.V.
• Data de Publicação: 2015
• Outros Autores: Diniz, D.B., Veroneze, R., Resende, M.D.V., Azevedo, C.F., Guimaraes, S.E.F., Silva, F.F., Lopes, P.S.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://dx.doi.org/10.4238/2015.June.11.4; http://www.locus.ufv.br/handle/123456789/12142
• topic: Dominance; Genetic Parameters; Polygenic effect; Piau pigs

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 population. Two GBLUP models were used, a model without a polygenic effect (ADM) and a model with a polygenic effect (ADMP). Additive effects played a greater role in the control of growth and carcass traits than did dominance effects. However, dominance effects were important for all traits, particularly in backfat thickness. The narrow-sense and broad-sense heritability estimates for growth (0.06 to 0.42, and 0.10 to 0.51, respectively) and carcass traits (0.07 to 0.37, and 0.10 to 0.76, respec-tively) exhibited a wide variation. The inclusion of a polygenic effect in the ADMP model changed the broad-sense heritability estimates only for birth weight and weight at 21 days of age.