Análisis de canalización sobre el peso al nacimiento en la raza Bruna dels Pirineus
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[1] Universitat Autònoma de Barcelona
Universitat Autònoma de Barcelona
Barcelona, España
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[2] Institut de Recerca i Tecnologia Agroalimentaries
Institut de Recerca i Tecnologia Agroalimentaries
Barcelona, España
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- Localización: XV Jornadas sobre Producción Animal: 14 y 15 de mayo de 2013, Zaragoza / Jorge Hugo Calvo Lacosta (aut.), Isabel Casasús Pueyo (aut.), Margalida Joy Torrens (aut.), Javier Álvarez Rodríguez (aut.), Luis Varona Aguado (aut.), Begoña Panea Doblado (aut.), Carlos Calvete Margolles (aut.), Joaquín Balcells Teres (aut.), Vol. 2, 2013, ISBN 978-84-695-7684-7, págs. 526-528
- Idioma: español
- Títulos paralelos:
- Birth weight canalisation in Bruna dels Pirineus beef cattle breed
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Resumen
Canalisation models have provided new understanding on animal breeding programs and, more specifically, heteroscedacity has become a particular topic of interest in beef cattle. For this reason, birth weight was analyzed in the Bruna dels Pirineus beef cattle breed by canalisation models. The analysis was performed on 8,130 BW records collected between 1989 and 2010 in twelve purebred herds. Analytical models accounted for direct additive genetic, permanent environmental and four systematic effects; the residual term accounted for the same effects and they were checked by the deviance information criterion; only residual additive genetic, permanent environment, birth type and herd-year-season remained in the final model. The heteroscedastic model provided moderate heritability (0.30) whereas additional additive genetic variability was revealed in the residual term, this being positively correlated with the direct additive genetic component (0.44). This study must be viewed as a contribution to the canalisation research field, providing relevant information for the breeding scheme of the Bruna dels Pirineus breed.