Asociación entre la resistencia genética al virus PRRS y los parámetros productivos de cerdos de líneas comerciales

• R.N. Pena ^[1] ; J. Estany ^[1] ; L. Fraile ^[1]
  1. [1] Universitat de Lleida

     Universitat de Lleida

     Lérida, España

     
• 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.), Joaquim Barcells Teres (aut.), Vol. 2, 2013, ISBN 978-84-695-7684-7, págs. 583-585
• Idioma: español
• Títulos paralelos:
  • Association between genetic resistance to PRRS virus and traits of pig production in commercial lines
• Enlaces
  • Texto Completo Libro  1 (pdf)   2 (pdf) 
• Resumen

  • The porcine reproductive and respiratory syndrome virus (PRRSV) is a serious concern for the pig sector as it promotes abortions in sows and respiratory problems, growth retardation and increases the probability to suffer other diseases in young pigs. As vaccines available are not highly effective there is a need to develop other tools in preventive medicine programs including selection for genetic resistance to this virus. We have previously shown that there is variability between and within genetic type regarding PRRSV resistance. Recently, the first genetic marker associated with genetic resistance to this virus has been published. This marker also exhibits pleiotropic effects on growth, where the presence of resistance-associated allele (G) increases weight gain in animals exposed to PRRSV. We show here that this marker segregates in five Spanish pig populations at frequencies similar to those of U.S. commercial hybrids. Data analysis of the average daily gain (ADG) suggest a possible protective effect of the G allele on growth in PRRSV-infected pigs while the A allele increases ADG in non-infected animals. This hypothesis needs to be contrasted before using this marker in PRRSV resistance selection. In particular, a good design should compare the ADG of the three genotypes in infected and uninfected pigs within each line.