Modern pig breeding schemes evaluate a large number of traits on specialized purebred breeding lines to improve the genetic makeup of crossbred animals used for pork production, but also for the next generation of purebred breeding animals. Much progress has been made regarding breeding for production and reproduction traits through the use of genomic information. However, pure line breeding is done under high health conditions for sanitary and trade reasons and the genetic variation in the group of traits around resilience is not fully exploited.
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