Busting myths to broaden our horizons
نویسندگان
چکیده
Historically, pig breeding programs have focused on a limited number of traits. Often growth rate, back fat and a measure of litter size at birth were the only traits considered. Genetic relationships with other unrecorded traits were ignored in this simple approach, although selection for these traits leads to correlated responses in feed efficiency, lean meat growth, carcase characteristics, meat quality, survival of piglets, disease resistance as well as characteristics of the sow such as mature weight, body composition and feed intake capacity. This long list of traits may seem daunting. However, ignoring (unfavourable) genetic associations between traits in pig breeding programs will lead to sub-optimal performance and ultimately impair health and welfare of pigs and sows (e.g. Rauw et al., 1998; Prunier et al., 2010).
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