Adaptation Physiology Group, Wageningen University and Research, Wageningen, The Netherlands.
Animal Breeding and Genomics, Wageningen University and Research, Wageningen, The Netherlands.
Behav Genet. 2018 Sep;48(5):413-420. doi: 10.1007/s10519-018-9911-5. Epub 2018 Jun 19.
Selection for indirect genetic effects (IGE), i.e. the genetic effect of an individual on a trait of another individual, is a promising avenue to increase trait values in plant and animal breeding. Studies in livestock suggest that selection for IGE for growth (IGEg) might increase animals' capacity to tolerate stress. We assessed the effect of a stressful phase (weaning) on the behaviour and performance of pigs (n = 480) divergently selected for high or low IGEg. High IGEg pigs were significantly slower to explore the feed and gained less weight than low IGEg pigs in the days after weaning. In line with previous findings, high IGEg animals may have prioritized the formation of social ranks.
选择间接遗传效应（IGE），即个体对另一个体特征的遗传效应，是提高动植物育种中特征值的一种很有前途的方法。家畜研究表明，对生长的 IGE 进行选择（IGEg）可能会增加动物耐受压力的能力。我们评估了应激阶段（断奶）对具有高或低 IGEg 差异选择的猪（n=480）的行为和性能的影响。在断奶后的几天里，高 IGEg 猪探索饲料的速度明显较慢，体重增加也比低 IGEg 猪少。与之前的发现一致，高 IGEg 动物可能更优先形成社会等级。
