Camerlink Irene, Ursinus Winanda W, Bijma Piter, Kemp Bas, Bolhuis J Elizabeth
Department of Animal Sciences, Adaptation Physiology Group, Wageningen University, PO Box 338, 6700 AH, Wageningen, The Netherlands,
Behav Genet. 2015 Jan;45(1):117-26. doi: 10.1007/s10519-014-9671-9. Epub 2014 Sep 17.
Indirect genetic effects (IGEs) are heritable effects of an individual on phenotypic values of others, and may result from social interactions. We determined the behavioural consequences of selection for IGEs for growth (IGEg) in pigs in a G × E treatment design. Pigs (n = 480) were selected for high versus low IGEg with a contrast of 14 g average daily gain and were housed in either barren or straw-enriched pens (n = 80). High IGEg pigs showed from 8 to 23 weeks age 40% less aggressive biting (P = 0.006), 27% less ear biting (P = 0.03), and 40% less biting on enrichment material (P = 0.005). High IGEg pigs had a lower tail damage score (high 2.0; low 2.2; P = 0.004), and consumed 30 % less jute sacks (P = 0.002). Selection on high IGEg reduced biting behaviours additive to the, generally much larger, effects of straw-bedding (P < 0.01), with no G × E interactions. These results show opportunities to reduce harmful biting behaviours in pigs.
间接遗传效应（IGEs）是个体对其他个体表型值的可遗传效应，可能源于社会互动。我们在一个G×E处理设计中确定了对猪生长的间接遗传效应（IGEg）进行选择的行为后果。选择平均日增重相差14克的高IGEg猪和低IGEg猪（n = 480），并将它们饲养在贫瘠或铺有稻草的猪舍中（n = 80）。高IGEg猪在8至23周龄时攻击性咬斗行为减少40%（P = 0.006），耳部咬斗行为减少27%（P = 0.03），对富集材料的咬斗行为减少40%（P = 0.005）。高IGEg猪的尾巴损伤评分较低（高2.0；低2.2；P = 0.004），黄麻袋消耗量减少30%（P = 0.002）。选择高IGEg可减少咬斗行为，这是对通常更大的稻草垫料效应的补充（P < 0.01），且不存在G×E相互作用。这些结果表明有机会减少猪的有害咬斗行为。
