Millot Sandie, Péan Samuel, Labbé Laurent, Kerneis Thierry, Quillet Edwige, Dupont-Nivet Mathilde, Bégout Marie-Laure
Laboratoire Ressources Halieutiques, Ifremer, Place Gaby Coll, BP 7, 17137, L'Houmeau, France,
Behav Genet. 2014 Jul;44(4):383-93. doi: 10.1007/s10519-014-9652-z. Epub 2014 Mar 28.
The study of inter-individual variability of personality in fish is a growing field of interest but the genetic basis of this complex trait is still poorly investigated due to the difficulty in controlling fish genetic origin and life history. When available, isogenic lines that allow performing independent tests on different individuals having identical genotype constitute a very relevant experimental material to disentangle the genetic and environmental components of behavioural individuality. We took advantage of heterozygous isogenic lines to investigate the personality in rainbow trout through the analysis of their reactions to different experimental situations. To this end, seven to ten rainbow trout isogenic lines were screened for their spatial exploratory behaviour, their flight response toward a stressor and their risk taking behaviour. Results showed that some lines seemed less sensitive to new events or environmental changes and could be defined as low responsive, while others were very sensitive and defined as high responsive. The use of isogenic lines highlighted the importance of genetic factors, in combination with life history, in the expression of personality in domesticated fish.
鱼类个性的个体间变异性研究是一个日益受到关注的领域，但由于难以控制鱼类的遗传来源和生活史，这种复杂性状的遗传基础仍未得到充分研究。当有可用的同基因系时，它允许对具有相同基因型的不同个体进行独立测试，这构成了一种非常相关的实验材料，用于区分行为个体性的遗传和环境成分。我们利用杂合同基因系，通过分析虹鳟对不同实验情境的反应来研究其个性。为此，对七到十个虹鳟同基因系进行了空间探索行为、对压力源的逃避反应和冒险行为的筛选。结果表明，一些品系似乎对新事件或环境变化不太敏感，可以定义为低反应性，而另一些则非常敏感，定义为高反应性。同基因系的使用突出了遗传因素与生活史相结合在养殖鱼类个性表达中的重要性。
