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| Benhaim, David; Guyomard, Rene; Chatain, Beatrice; Quillet, Edwige; Begout, Marie-laure. |
| Because captivity constitutes a drastic environmental change, domestication is expected to induce a rapid genetic selection for behavioural traits. In this study, we searched for genetic differences in behaviour among brown trout juveniles from two strains differing for their domestication history, i.e. an almost pure native wild Mediterranean population (W) and an Atlantic domesticated strain (D). In order to assess pure genetic differences among strains, males from the two origins were mated with Mediterranean females to produce two experimental crosses (WW and WD). The swimming activity characteristics of individual WW and WD juveniles were compared before and after the application of a stress (light switched off suddenly, followed by a 5-min period of... |
| Tipo: Text |
Palavras-chave: Domestication; Genotyping; Microsatellite; Swimming activity; Restocking. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00152/26301/24409.pdf |
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| Hubert, Jean-noel; Allal, Francois; Hervet, Caroline; Ravakarivelo, Monique; Jeney, Zsigmond; Vergnet, Alain; Guyomard, Rene; Vandeputte, Marc. |
| The capacity of organisms to rapidly evolve in response to environmental changes is a key feature of evolution, and studying mutation compensation is a way to evaluate whether alternative routes of evolution are possible or not. Common carps (Cyprinus carpio) carrying a homozygous loss-of-function mutation for the scale cover gene fgfr1a1, causing the 'mirror' reduced scale cover, were introduced in Madagascar a century ago. Here we show that carps in Malagasy natural waters are now predominantly covered with scales, though they still all carry the homozygous mutation. We also reveal that the number of scales in mutated carps is under strong polygenic genetic control, with a heritability of 0.49. As a whole, our results suggest that carps submitted to... |
| Tipo: Text |
Palavras-chave: Evolution; Mutation compensation; Heritability. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00356/46681/46725.pdf |
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