Étude de la variabilité génétique de populations sauvages et captives de la perche eurasienne Perca fluviatilis, espèce en cours de domestication

Abstract : The diversification of production, by the domestication of new fish species, is one of the possible solutions for sustainable aquaculture. In this context, the farming of the Eurasian perch, Perca fluviatilis, has developed well in recent years allowing today a stable and increasing production. The progress of the sector requires, among others, the establishment of breeding programs to improve, growth, reproduction and disease resistance. For this, the genetic characterization of currently farmed fish stocks is an essential prerequisite to assess whether genetic variation is sufficient. In this work, we analyzed the genetic variability among wild populations of two alpine lakes (lakes Geneva and Neuchâtel) whose populations are used by fish farmers to establish their stocks. We found one panmictic population in Lake Geneva, while two sub-populations were identified in Lake Neuchâtel, whose genetic variability is higher. However, those wild populations are not found in captive stocks. In addition, the genetic variability is higher in captive populations. Between parents and their offspring, the genetic diversity has not decreased despite a small increase in inbreeding. Thus, this work will allow fish farmers to set up a real genetic management of their stocks and subsequently to develop breeding programs. Moreover, it provides a better understanding of the possible links between the process of domestication and the evolution of genetic variability
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Theses
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http://docnum.univ-lorraine.fr/prive/DDOC_T_2015_0197_BEN_KHADHER.pdf
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https://hal.univ-lorraine.fr/tel-01754452
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Submitted on : Friday, March 30, 2018 - 9:49:42 AM
Last modification on : Saturday, March 31, 2018 - 1:28:08 AM

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  • HAL Id : tel-01754452, version 1

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Sana Ben Khadher. Étude de la variabilité génétique de populations sauvages et captives de la perche eurasienne Perca fluviatilis, espèce en cours de domestication. Sciences agricoles. Université de Lorraine, 2015. Français. ⟨NNT : 2015LORR0197⟩. ⟨tel-01754452⟩

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