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Master Thesis

Sélection génomique des races ovines laitières françaises : analyse des schémas actuels, première modélisation de scénarios génomiques et bilan technico-économique

Abstract : Over the last few years, genomic selection has become an important tool used in dairy cattle breeding programs. There are many arguments in support of the adoption of genomic selection in this species such as the reducing of the generation interval and the significant increase of the genetic gain. Therefore, the dairy sheep sector has invested in projects such as Genomia and Roquefort'in to study the technical and economical relevance of genomics in dairy sheep AI centres. First, the current breeding schemes were described to precisely assess the AI demand, the ram's capacity of diffusion, the actual breeding schemes organisation and their annual genetic gain. Thanks to the data gathered, we determine, for the Lacaune and Pyrenean breeds, the essential parameters required to establish a genomic selection program. The modelling of different genomic breeding design was studied in the case of the Lacaune breed. The first results are encouraging: the transition to genomics seems technically et economically feasible. The annual genetic gain could be increased up to 10 to 20% compared to the current one without increasing the scheme's costs. However, this is a preliminary modelling and has to be improved. Different parameters dealing with the genetic variability and mother-son pathway need to be taken into account. Furthermore, the modelling will be applied to the other breeds and specified in close co-operation with the different breeding companies and breed associations.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-00801194
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Submitted on : Friday, March 15, 2013 - 11:25:36 AM
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Diane Buisson. Sélection génomique des races ovines laitières françaises : analyse des schémas actuels, première modélisation de scénarios génomiques et bilan technico-économique. Sciences agricoles. 2012. ⟨dumas-00801194⟩

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