Parasitisme et structuration génétique et spatiale : exemple chez le mouflon méditerranéen, Ovis gmelini musimon x Ovis sp

Elodie Portanier 1
1 Ecologie et évolution des populations
Département écologie évolutive [LBBE]
Abstract : Using as a case study the Mediterranean mouflon (Ovis gmelini musimon × Ovis sp.), we aimed at better understanding how are linked genetic diversity, individual behaviour, gene flows and parasitic dynamic. Using population and landscape genetics approaches, we showed that the spatial genetic structure of the studied population was determined by its introduction history, its socio-spatial structure and the landscape in which it evolves. Given the impact of these elements on mouflon gene flow, we expected them to also determine parasite transmission in the population. Our results nevertheless evidenced that parasite are better dispersed than mouflon genes. Finally, we showed that host resistance to parasites depends on neutral and adaptive genetic diversity, and more specifically on heterozygosity at a immunity-linked locus. Our results precisely describe genetic variability spatial distribution and its link with sanitary risks in the studied population, bringing crucial information for wild sheep population management and conservation in the current context of global changes and disease reemergence.
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Elodie Portanier. Parasitisme et structuration génétique et spatiale : exemple chez le mouflon méditerranéen, Ovis gmelini musimon x Ovis sp. Génétique des populations [q-bio.PE]. Université Montpellier, 2018. Français. ⟨NNT : 2018MONTG038⟩. ⟨tel-01954652⟩

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