Dissertation/ Thesis
Genetic diversities in Anemonia viridis holobiont : from host morphotypes to symbiotic diversity ; Diversités génétiques chez l’holobiote Anemonia viridis : des morphotypes de l’hôte à la différenciation symbiotique
| العنوان: | Genetic diversities in Anemonia viridis holobiont : from host morphotypes to symbiotic diversity ; Diversités génétiques chez l’holobiote Anemonia viridis : des morphotypes de l’hôte à la différenciation symbiotique |
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| المؤلفون: | Porro, Barbara |
| المساهمون: | Institut de Recherche sur le Cancer et le Vieillissement (IRCAN), Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UniCA), COMUE Université Côte d'Azur (2015 - 2019), Paola Furla, Didier Forcioli |
| المصدر: | https://theses.hal.science/tel-02736573 ; Biodiversité et Ecologie. COMUE Université Côte d'Azur (2015 - 2019), 2019. Français. ⟨NNT : 2019AZUR4071⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2019 |
| المجموعة: | HAL Université Côte d'Azur |
| مصطلحات موضوعية: | Mutualistic symbiosis, Holobiont, Morphological differentiation, Genetic diversity, Symbiont acquisition, Clonality, Species complex, Symbiose mutualiste, Holobiote, Différenciation morphologique, Diversité génétique, Acquisition des symbiotes, Clonalité, Complexe d’espèces, [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
| الوصف: | What is an individual ? This apparently naive question is actually the first step of studies of population genetics and evolutionary biology, but is non-trivial in symbiotic organisms. The interaction among a host and its symbiotic micro-organisms can influence the development, the reproduction and the adaptative capacities of the holobiont and the evolutives trajectories of species. If we want to understand these interactions, we have to decipher the complexity of symbiotic interactions by characterizing the different partners and to measure the role of each partner in the proper functioning of the holobiont. In Anemonia viridis (as in many other Cnidarians), the animal hosts can live in mutualistic symbiosis with photosynthetic Dinoflagellates belonging to the Symbiodiniaceae family (with one Symbiodiniaceae clade for A. viridis). This anemone displays different colour morphs. To understand the origin of the phenotypic diversity but also to measure the associated symbiotic diversity, we genotyped sea anemones from English Channel and Mediterranean Sea with RAD sequencing (for the animal host) and targeted markers, the ITS2 and microsatellite markers (for the symbionts). Our studies revealed several sympatric host genetic lineages which were not congruent with the morphological differentiation. In addition, the symbiotic diversity was not correlated with host genetic lineages but with the sampling location of sea anemones. These results revealed that A. viridis is actually a species complex with both intergenerational vertical transmission and probably an additional horizontal acquisition of Symbiodiniaceae. Because A. viridis shows a dynamic symbiosis, selection can act independently on both the symbiotic composition and the host. This makes A. viridis an interesting laboratory model to understand adaptative capacities in an holobiont. ; Qu’est-ce qu’un individu ? Cette question est un prérequis pour toutes les études en génétique des populations et en biologie évolutive, mais elle est loin d’être naïve dès ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| Relation: | NNT: 2019AZUR4071; tel-02736573; https://theses.hal.science/tel-02736573; https://theses.hal.science/tel-02736573/document; https://theses.hal.science/tel-02736573/file/2019AZUR4071.pdf |
| الاتاحة: | https://theses.hal.science/tel-02736573 https://theses.hal.science/tel-02736573/document https://theses.hal.science/tel-02736573/file/2019AZUR4071.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.FA3FF8A8 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |