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Accueil du site → Doctorat → Allemagne → 2017 → Genetic erosion in crop wild relatives - wild barley, Hordeum vulgare subsp. spontaneum, a case study in Jordan

Martin-Luther-Universität Halle-Wittenberg (2017)

Genetic erosion in crop wild relatives - wild barley, Hordeum vulgare subsp. spontaneum, a case study in Jordan

Thormann, Imke

Titre : Genetic erosion in crop wild relatives - wild barley, Hordeum vulgare subsp. spontaneum, a case study in Jordan

Auteur : Thormann, Imke

Université de soutenance : Martin-Luther-Universität Halle-Wittenberg

Grade : Doktorgrades der Agrarwissenschaften (Dr. agr.) 2017

Résumé
Current pattern of diversity and its changes over time in situ were assessed in Hordeum vulgare subsp. spontaneum (K. Koch) Thell. in Jordan. Current population structure showed three distinct genetic clusters. Populations were characterized by admixture and high allelic richness, genetic diversity was higher in the northern part of Jordan. The comparison of populations from 1981 and 2012 showed that population structure was maintained but population differentiation was lower in 2012, while populations from 2012 showed higher genetic diversity. Multi-trait phenotypes differed between years. The climate became hotter and dryer over the study period. This observed complex response to environmental variation could not be explained by common correlative analyses that link genetic and phenotypic change with climate or geographic variation and require more complex models to interpret results and better predict vulnerability and extinction risk. The results suggest that in future studies on wild species growing in disturbed habitats and agricultural areas, agricultural and farmer practices should also be investiga

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