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Ludwig-Maximilians-Universität (2012)

Molecular evolution in wild tomato species : with emphasis on local adaptation to abiotic stress

Fischer, Iris

Titre : Molecular evolution in wild tomato species : with emphasis on local adaptation to abiotic stress

Auteur : Fischer, Iris.

Université de soutenance : Ludwig-Maximilians-Universität

Grade : Doctor of Philosophy (PhD) 2012

Résumé
Understanding the mechanisms of local adaptation of wild species is a central issue in evolutionary biology. DNA sequence data allows investigating the recent demographic history of organisms. Knowledge of this history makes it possible to quantify adaptive and deleterious mutations and to analyze local adaptation at candidate genes taking the demographic context into account. As modulation of gene expression is crucial for an organism’s survival during stress conditions, a next step to investigate adaptation is to study the expression profile of candidate genes. Wild species are more valuable systems to investigate local adaptation than model organisms as key issues in ecology and evolution of the later cannot be addressed properly in some cases. Wild tomato species provide several advantages when studying adaptation to abiotic stress : they grow in diverse environments – ranging from mesic to extremely arid conditions – and its genomic information is available from the cultivated relative.

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Page publiée le 16 juin 2013, mise à jour le 11 mai 2019