Exposé Chercheur Invité

Patterns of genetic diversity in Mediterranean forest tree species, and molecular signatures of natural selection and demographical events.

Giovanni G. VENDRAMIN (CNR, Firenze, Italie)

The Mediterranean area is characterised by a complex geological history and orogenic processes, a considerable physiographic and climatic heterogeneity, and a long-term impact of human activities that have caused repeated isolations of individual plant populations and admixtures of populations of different origins. This region shows a considerable diversity among and within plant populations, documented by a large number of studies based on the combined analysis of phylogeographical and palaeobotanical studies. Most of these surveys have focused on population dynamics that took place during the Quaternary and particularly after the last glacial maximum (about 18 000 years bp). Population genetic structure is a feature of paramount importance in evolutionary biology. Earlier comparative studies have shown that genetic structure depends on species ecological attributes and life history traits. Here I reevaluate the relationships between genetic structure and species traits in seed plants and I will provide some examples of phylogeographic studies and possible impact of history, human impact, and life history traits on the genetic structure of plant populations will be discussed.

Salle Silvolab (Campus de Kourou)

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