Biodiversité/BiodiversityÉvolution temporelle de la diversité génétique de Chaerophyllum bulbosum : conséquences sur la gestion des ressources génétiquesTemporal evolution of the genetic diversity of Chaerophyllum bulbosum: Consequences on the genetic resources management

To increase the germplasm necessary for varietal improvement of tuberous-rooted chervil, a food apiaceae of increasing importance, two successive surveys of wild populations were carried out in Germany, in the Rhine and the Weser River basins. These mainly riparian populations are likely to be shaped by changes in hydrographic networks that characterize their habitat. Molecular studies have shown a strong structuration between wild populations (GST ∼ 32 %), but did not reveal any structuring effect of the hydrographic network on diversity or any global phenomenon of genetic erosion. A discussion about the strategy for maintaining the diversity of this species on a long-term period is proposed.