Title :

Temporal sampling helps unravel the genetic structure of naturally occurring populations of a phytoparasitic nematode. 2. Separating the relative effects of gene flow and genetic drift

Author(s) :

Gracianne, Cécile [Auteur]
VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement [VAS]
Institut de Génétique, Environnement et Protection des Plantes [IGEPP]
Jan, Pierre-Loup [Auteur]
Institut de Génétique, Environnement et Protection des Plantes [IGEPP]
Écologie et santé des écosystèmes [ESE]
Fournet, Sylvain [Auteur]
Institut de Génétique, Environnement et Protection des Plantes [IGEPP]
Olivier, Eric [Auteur]
Institut de Génétique, Environnement et Protection des Plantes [IGEPP]
Arnaud, Jean-Francois [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Porte, Catherine [Auteur]
Institut de Génétique, Environnement et Protection des Plantes [IGEPP]
Bardou-Valette, Sylvie [Auteur]
Institut de Génétique, Environnement et Protection des Plantes [IGEPP]
Denis, Marie-Christine [Auteur]
Institut de Génétique, Environnement et Protection des Plantes [IGEPP]
Petit, Eric [Auteur]
Écologie et santé des écosystèmes [ESE]

Journal title :

Evolutionary Applications

Pages :

1005-1016

Publisher :

Blackwell

Publication date :

2016-09

ISSN :

1752-4563

English keyword(s) :

assignment tests
Heterodera schachtii
gene flow
migration–drift equilibrium
wild nematode populations

HAL domain(s) :

Sciences du Vivant [q-bio]/Génétique/Génétique des populations [q-bio.PE]

English abstract : [en]

Studying wild pathogen populations in natural ecosystems offers the opportunity to better understand the evolutionary dynamics of biotic diseases in crops and to enhance pest control strategies. We used simulations and ...
Show more >Studying wild pathogen populations in natural ecosystems offers the opportunity to better understand the evolutionary dynamics of biotic diseases in crops and to enhance pest control strategies. We used simulations and genetic markers to investigate the spatial and temporal population genetic structure of wild populations of the beet cyst nematode Heterodera schachtii on a wild host plant species, the sea beet (Beta vulgaris spp. maritima), the wild ancestor of cultivated beets. Our analysis of the variation of eight microsatellite loci across four study sites showed that (i) wild H. schachtii populations displayed fine-scaled genetic structure with no evidence of substantial levels of gene flow beyond the scale of the host plant, and comparisons with simulations indicated that (ii) genetic drift substantially affected the residual signals of isolation-by-distance processes, leading to departures from migration–drift equilibrium. In contrast to what can be suspected for (crop) field populations, this showed that wild cyst nematodes have very low dispersal capabilities and are strongly disconnected from each other. Our results provide some key elements for designing pest control strategies , such as decreasing passive dispersal events to limit the spread of virulence among field nematode populations.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Évolution, Écologie et Paléontologie (Evo Eco Paleo) - UMR 8198

Source :

Harvested from HAL