Les invasions biologiques en agriculture : point de vue de la biologie évolutive et de la génétique des population Biological invasions in agricultural settings: insights from evolutionary biology and population genetics

Invasion biology and agriculture are intimately related for several reasons and in particular because many agricultural pest species are recent invaders. In this paper we suggest that the reconstruction of invasion routes with population genetics-based methods can address fundamental questions in ecology and practical aspects of the management of biological invasions in agricultural settings. We provide a brief description of the methods used to reconstruct invasion routes and describe their main characteristics. In particular, we focus on a scenario — the bridgehead invasion scenario — which, until recently, had been overlooked. We show that this scenario, in which an invasive population is the