Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Weeds as genetic resources.

Abstract

Weeds are often important as genetic resources. Weeds are also useful for evolutionary studies in connection with domestication, as indicators for autochthonous landraces and as basic material for weed control research. Several of the convergent weeds (crop plant mimicry, e.g. Agrostemma githago) with high similarity to crop plants are threatened by extinction. This process particularly affects the infraspecific variation (e.g. adaptations to different crops). A special approach for the ex situ conservation of weeds has been developed at Gatersleben gene bank within the concept of the integrated gene bank. Examples for the conservation of weeds in the Gatersleben gene bank are discussed (e.g. A. githago, Papaver rhoeas, Bromus secalinus and Lolium temulentum). In situ conservation of crop/weed complexes is a new challenge.