logo umr
Génétique Quantitative et Évolution - Le Moulon

Visioconférence

How teosinte became a weed in Europe: the role of genetic exchange with cultivated maize

Valérie LE CORRE

VisioSémIDEEV à l’UMR Génétique Quantitative et Évolution – Le Moulon

Visioconférence sur

https://office.moulon.inra.fr/nextcloud/index.php/apps/bbb/b/LjJcnAyxc2bzq8tf

Vendredi 6 novembre 2020 à 12h00

Valérie LE CORRE

INRAE - UMR 1347 Agroécologie, Dijon

invitée par Maud Tenaillon

« How teosinte became a weed in Europe: the role of genetic exchange with cultivated maize »

Abstract

The emergence of new weeds poses a serious threat to agricultural production. Understanding their origin and evolution is therefore of major importance. We analyzed the intriguing case of teosinte, a wild relative of maize originating from Mexico that recently emerged as an invasive weed in maize fields in Europe. Patterns of genetic variation revealed extensive genetic introgression from maize adapted to temperate latitudes into European teosintes. Introgressed genomic regions harbored a key flowering time gene and an herbicide resistance gene. Our results exemplify how adaptive introgression can drive the evolution of a crop’s wild relative into a weed. Hybridization is an evolutionary force that should not be underestimated when forecasting invasiveness risks.

Voir aussi :