Introgression from local cultivars is a driver of agricultural adaptation in Argentinian weedy rice

Weedy rice, a pervasive and troublesome weed found across the globe, has often evolved through feralization of rice cultivars with little importance of crop-weed gene flow. In Argentina, weedy rice has been reported as an important constraint since early 1970s, and, in the last few years, strains with herbicide-resistance are suspected to evolve. Despite their importance, the origin and genetic composition of Argentinian weedy rice as well its adaptation to agricultural environments has not been explored so far. To study this, we genotyped-by-sequencing samples of Argentinian weedy and cultivated rice and compared them with published data of weedy, cultivated, and wild rice accessions worldwide distributed.