"A tale of two teosintes (and the origins of modern maize)", Jeffrey Ross-Ibarra, Professor, Department of Evolution and Ecology, College of Biological Sciences, UC Davis
In the talk I first discuss the role of adaptive introgression into maize from its wild relative teosinte. I then show how this admixture seems to have played a role in maize adaptation to both temperate and highland conditions in several parts of the Americas outside of the range of teosinte. I end with unpublished work that takes advantage of new sequencing and new ancient samples to show that indeed all modern maize appears to contain admixture from teosinte, implying a new model of maize domestication and spread. We posit an initial domestication of maize in Mexico that spread across the Americas, and that subsequently admixture with teosinte led to a new lineage which spread back out from the highlands of Mexico, replacing or mixing with local maize.
Source: BRS series