The genomic origin of early maize in eastern North America

Jazmín Ramos-Madrigal*, Gayle J. Fritz, Bryon Schroeder, Bruce Smith, Fátima Sánchez-Barreiro, Christian Carøe, Anne Kathrine Wiborg Runge, Sarah Boer, Krista McGrath, Filipe G. Vieira, Shanlin Liu, Rute R. da Fonseca, Chunxue Guo, Guojie Zhang, Bent Petersen, Thomas Sicheritz-Pontén, Shyam Gopalakrishnan, M. Thomas P. Gilbert, Nathan Wales

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

Indigenous maize varieties from eastern North America have played an outsized role in breeding programs, yet their early origins are not fully understood. We generated paleogenomic data to reconstruct how maize first reached this region and how it was selected during the process. Genomic ancestry analyses reveal recurrent movements northward from different parts of Mexico, likely culminating in at least two dispersals from the US Southwest across the Great Plains to the Ozarks and beyond. We find that 1,000-year-old Ozark specimens carry a highly differentiated wx1 gene, which is involved in the synthesis of amylose, highlighting repeated selective pressures on the starch metabolic pathway throughout maize's domestication. This population shows a close affinity with the lineage that ultimately became the Northern Flints, a major contributor to modern commercial maize.

OriginalsprogEngelsk
TidsskriftCell
Vol/bind188
Udgave nummer1
Sider (fra-til)33-43.e16
Antal sider27
ISSN0092-8674
DOI
StatusUdgivet - 2025

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© 2024 Elsevier Inc.

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