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The origin and evolution of maize in the Southwestern United States
Univ Copenhagen, Ctr GeoGenet, DK-1350 Copenhagen, Denmark.;Univ Copenhagen, Bioinformat Ctr, DK-2200 Copenhagen, Denmark..
Smithsonian Inst, Natl Museum Nat Hist, Dept Anthropol, Program Human Ecol & Archaeobiol, Washington, DC 20560 USA..
Univ Copenhagen, Ctr GeoGenet, DK-1350 Copenhagen, Denmark..
Univ Copenhagen, Ctr GeoGenet, DK-1350 Copenhagen, Denmark..
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2015 (English)In: Nature Plants, ISSN 2055-026X, Vol. 1, no 1, UNSP 14003Article in journal (Refereed) PublishedText
Abstract [en]

The origin of maize (Zea mays mays) in the US Southwest remains contentious, with conflicting archaeological data supporting either coastal(1-4) or highland(5,6) routes of diffusion of maize into the United States. Furthermore, the genetics of adaptation to the new environmental and cultural context of the Southwest is largely uncharacterized(7). To address these issues, we compared nuclear DNA from 32 archaeological maize samples spanning 6,000 years of evolution to modern landraces. We found that the initial diffusion of maize into the Southwest about 4,000 years ago is likely to have occurred along a highland route, followed by gene flow from a lowland coastal maize beginning at least 2,000 years ago. Our population genetic analysis also enabled us to differentiate selection during domestication for adaptation to the climatic and cultural environment of the Southwest, identifying adaptation loci relevant to drought tolerance and sugar content.

Place, publisher, year, edition, pages
2015. Vol. 1, no 1, UNSP 14003
National Category
Agricultural Biotechnology Ecology
URN: urn:nbn:se:uu:diva-269290DOI: 10.1038/NPLANTS.2014.3ISI: 000364387500004OAI: oai:DiVA.org:uu-269290DiVA: diva2:882629
Wenner-Gren Foundations
Available from: 2015-12-15 Created: 2015-12-15 Last updated: 2015-12-15Bibliographically approved

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Jakobsson, Mattias
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