Journal
SCIENCE
Volume 362, Issue 6420, Pages 1309-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aav0207
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Funding
- Natural Environment Research Council Independent Research Fellowship [NE/L012030/1]
- Science and Technology Facilities Council [ST/K001760/1]
- Science and Technology Facilities Council [ST/K001760/1] Funding Source: researchfish
- NERC [NE/L012030/1] Funding Source: UKRI
- STFC [ST/K001760/1] Funding Source: UKRI
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Domesticated maize evolved from wild teosinte under human influences in Mexico beginning around 9000 years before the present (yr B.P.), traversed Central America by similar to 7500 yr B.P., and spread into South America by similar to 6500 yr B.P. Landrace and archaeological maize genomes from South America suggest that the ancestral population to South American maize was brought out of the domestication center in Mexico and became isolated from the wild teosinte gene pool before traits of domesticated maize were fixed. Deeply structured lineages then evolved within South America out of this partially domesticated progenitor population. Genomic, linguistic, archaeological, and paleoecological data suggest that the southwestern Amazon was a secondary improvement center for partially domesticated maize. Multiple waves of human-mediated dispersal are responsible for the diversity and biogeography of modern South American maize.
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