AI Article Synopsis
- Domesticated maize originated from wild teosinte in Mexico around 9000 years ago, spreading through Central and South America over the next few millennia.
- Ancestral maize populations in South America were isolated from the wild teosinte gene pool before fully developing domesticated traits.
- Various human influences contributed to the genetic diversity and distribution of modern South American maize, with the southwestern Amazon serving as a secondary center for its improvement.
Article Abstract
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 ~7500 yr B.P., and spread into South America by ~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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| http://dx.doi.org/10.1126/science.aav0207 | DOI Listing |
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