Domestication and lowland adaptation of coastal preceramic maize from Paredones, Peru. Vallebueno-Estrada, M., Hernández-Robles, G. G, González-Orozco, E., Lopez-Valdivia, I., Rosales Tham, T., Vásquez Sánchez, V., Swarts, K., Dillehay, T. D, Vielle-Calzada, J., & Montiel, R. eLife, 12:e83149, April, 2023. Publisher: eLife Sciences Publications, Ltd![Domestication and lowland adaptation of coastal preceramic maize from Paredones, Peru [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Archaeological cobs from Paredones and Huaca Prieta (Peru) represent some of the oldest maize known to date, yet they present relevant phenotypic traits corresponding to domesticated maize. This contrasts with the earliest Mexican macro-specimens from Guila Naquitz and San Marcos, which are phenotypically intermediate for these traits, even though they date more recently in time. To gain insights into the origins of ancient Peruvian maize, we sequenced DNA from three Paredones specimens dating ~6700–5000 calibrated years before present (BP), conducting comparative analyses with two teosinte subspecies (Zea mays ssp. mexicana and parviglumis) and extant maize, that include highland and lowland landraces from Mesoamerica and South America. We show that Paredones maize originated from the same domestication event as Mexican maize and was domesticated by ~6700 BP, implying rapid dispersal followed by improvement. Paredones maize shows no relevant gene flow from mexicana, smaller than that observed in teosinte parviglumis. Thus, Paredones samples represent the only maize without confounding mexicana variation found to date. It also harbors significantly fewer alleles previously found to be adaptive to highlands, but not of alleles adaptive to lowlands, supporting a lowland migration route. Our overall results imply that Paredones maize originated in Mesoamerica, arrived in Peru without mexicana introgression through a rapid lowland migration route, and underwent improvements in both Mesoamerica and South America.
@article{vallebueno-estrada_domestication_2023,
title = {Domestication and lowland adaptation of coastal preceramic maize from {Paredones}, {Peru}},
volume = {12},
issn = {2050-084X},
url = {https://doi.org/10.7554/eLife.83149},
doi = {10.7554/eLife.83149},
abstract = {Archaeological cobs from Paredones and Huaca Prieta (Peru) represent some of the oldest maize known to date, yet they present relevant phenotypic traits corresponding to domesticated maize. This contrasts with the earliest Mexican macro-specimens from Guila Naquitz and San Marcos, which are phenotypically intermediate for these traits, even though they date more recently in time. To gain insights into the origins of ancient Peruvian maize, we sequenced DNA from three Paredones specimens dating {\textasciitilde}6700–5000 calibrated years before present (BP), conducting comparative analyses with two teosinte subspecies (Zea mays ssp. mexicana and parviglumis) and extant maize, that include highland and lowland landraces from Mesoamerica and South America. We show that Paredones maize originated from the same domestication event as Mexican maize and was domesticated by {\textasciitilde}6700 BP, implying rapid dispersal followed by improvement. Paredones maize shows no relevant gene flow from mexicana, smaller than that observed in teosinte parviglumis. Thus, Paredones samples represent the only maize without confounding mexicana variation found to date. It also harbors significantly fewer alleles previously found to be adaptive to highlands, but not of alleles adaptive to lowlands, supporting a lowland migration route. Our overall results imply that Paredones maize originated in Mesoamerica, arrived in Peru without mexicana introgression through a rapid lowland migration route, and underwent improvements in both Mesoamerica and South America.},
urldate = {2024-03-22},
journal = {eLife},
author = {Vallebueno-Estrada, Miguel and Hernández-Robles, Guillermo G and González-Orozco, Eduardo and Lopez-Valdivia, Ivan and Rosales Tham, Teresa and Vásquez Sánchez, Víctor and Swarts, Kelly and Dillehay, Tom D and Vielle-Calzada, Jean-Philippe and Montiel, Rafael},
editor = {Weigel, Detlef},
month = apr,
year = {2023},
note = {Publisher: eLife Sciences Publications, Ltd},
keywords = {domestication, lowlands, paleogenomics, paredones},
pages = {e83149},
}
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This contrasts with the earliest Mexican macro-specimens from Guila Naquitz and San Marcos, which are phenotypically intermediate for these traits, even though they date more recently in time. To gain insights into the origins of ancient Peruvian maize, we sequenced DNA from three Paredones specimens dating ~6700–5000 calibrated years before present (BP), conducting comparative analyses with two teosinte subspecies (Zea mays ssp. mexicana and parviglumis) and extant maize, that include highland and lowland landraces from Mesoamerica and South America. We show that Paredones maize originated from the same domestication event as Mexican maize and was domesticated by ~6700 BP, implying rapid dispersal followed by improvement. Paredones maize shows no relevant gene flow from mexicana, smaller than that observed in teosinte parviglumis. Thus, Paredones samples represent the only maize without confounding mexicana variation found to date. 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