Multiple lines of evidence for the origin of domesticated chili pepper, Capsicum annuum, in Mexico

Kraft Kraig H., Brown Cecil H., Nabhan Gary Paul, Luedeling Eike, De Jesus Luna Ruiz José, Coppens D'Eeckenbrugge Géo, Hijmans Robert J., Gepts Paul. 2014. Multiple lines of evidence for the origin of domesticated chili pepper, Capsicum annuum, in Mexico. Proceedings of the National Academy of Sciences of the United States of America, 111 (17) : 6165-6170.

Quartile : Outlier, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Economie-gestion; Psychologie-éthologie-ergonomie

Résumé : The study of crop origins has traditionally involved identifying geographic areas of high morphological diversity, sampling populations of wild progenitor species, and the archaeological retrieval of macroremains. Recent investigations have added identification of plant microremains (phytoliths, pollen, and starch grains), biochemical and molecular genetic approaches, and dating through 14C accelerator mass spectrometry. We investigate the origin of domesticated chili pepper, Capsicum annuum, by combining two approaches, species distribution modeling and paleobiolinguistics, with microsatellite genetic data and archaeobotanical data. The combination of these four lines of evidence yields consensus models indicating that domestication of C. annuum could have occurred in one or both of two areas of Mexico: northeastern Mexico and central-east Mexico. Genetic evidence shows more support for the more northern location, but jointly all four lines of evidence support central-east Mexico, where preceramic macroremains of chili pepper have been recovered in the Valley of Tehuacán. Located just to the east of this valley is the center of phylogenetic diversity of Proto-Otomanguean, a language spoken in mid-Holocene times and the oldest protolanguage for which a word for chili pepper reconstructs based on historical linguistics. For many crops, especially those that do not have a strong archaeobotanical record or phylogeographic pattern, it is difficult to precisely identify the time and place of their origin. Our results for chili pepper show that expressing all data in similar distance terms allows for combining contrasting lines of evidence and locating the region(s) where cultivation and domestication of a crop began.

Mots-clés Agrovoc : Capsicum annuum, domestication, biogéographie, technique analytique, écologie, génétique

Mots-clés géographiques Agrovoc : Mexique

Mots-clés complémentaires : Archéologie

Classification Agris : F70 - Taxonomie végétale et phytogéographie
F40 - Écologie végétale
F30 - Génétique et amélioration des plantes
000 - Autres thèmes

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Kraft Kraig H., UC (USA)
• Brown Cecil H., Northern Illinois University (USA)
• Nabhan Gary Paul, University of Arizona (USA)
• Luedeling Eike, ICRAF [World Agroforestry] (KEN)
• De Jesus Luna Ruiz José, Centro de Ciencias Agropecuarias (MEX)
• Coppens D'Eeckenbrugge Géo, CIRAD-BIOS-UMR CEFE (FRA) ORCID: 0000-0002-1970-0627
• Hijmans Robert J., UC (USA)
• Gepts Paul, UC (USA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/573328/)

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