Domesticação do milho: pelo menos há 8.700 anos
Maize was domesticated from its wild ancestor more than 8,700 years according to biological evidence uncovered by researchers in the Mexico’s Central Balsas River Valley. This is the earliest dated evidence — by 1,200 years — for the presence and use of domesticated maize.
Referências:
Ranere, A. et al. (2009) - The Cultural and chronological context of early Holocene maize and squash domestication in the Central Balsas River Valley, Mexico. PNAS, March 23. Link
Piperno, D. et al. (2009) - Starch grain and phytolith evidence for early ninth millennium B.P. maize from the Central Balsas River Valley, Mexico. PNAS, March 23. Link