Perhaps as late as 1000 B.C. Also now a hexaploid oat, Avena sativa . No longer known in the wild. Typically grown in cold areas to feed animals. Disease resistance limits use in warmer parts of the world. Used by Romans.
Oats are high in protein and fat.
Often used to feed horses. Most important in the orient. Although originally domesticated in Asia, the exact site of origin is uncertain. Probably in India, Burma, Thailand, or Viet Nam. By the 15th century, rice was cultivated in both Spain and Portugal.