In what region was corn maize first cultivated?

The corn (english), maize (maya), zhuub or xhuub (zapotec), is believe that the first time was cultivated in Yagul in the valley of tlacolula in Oaxaca province, Mexico about 6,000 to 8,000 thousand years ago by the zapotec indians, which later became one of the greatest civilization of the Americas. Recently, archeologists discovered early types of maize in the area of tlacolula. Tlacolula's real name is Guish Baac (in zapotec language means "fertile land" or "land of heaven".) Today, the Oaxaca region have more than 50 species of maize.