Various Mexican wild grasses that are interfertile with corn. The wild ancestor of corn has been identified as Zea mays ssp. parviglumis, an annual teosinte growing in the Balsas river valley of southern Mexico. The initial domestication occurred about 9,000 years ago. See Chronology, 1939, Beadle; 2002, Matsuoka et al.; consilience, Zea mays spp mays.
Subjects: Genetics and Genomics.