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Domestication traits in maize. (A, Left) An example of a Z. mays ssp. parviglumis (teosinte) ear vs. (A, Right) a domesticated Z. mays ssp. mays ear. Shoot architecture of (B) teosinte and (C) maize, which is controlled by the tb1 gene. Image credit: John Doebley (University of Wisconsin, Madison, WI).
