Abstract
Crosses betweenTripsacum dactyloides and teosinte (Zea diploperennis) using standard pollination technique have been successfully attempted and six highly fertile hybrid plants obtained. Previous research had shown other teosintes to be cross-incompatible with Tripsacum and maize to be crossable but highly intersterile withTripsacum. Some investigators believe thatTripsacum played a prominent role in the origin of maize; theTripsacum-diploperennis hybrid provides evidence to support that idea. Ears produced by the hybrid have paired kernel rows, a distinctive characteristic of the oldest archaeological maize that none of the wild relatives have. This unique hybrid is described and discussed in terms of its possible role in the origin and evolution of maize.
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