According to the invention, there is provided a hybrid maize plant, designated
as 33D31, produced by crossing two Pioneer Hi-Bred International, Inc. proprietary
inbred maize lines. This invention relates to the hybrid seed 33D31, the hybrid
plant produced from the seed, and variants, mutants, and trivial modifications
of hybrid 33D31. This invention also relates to methods for producing a maize plant
containing in its genetic material one or more transgenes and to the transgenic
maize plants produced by that method. This invention further relates to methods
for producing maize lines derived from hybrid maize line 33D31 and to the lines
derived by the use of those methods.