Fertile transgenic corn plants

A fertile transgenic Zea mays plant containing an isolated preselected DNA construct comprising a promoter and encoding a Zea mays seed storage protein under the control or said promoter, wherein the DNA construct is expressed as said seed storage protein so that the level or a seed storage protein amino acid in the seeds of said transgenic plant is substantially increased above the level in the seeds of a Zea mays plant which only differ from the seeds of said transgenic Zea mays plant in that said DNA construct is absent and wherein said DNA construct is transmitted through a complete normal sexual cycle of the transgenic plant to the next generation.