Production method for corn with enhanced quality grain traits

A method for producing corn grain with an enhanced quality grain trait comprising the steps of:

• (a) randomly interplanting in a field:
• (1) corn seed of a high-yielding and agronomically elite hybrid variety to obtain female corn plants wherein said female corn plants have been rendered male sterile by genetic methods;
• and
• (2) corn seed of a heterozygous and heterogeneous variety, enhanced in a quality grain trait selected from the group consisting of quantity of oil, protein, lysine, oleic acid, and amylose, which variety is nonisogenic to and does not exhibit good combining ability with said female corn plants and is capable of serving as a pollinator to produce plants enhanced in said quality grain trait, wherein the ratio of corn seed of said heterozygous and heterogeneous variety enhanced in said quality trait to corn seed of a high yielding and agronomically elite hybrid variety is not greater than one to three;
• (b) permitting said corn plants enhanced in said quality grain trait to pollinate said female corn plants, wherein said quality grain trait is expressed in corn grain on said female corn plants by a xenia effect;
• (c) harvesting the resulting corn grain on all corn plants, thereby obtaining a high yield of corn grain enhanced in said quality grain trait for use as grain.