The invention overcomes the deficiencies of the art by providing a soybean plant with non-transgenic mutations conferring decreased α-subunit of β- conglycinin content and increased α' -subunit content of β- conglycinin in seed. Moreover, the invention provides an agronomically elite soybean plant with non-transgenic mutations conferring a gyclinin null phenotype, increased β- conglycinin content, and increased α' -subunit content of β- conglycinin in the seed. The invention also provides derivatives, and plant parts of these plants and uses thereof. Methods for producing such plants are also provided.
