The invention provides a wheat cell, part, tissue culture or whole plant comprising at least one disrupted KRP gene of the present invention. The present invention also provides methods of increasing weight, size, and/or number of one or more organs, and/or yield of a wheat plant by utilizing the disrupted KRP genes of the present invention. Furthermore, methods of breeding wheat plants to produce new wheat plants having increased weight, size, and/or number of one or more organs, and/or yield are provided. The present invention provides isolated Kinase Inhibitor Protein (KIP) Related Protein (KRP) polynucleotide sequences and isolated KRP polypeptide sequences and methods of their use.
