Patent No. 598211 Disclosed is a plant comprising a first polynucleotide encoding a first acetohydroxyacid synthase large subunit (AHASL) polypeptide having a valine, threonine, glutamine, cysteine or methionine substitution at a position corresponding to position 122 of Arabidopsis thaliana AHASL or position 90 of Zea mays acetohydroxyacid synthase large subunit number two (AHASL2) and a phenylalanine, asparagine, threonine, glycine, valine, isoleucine, or tryptophan substitution at a position corresponding to position 653 of AHASL or position 2 of AHASL2 and a second polynucleotide encoding a second AHASL polypeptide having any amino acid substitution at a position corresponding to position 574 of A. thaliana AHASL or position 542 of Z. mays AHASL2.
