Patent ID: 6414222
Filing Date: 2002-07-02
Classification: C12N

Abstract:
A method to identify a plant which is a double heterozygote for a herbicide-tolerant allele of Acc1 and Acc2, the tolerance of which is at least twice that of a plant which is a single heterozygote for a herbicide-tolerant allele of Acc1 or Acc2 comprising: (a) crossing a first corn plant with a second corn plant so an to yield a progeny plant, wherein the fist plant is homozygous for an allele of Acc1 which imparts cyclohexanedione or aryloxyphenoxypropanoic acid herbicide tolerance, wherein the second plant is homozygous for an allele of Acc2 which imparts cyclohexanedione or aryloxyphenoxypropanoic acid herbicide tolerance, wherein the progeny plant is heterozygous as for the Acc1 allele which imparts cyclohexanodione or aryloxyphenoxypropanoic acid herbicide tolerance and heterozygous for the Acc2 allele which imparts cyclohexanedione or aryloxyphenoxypropanoic acid herbicide tolerance; and (b) identifying a progeny plant the tolerance of which is at least twice that of a corresponding corn plant that is heterozygous for the herbicide-tolerant allele of Acc1 or of a corresponding corn plant that is heterozygous for the herbicide-tolerant allele of Acc2.