Dominant mutations causing alterations in acetyl-coenzyme A carboxylase confer tolerance to cyclohexanedione and aryloxyphenoxypropionate herbicides in maize.

ABSTRACT: A partially dominant mutation exhibiting increased tolerance to cyclohexanedione and aryloxyphenoxypropionate herbicides was isolated by exposing susceptible maize (Zea mays) tissue cultures to increasingly inhibitory concentrations of sethoxydim (a cyclohexanedione). The selected tissue culture (S2) was greater than 40-fold more tolerant to sethoxydim and 20-fold more tolerant to haloxyfop (an aryloxyphenoxypropionate) than the nonselected wild-type tissue culture. Regenerated S2 plants were heterozygous for the mutant allele and exhibited a high-level, but not complete, tolerance to both herbicides. Homozygous mutant families derived by self-pollinating the regenerated S2 plants exhibited no injury after treatment with 0.8 kg of sethoxydim per ha, which was greater than 16-fold the rate

SUBMITTER: Parker WB 

PROVIDER: S-EPMC54706 | biostudies-literature | 1990 Sep

REPOSITORIES: biostudies-literature