Corn event MS6 contains a barnase gene derived from Bacillus amyloliquefaciens and a bar gene derived from Streptomyces hygroscopicus. The barnase gene encodes an enzyme that inhibits pollen formation and results in male sterility of the transformed plants. The bar gene encodes a phosphinothricin acetyltransferase (PAT) enzyme that confers tolerance to the herbicide glufosinate. Linkage of the barnase gene, which induces male sterility, with the bar gene, a glufosinate tolerance gene used as a marker, enables selection of the male sterile line independent of plant growth stage. Expression of the added gene sequences is controlled in part by gene sequences derived from the plant pathogens cauliflower mosaic virus and Agrobacterium tumefaciens. While corn event MS6 contains fragments of the bla marker gene, it was concluded that the fragments would not produce an intact protein in any medium. The particle acceleration method was used to transfer the added genes into the parental corn inbred line H99.<br>Corn event MS6 and the antecedent organism were genetically engineered using the same transformation method, with the same gene that makes the plants sterile and the same marker gene, and using the same parental inbred line. Accordingly, we have determined that corn event MS6 is similar to the antecedent organism in petition 95-228-01p and, therefore, should no longer be regulated under the regulations in 7 CFR part 340.