chimaeric gene (coding sequence of the barnase gene) seq ID No:3 Sequence 3 from Patent EP0955371. Sequence 8 from Patent WO0164926. Sequence 3 from patent US 6002070. Sequence 3 from patent US 6074877. Sequence 8 from patent US 6743968. Sequence 3 from patent US 5641664. Sequence 3 from patent US 5712135. Methods and Compositions to Reduce or Eliminate Transmission of aTransgene. Methods and Compositions to Reduce or Eliminate Transmission of a Transgene.