Patent ID: 7354766

Claim:
A method for improving the plant crossing properties of a transgenic plant by providing a plant with transgene-dependent incompatibility, wherein the method comprises the steps of: (i) introducing a transgene into a plant cell, said transgene comprising a DNA or a vector comprising the DNA, wherein said DNA comprises: (a) a DNA encoding a protein comprising the amino acid sequence of SEQ ID NO: 2; or (b) a DNA comprising the coding region of the nucleotide sequence of SEQ ID NO: 1, (ii) regenerating a transformed plant from the plant cell into which the DNA or the vector is introduced in step (i), (iii) expressing the DNA conferring transgene-dependent incompatibility in said transformed plant of step (ii), and (iv) confirming the transgene-dependent incompatibility of the transformed plant by observing that the transformed plant produces normal seeds when self-pollinated, but fails to reach fruition when pollination occurs through mating with a wild-type strain, thereby effectively preventing the transformed plant from mating with wild-type and native species and spreading recombinant genes into the environment.