Patent ID: 6025546
Filing Date: 2000-02-15
Classification: C12N

Abstract:
A plant having in the nuclear genome of its cells a foreign DNA comprising:a male-sterility gene comprising:a male sterility DNA encoding a ribonuclease; anda sterility promoter directing expression of said male-sterility DNA selectively in specific stamen cells of said plant, said male-sterility DNA being in the same transcriptional unit as, and under the control of, said sterility promoter; anda coregulating gene comprising:a coregulating DNA encoding a ribonuclease inhibitor which is capable of neutralizing, blocking, preventing or inhibiting the activity of said ribonuclease; anda coregulating promoter which is selected from the group consisting of: a promoter directing expression of said coregulating DNA in non-stamen cells of said plant, while directing low-level expression in said specific stamen cells; and a promoter comprising a minimal promoter element;wherein said coregulating DNA is in the same transcriptional unit as, and under the control of, said coregulating promoter;wherein said coregulating DNA is in a transcriptional unit which is different from the transcriptional unit of said sterility DNA and wherein said plant is male-sterile.