Manipulation of self-incompatibility in plants

A kit for hybridization or self-incompatibility (SI) control in plants, said kit including:

• a first nucleic acid or nucleic acid fragment included in a vector encoding a SI polypeptide, wherein said first nucleic acid or nucleic acid fragment is isolated from or corresponds to a gene from the Z locus of a plant of the genera Lolium or Festuca of the Poaceae family;
• and
• a second nucleic acid or nucleic acid fragment included in a vector encoding a SI polypeptide, wherein said second nucleic acid or nucleic acid fragment is isolated from or corresponds to a gene from the S locus of a plant of the genera Lolium or Festuca of the Poaceae family;
• wherein said first nucleic acids or nucleic acid fragment includes a nucleotide sequence selected from the group consisting of:
• (a) the nucleotide sequence of SEQ ID NO:
• 39;
• (b) a nucleotide sequence encoding the polypeptide of SEQ ID NO:
• 109;
• (c) complements of the sequences recited in (a) and (b);
• (d) sequences antisense to the sequences recited in (a) and (b);
• (e) functionally active fragments of the sequences recited in (a), (b), (c) and (d);
• having a size of at least 100 nucleotides and
• (f) functionally active variants having at least 90% identity to any one of the sequences recited in (a), (b), (c), (d) and (e);
• wherein said second nucleic acids or nucleic acid fragments includes a nucleotide sequence selected from the group consisting of:
• (a) the nucleotide sequence of SEQ ID NO:
• 59;
• (b) a nucleotide sequence encoding the polypeptide of SEQ ID NO:
• 129;
• (c) complements of the sequences recited in (a) and (b);
• (d) sequences antisense to the sequences recited in (a) and (b);
• (e) functionally active fragments of the sequences recited in (a), (b), (c) and (d) having a size of at least 100 nucleotides;
• and
• (f) functionally active variants having at least 90% identity to any one of the sequences recited in (a), (b), (c), (d) and (e).