Beet necrotic yellow vein virus (bnyvv)-resistance modifying gene

A nucleic acid molecule encoding a polypeptide which is involved in resistance against Beet necrotic yellow vein virus (BNYVV) mediated by the Rz2 resistance gene in a plant in which the polypeptide is expressed, wherein the nucleic acid molecule comprises a nucleotide sequence which is selected from the group consisting of:

• (a) a nucleotide sequence that encodes a polypeptide having the amino acid sequence according to SEQ ID No. 45;
• (b) a nucleotide sequence that comprises the coding DNA sequence according to SEQ ID No. 44
• (c) a nucleotide sequence that hybridizes with a complementary sequence of the nucleotide sequence according to (a) or (b) under stringent conditions;
• (d) a nucleotide sequence that encodes a polypeptide which, via substitution, deletion, and/or addition of one or more amino acids of the amino acid sequence, differs from a polypeptide that is encoded by the nucleotide sequence according to (a) or (b);
• (e) a nucleotide sequence that encodes a polypeptide which has an amino acid sequence that is at least 70% identical to the amino acid sequence according to SEQ ID No. 45;
• and
• (f) a nucleotide sequence that comprises the coding DNA sequence which is at least 70% identical to the DNA sequence according to SEQ ID No. 44,
• wherein the amino acid sequence of the encoded polypeptide has a proline (P) at position 25 with reference to SEQ ID No. 45, a proline (P) at position 72 with reference to SEQ ID No. 45 or a valine (V) at position 186 with reference to SEQ ID No. 45, or
• wherein the nucleic acid of the coding DNA sequence has a cytosine (c) at position 73 with reference to SEQ ID No. 44, a cytosine (c) at position 214 with reference to SEQ ID No. 44, or a guanine (g) at position 556 with reference to SEQ ID No. 44, preferably
• wherein the polypeptide has the amino acid sequence of SEQ ID No. 8, 12, 16, or 20, or the nucleotide sequence that encodes said polypeptide is SEQ ID No. 5, 6, 7, 9, 10, 11, 13, 14, 15, 17, 18 or 19, or the coding DNA sequence is a nucleotide sequence according to SEQ ID No. 7, 11, 15, or 19.