Spinach plants that are resistant to downy mildew
The present invention relates to the field of spinach breeding, in particular to a new dominant resistance gene, designated RPF11, which confers resistance against races 7 to 14 of Peronospora farinosa and to spinach plants comprising said gene.
1. A cultivated spinach plant comprising resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158.
2. The plant according to claim 1 , wherein the spinach plant further comprises resistance against Peronospora farinosa races 1, 2, 5 and 6.
3. The plant according to claim 1 , wherein the spinach plant further comprises resistance against isolate UA4712.
4. The plant according to claim 1 , wherein said spinach plant is a hybrid plant.
5. The plant according to claim 1 , wherein said spinach plant is an inbred plant.
6. The plant according to claim 1 , wherein the spinach plant is savoy, semi-savoy, flat- or smooth leaved.
7. A seed from which a plant according to claim 1 can be grown.
8. A leaf of a plant according to claim 1 .
9. A progeny plant of a spinach plant according to claim 1 , wherein said progeny plant retains the resistance gene which confers resistance to Peronospora farinosa races 7-14.
10. The progeny plant according to claim 9 , wherein said progeny plant is resistant to Peronospora farinosa races 1-14 and isolate UA4712.
11. The progeny plant according to claim 9 , wherein the progeny plant is produced by one or more methods of selfing, crossing, mutation, double haploid production or transformation.
12. A method of generating a spinach plant comprising resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, comprising growing a plant from a seed deposited under accession number NCIMB 42158 or a progeny thereof, wherein said progeny comprises the single, dominant resistance gene which confers resistance to Peronospora farinosa races 7-14 gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158.
13. The method of claim 12 wherein the single, dominant resistance gene further confers resistance against Peronospora farinosa races 1, 2, 5 and 6.
14. A part of the spinach plant according to claim 1 , wherein the part is a stem, a cutting, a petiole, a cotyledon, a flower, an anther, a pollen, an ovary, a root, a root tip, a protoplast, a callus, a microspore, a stalk, an ovule, a shoot, a seed, an embryo, an embryo sac, a cell, a meristem, a bud or a leaf.
15. A cell culture or tissue culture comprising a cell or a tissue derived from a part of a spinach plant comprising resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158.
16. A spinach plant regenerated from the cell culture or tissue culture of claim 15 and comprising resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158.
17. A method for generating a spinach plant comprising resistance against Peronospora farinosa races 7-14 comprising:
a) crossing a spinach plant comprising an introgression fragment present in seeds deposited under accession number NCIMB 42158, wherein said introgression fragment confers resistance against Peronospora farinosa races 7-14, which is the resistance gene present in seeds deposited under accession number NCIMB 42158, with another spinach plant, which is susceptible to one or more of Peronospora farinosa races 7-14 to produce F1 seeds;
b) selfing a plant grown from the F1 seeds one or more times to produce F2, F3 or further generation selfing progeny; and
c) identifying spinach plants grown from F1, F2, F3 or further generation selfing progeny which have resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158.
18. A spinach plant obtained by the method of claim 17 , said spinach plant comprising resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158.
19. The seed of claim 7 , wherein a representative sample of the seed has been deposited under accession number NCIMB 42158.
20. The method of claim 17 , further comprising
d) crossing said identified F1, F2, F3 or further generation selfing progeny of step c) to the susceptible spinach plant of step a), to produce a backcross progeny; and
e) selecting a backcross progeny which comprises resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158.
21. A method for generating a spinach plant comprising resistance against Peronospora farinosa races 7-14 comprising:
a) crossing a spinach plant comprising resistance against Peronospora farinosa races 7-14, wherein said resistance is conferred by a single, dominant resistance gene, which is the resistance gene present in seeds deposited under accession number NCIMB 42158 with another spinach plant, which is susceptible to one or more of Peronospora farinosa races 7-14 to produce F1 seeds; and
b) growing said F1 seeds.