Herbicide resistant sunflower plants derived from RW-B cultivar
View Patent ↗Seeds and sunflower plants derived from cultivar RW-B and having increased resistance to herbicides relative to wild-type plants are provided. These plants contain a new genetic mutation in the AHAS gene which confers broad spectrum resistance to a combination of an imidazolinone, a sulfonylurea, a triazolopyrimidine, and a pyrimidinyloxybenzoate herbicide and mixtures thereof, including (i) resistance to cloransulam-methyl present in a concentration of at least 67 grams of active ingredient per hectare; and (ii) resistance to the mix of imazapyr present in a concentration of at least 160 grams per hectare and metsulfuron present in a concentration of at least 10 grams per hectare. RW-B is true breeding for the morphological traits of producing a plant with a single head, a yield of greater than one tonne per hectare and for producing a seed having an oil content of greater than 40%.
1. A seed of sunflower cultivar designated RW-B, a representative seed of said sunflower cultivar was deposited under ATCC Accession No: PTA-9176.
2. A sunflower plant, or a part thereof, produced by growing the seed of claim 1 .
3. Pollen of the plant of claim 2 .
4. An ovule of the plant of claim 2 .
5. A sunflower plant, or part thereof, having all the characteristics of the plant according to claim 2 .
6. A seed of the plant of claim 5 .
7. A tissue culture of regenerable cells of the sunflower plant according to claim 2 .
8. The tissue culture according to claim 7 , wherein the cells of the tissue culture comprise a leaf, pollen, an embryo, a cotyledon, a hypocotyl, meristematic cells, a root, a root tip, an anther, a flower, a seed, a stem, ovules, shoots, stems, stalks, pith capsules or a pod.
9. A sunflower plant generated from the tissue culture of claim 8 , wherein the regenerated plant expresses all the morphological and physiological characteristics of sunflower cultivar RW B.
10. A method for producing a sunflower seed, comprising
crossing a first parent sunflower plant with a second parent sunflower plant, and
harvesting the resultant first generation sunflower seed, wherein the first or second parent sunflower plant is a sunflower plant selected from the group consisting of the sunflower plant of claim 2 and claim 5 , and a sunflower plant derived from the sunflower plant of claim 2 or 5 ; and
determining whether the seed produces a plant expresses all the morphological and- physiological characteristics of sunflower cultivar RW-B.
11. A method for producing a RW-B-derived sunflower plant, comprising:
crossing the sunflower line RW-B, representative seed of the sunflower cultivar RW-B having been deposited under ATCC Accession No. PTA-9176, with a second sunflower plant to yield a progeny sunflower seed;
growing the progeny sunflower seed to yield the RW-B-derived sunflower plant and;
determining whether the progeny sunflower seed produces a plant expressing all the morphological and physiological characteristics of sunflower cultivar RW-B.
12. A tissue culture of regenerable cells of the sunflower plant according to claim 5 .
13. The tissue culture according to claim 12 , wherein the cells of the tissue culture are from a leaf, pollen, an embryo, a cotyledon, a hypocotyl, meristematic cells, a root, a root tip, an anther, a flower, a seed, a stem, ovules, shoots, stems, stalks, pith capsules or a pod.
14. A sunflower plant generated from the tissue culture of claim 12 , wherein the sunflower plant expresses all the morphological and physiological characteristics of sunflower cultivar RW-B.
15. A sunflower plant obtained from a seed produced by the method of claim 10 , wherein the sunflower plant expresses all the morphological and physiological characteristics of sunflower cultivar RW-B.
16. A sunflower plant seed obtained from a plant produced by the method of claim 11 , wherein the sunflower plant expresses all the morphological and- physiological characteristics of sunflower cultivar RW-B.