Back to results
US 7,754,947 B2Granted
Herbicide resistant rice
AssigneeBoard of Supervisors of Louisiana State University and Agricultural and Mechanical College
InventorTimothy P. Croughan
Life of this patent
Estimating the term…
Abstract
Rice plants are disclosed with multiple sources of resistance to herbicides that normally inhibit a plant's acetohydroxyacid synthase (AHAS) enzyme. Besides controlling red rice, many AHAS-inhibiting herbicides also effectively control other weeds that are common in rice fields. Several of these herbicides have residual activity, so that one treatment can control both existing weeds and weeds that sprout later. With effective residual activity against red rice and other weeds, rice producers now have a weed control system superior to those that are currently available commercially.
Claims34
A herbicide-resistant hybrid rice plant produced by the process of:
- (a) crossing or back-crossing a first rice plant with other rice germplasm;
- (b) growing rice plants resulting from said crossing or back-crossing in the presence of at least one herbicidally-effective imidazolinone at levels of the imidazolinone herbicide that would normally inhibit the growth of a rice plant;
- and
- (c) selecting for further propagation hybrid rice plants resulting from said crossing or back-crossing, wherein the hybrid rice plants selected are plants that grow without significant injury in the presence of the imidazolinone herbicide;
- wherein:
- (d) the first rice plant is selected from the group consisting of the rice plants having ATCC accession numbers PTA-905, PTA-902, PTA-903, PTA-906, PTA-907, PTA-908, 203419, 203420, 203421, 203422, 203423, 203424, 203425, 203426, 203427, 203428, 203429, 203430, 203431, 203432, and 203433;
- and
- (e) said herbicide-resistant hybrid rice plant exhibits the same phenotype of resistance and sensitivity towards imidazolinone herbicides and sulfonylurea herbicides as the phenotype exhibited by the first rice plant, as exemplified by Tables 2, 3, and 4 of the Specification.
5 more elements
A process for breeding herbicide resistant hybrid rice plants, said process comprising the steps of:
- (a) crossing or back-crossing a first rice plant with other rice germplasm;
- (b) growing rice plants resulting from said crossing or back-crossing in the presence of at least one herbicidally-effective imidazolinone, at levels of the imidazolinone herbicide that would normally inhibit the growth of a rice plant;
- and
- (c) selecting for further propagation hybrid rice plants resulting from said crossing or back-crossing, wherein the hybrid rice plants selected are plants that grow without significant injury in the presence of the imidazolinone herbicide;
- wherein:
- (d) the first rice plant is selected from the group consisting of the rice plants having ATCC accession numbers PTA-905, PTA-902, PTA-903, PTA-906, PTA-907, PTA-908, 203419, 203420, 203421, 203422, 203423, 203424, 203425, 203426, 203427, 203428, 203429, 203430, 203431, 203432, and 203433;
- and
- (e) the herbicide-resistant hybrid rice plants exhibit the same phenotype of resistance and sensitivity towards imidazolinone herbicides and sulfonylurea herbicides as the phenotype exhibited by the first rice plant, as exemplified by Tables 2, 3, and 4 of the Specification.
5 more elements
A herbicide-resistant varietal rice plant produced by the process of:
- (a) crossing or back-crossing a first rice plant with other rice germplasm;
- (b) growing rice plants resulting from said crossing or back-crossing in the presence of at least one herbicidally-effective imidazolinone at levels of the imidazolinone herbicide that would normally inhibit the growth of a rice plant;
- and
- (c) selecting for further propagation varietal rice plants resulting from said crossing or back-crossing, wherein the varietal rice plants selected are plants that grow without significant injury in the presence of the imidazolinone herbicide;
- wherein:
- (d) the first rice plant is selected from the group consisting of the rice plants having ATCC accession numbers PTA-905, PTA-902, PTA-903, PTA-906, PTA-907, PTA-908, 203419, 203420, 203421, 203422, 203423, 203424, 203425, 203426, 203427, 203428, 203429, 203430, 203431, 203432, and 203433;
- and
- (e) said herbicide-resistant varietal rice plant exhibits the same phenotype of resistance and sensitivity towards imidazolinone herbicides and sulfonylurea herbicides as the phenotype exhibited by the first rice plant, as exemplified by Tables 2, 3, and 4 of the Specification.
5 more elements
A process for breeding herbicide resistant varietal rice plants, said process comprising the steps of:
- (a) crossing or back-crossing a first rice plant with other rice germplasm;
- (b) growing rice plants resulting from said crossing or back-crossing in the presence of at least one herbicidally-effective imidazolinone, at levels of the imidazolinone herbicide that would normally inhibit the growth of a rice plant;
- and
- (c) selecting for further propagation varietal rice plants resulting from said crossing or back-crossing, wherein the varietal rice plants selected are plants that grow without significant injury in the presence of the imidazolinone herbicide;
- wherein:
- (d) the first rice plant is selected from the group consisting of the rice plants having ATCC accession numbers PTA-905, PTA-902, PTA-903, PTA-906, PTA-907, PTA-908, 203419, 203420, 203421, 203422, 203423, 203424, 203425, 203426, 203427, 203428, 203429, 203430, 203431, 203432, and 203433;
- and
- (e) the herbicide-resistant varietal rice plants exhibit the same phenotype of resistance and sensitivity towards imidazolinone herbicides and sulfonylurea herbicides as the phenotype exhibited by the first rice plant, as exemplified by Tables 2, 3, and 4 of the Specification.
5 more elements
Dependencies are inferred from the claim text.