Imidazolinone and sulfonyl urea herbicide resistant sugar beet plants
AssigneeBoard of Trustees operating Michigan State University
InventorsDonald Penner, Terry R. Wright
Life of this patent
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Abstract
Sugar beet plants which are resistant to both imidazolinone and sulfonylurea herbicides are described. The sugar beet plants are derived from susceptible cells by sequential selection of SU-R cells, plant regeneration, and re-selection for IM-R. The resistant sugar beet plants derived from the cells can be grown in fields where imidazolinones and sulfonylureas have been used for weed control.
Claims14
A sugar beet plant material consisting of mutated cells with a mutated acetolactate synthase gene encoding the synthase wherein nucleotides are modified from cytosine to thymine at position 562 and guanine to adenine at position 337, wherein the mutated cells have a resistance to both imidazolinone and sulfonylurea herbicides and wherein the resistance is transmitted by conventional cross-breeding of plants produced from the cells and the cells are regenerable to a plant.
A method of producing a herbicide resistance in a sugar beet plant which comprises:
- (a) exposing first cells of the sugar beet to an imidazolinone herbicide with a mutated acetolactate synthase gene encoding the synthase, wherein nucleotides are modified from cytosine to thymine at position 562 and guanine to adenine at position 337 in a culture medium, wherein the first cells have a homozygous trait for resistance sulfonylurea herbicide, in a culture medium;
- and
- (b) selecting for second cells having a resistance to both herbicides, wherein the resistance can be transmitted by cross-breeding of a plant containing the second cells.
A method for imparting a herbicide resistance in a sugar beet which comprises:
- (a) exposing first cells of sugar beet plant to an imidazolinone herbicide in a culture medium, wherein the first cells have a homozygous resistance sulfonylurea herbicide in a culture medium;
- (b) selecting for second cells having a resistance to both herbicides;
- (c) growing a first plant from the second cells, wherein the plant has the resistance to the herbicides with a mutated acetolactate synthase gene encoding the synthase, wherein nucleotides are modified from cytosine to thymine at position 562 and guanine to adenine at position 337;
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- (d) cross-breeding the first plant with a second plant to produce a crossed plant which has the resistance to the herbicides.
A method for imparting herbicide resistance to other beets which comprises:
- (a) exposing first cells of sugar beet plant to an imidazolinone herbicide in a culture medium, wherein the first cells have a homozygous resistance sulfonylurea herbicide in a culture medium;
- (b) selecting for second cells having a resistance to both herbicides;
- (c) growing a first plant from the second cells, wherein the plant has the resistance to the herbicides with a mutated acetolactate synthase gene encoding the synthase, wherein nucleotides are modified from cytosine to thymine at position 562 and guanine to adenine at position 337;
- and
- (d) cross-breeding the first plant with a second plant to produce a crossed plant which has the resistance to the herbicides.
A method for controlling weeds growing with sugar beet plants which comprises:
- (a) planting in a field sugar beet seeds containing cells with a mutated acetolactate synthase gene encoding the synthase wherein nucleotides are modified from cytosine to thymine at position 562 and guanine to adenine at position 337, wherein the mutated cells have a resistance to both imidazolinone and sulfonylurea herbicides and wherein the resistance is transmitted by conventional cross-breeding of plants produced from the cells to produce sugar beet plant;
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- (b) using an imidazolinone herbicide on the plant in the field to control weeds.
Dependencies are inferred from the claim text.