Sulfonylurea herbicide resistance in plants

Abstract

Plants, plant tissues and plant seeds which are resistant to inhibition by sulfonylurea and/or imidazolinone herbicides are provided. In particular, domestic lettuce varieties having resistance to herbicides which target the enzyme acetolactate synthase are provided. The resistant plants find use in areas where weed growth is controlled by sulfonylurea and/or imidazolinone herbicides.

What is claimed is: 
     
       1. . .A.!. .Iadd.An herbicide resistant .Iaddend.Lactuca . .sativa.!. plant selected from the group consisting of (1) a plant . .retardant.!. .Iadd.resistant .Iaddend.to sulfonylurea herbicides, (2) a plant resistant to imidazolinone herbicides, and (3) .Iadd.sulfonylurea or imidazolinone herbicide resistant .Iaddend.progeny plants of either of plant (1) or plant (2). .;.!. wherein said plant or . .a parent.!. .Iadd.an ancestor .Iaddend.of said plant was grown from seed obtained by crossbreeding a Lactuca serriola plant resistant to an herbicide selected from the group consisting of (1) sulfonylurea herbicides and (2) imidazolinone herbicides, with a Lactuca sativa plant. 
     
     
       2. The .Iadd.herbicide resistant Lactuca .Iaddend.plant according to claim 1, wherein said Lactuca sativa plant is of the variety Bibb, Grand Rapids, Prizehead, Vanguard, Ithaca, Empire or Salinas. 
     
     
       3. A seed of . .a.!. .Iadd.an herbicide resistant .Iaddend.Lactuca . .sativa.!. plant, said seed obtained from a plant selected from the group consisting of (1) . .a.!. .Iadd.an herbicide resistant .Iaddend.plant according to claim 1 and (2) progeny of . .a.!. .Iadd.an herbicide resistant .Iaddend.plant according to claim 1. 
     
     
       4. The seed according to claim 3, wherein said Lactuca sativa plant is of the variety Bibb, Grand Rapids, Prizehead, Vanguard, Ithaca, Empire or Salinas. 
     
     
       5. A plant cell of . .a.!. .Iadd.an herbicide resistant .Iaddend.Lactuca . .sativa.!. plant and progeny cells of said . .cells.!. .Iadd.plant cell.Iaddend., said plant cell obtained from a plant selected from the group consisting of (1) . .a.!. .Iadd.an herbicide resistant Lactuca .Iaddend.plant according to claim 1 and (2) progeny of . .a.!. .Iadd.an herbicide resistant Lactuca .Iaddend.plant according to claim 1. 
     
     
       6. The plant cell according to claim 5, wherein said Lactuca sativa is of the variety Bibb, Grand Rapids, Prizehead, Vanguard, Ithaca, Empire or Salinas. 
     
     
       7. A plant comprising cells according to claim 5, and progeny plants derived from said plant. 
     
     
       8. Seeds from . .a.!. .Iadd.an herbicide resistant Lactuca .Iaddend.plant according to claim . .2.!. .Iadd.1. .Iaddend.