Herbicid resistant rice

A herbicide and resistance technology, applied in the field of imidazolinone herbicide and sulfonylurea herbicide resistant rice, can solve the problem of no given strain

Inactive Publication Date: 2002-01-09
BOARD OF SUPERVISORS OF LOUISIANA STATE UNIV & AGRI & MECHANICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

Experimental program
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Effect test

Embodiment 1-15

[0034] Approximately 52 million mutant (M 2 ) rice seeds. By adding a total of 340 pounds of rice cultivar "Cypress" or "Bengal" seed (M 1 ) soaked in 0.175% (by weight) EMS aqueous solution to develop mutant seeds. About 170 lbs of rice seeds were exposed to EMS for 16 hours; about 85 lbs for 24 hours; and about 85 lbs for 35 hours. Seeds from the three exposure regimes were collected for the screening experiments described below.

[0035] After EMS treatment, rinse the M thoroughly with water 1 Seeds, drained before sowing in shallow water by broadcast, and drained after 24 hours. Three days later, the farmland was flooded again, and the farmland was kept flooded until it was drained for harvesting. Harvest M 2 Seeds are stored for the winter and screened for herbicide resistance the following year. Punch and sow about 52 million grains of M 2 After seeding, imazethapyr was applied at a rate of 0.125 lb ai / A (pounds of active ingredient per acre) prior to seed emerge...

Embodiment 16-27

[0043] There are about 60 million additional mutant M 2 Rice seeds are screened. By adding a total of 300 pounds of seeds of the rice cultivar °Cypress (M 1 ) soaked in 0.175% (by weight) mutagen EMS aqueous solution for 23 hours to produce mutant seeds.

[0044] After EMS treatment, rinse the M thoroughly with water 1 Seeds, drained before planting in shallow water by sowing, and drained after 24 hours in shallow water. Three days later, the farmland was flooded again, and the farmland was kept flooded until it was drained for harvesting. Harvest M 2 The seeds are stored for the winter and screened for herbicide resistance in the spring of the following year. About 600 million grains of M are sown by sowing and shallow soil mixing 2 After seeding, half the field was sprayed with imazapic (trade name Cardre TM ), implement pre-emergent application, implement imazapyr (trade name Arsenal TM ) post-emergence application. 23 M. surviving after herbicide application were ...

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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.

Description

[0001] Priority to U.S. Provisional Application Serial No. 60 / 107,255, filed November 5, 1998, is claimed within and outside the United States, respectively, pursuant to 35 U.S.C. § 119(e) and applicable treaties and conventions. technical field [0002] The present invention relates to herbicide-resistant rice, and in particular to herbicide-resistant rice that normally interferes with plant acetohydroxyacid synthase (AHAS), such as imidazolinone herbicides and sulfonylurea herbicides. Background technique [0003] Developing novel herbicide resistance in plants offers significant production and economic advantages. Rice production is often limited by the dominance of a closely related weed that thrives in commercial rice fields. The weed is commonly referred to as "red rice: belongs to the same genus (Oryza sariva L.) as cultivated rice. Genetic similarities between red rice and commercial rice make herbicidal control of red ...

Claims

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Application Information

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IPC IPC(8): A01H5/10C12N15/09
CPCA01H5/10A01H6/4636A01H1/06A01H1/04A01N43/40
Inventor T·P·克汝罕
Owner BOARD OF SUPERVISORS OF LOUISIANA STATE UNIV & AGRI & MECHANICAL COLLEGE
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