Full TGIF Record # 107850
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Web URL(s):http://www.bioone.org/doi/pdf/10.1614/WS-04-187R.1
    Last checked: 03/16/2010
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Publication Type:
i
Refereed
Author(s):Simarmata, Marulak; Bughrara, Suleiman; Penner, Donald
Author Affiliation:Simarmata & Bughrara: Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan; and Penner: Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan
Title:Inheritance of glyphosate resistance in rigid ryegrass (Lolium rigidum) from California
Section:Weed biology and ecology
Other records with the "Weed biology and ecology" Section
Source:Weed Science. Vol. 53, No. 5, September/October 2005, p. 615-619.
Publishing Information:Champaign, IL: Weed Science Society of America
# of Pages:5
Keywords:TIC Keywords: Glyphosate; Inheritance; Breeding; Lolium rigidum; Genotypes; Clones; Resistance; Herbicide resistance; Pollen
Geographic Terms:California
Abstract/Contents:"Glysophate resistance was found in a rigid ryegrass population in northern California. A sample of the resistant plants were collected and grown under greenhouse conditions. The objective of this study was to evaluate glyphosate resistance in the progeny of the collected plants by recurrent selection, obtain the homozygous resistant and sensitive lines to establish dose-response curves, and to determine the inheritance of glyphosate resistance in rigid ryegrass. Diverse levels of resistance were observed in the first generation with survival of 89, 59, 45, and 9% from glyphosate at 1x, 2x, 4x, and 8x respectively, where x = 1.12 kg ha-1 isopropylamine salt of glyphosate. Clones of plants that died from 1x were allowed to produce seed and were further subjected to recurrent selection to generate the most sensitive plants (S lines), which died from 0.125x glyphosate. The most resistant plants (R lines) were generated from the survivors recieving 8x glyphosate. The ratio between I50 rates for the glyphosate resistant and the glysophate sensitive plants was > 100-fold. The R and S lines were crossed reciprocally and F1 progeny of both (R x S) and (S x R) showed intermediate resistance. These survived up to 2x glyphosate. The F2 progeny were generated by intercrossing of F1 plants. The ratio of sensitive, intermediate, and resistant plants in the F2 population before the treatment of glyphosate at 0.125x followed by 8x was 1 : 16, 14 : 16, 1 : 16 respectively; which corresponded to the Mendelian segregation ratio of two genes. The results indicated that the inheritance of glyphosate resistance in rigid ryegrass from California appeared to be nuclear, incompletely dominant, multigenic, and pollen-transmitted with no indication of maternal inheritance."
Language:English
References:26
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Simarmata, Marulak, S. Bughrara, and D. Penner. 2005. Inheritance of glyphosate resistance in rigid ryegrass (Lolium rigidum) from California. Weed Sci. 53(5):p. 615-619.
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Web URL(s):
http://www.bioone.org/doi/pdf/10.1614/WS-04-187R.1
    Last checked: 03/16/2010
    Requires: PDF Reader
    Access conditions: Item is within a limited access website
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MSU catalog number: SB 610 .W38
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