Theoretical and Applied Genetics

, Volume 102, Issue 4, pp 545–550

Inheritance of evolved glyphosate resistance in Lolium rigidum (Gaud.)

  • D. F. Lorraine-Colwill
  • S. B. Powles
  • T. R. Hawkes
  • C. Preston
Original Article

DOI: 10.1007/s001220051680

Cite this article as:
Lorraine-Colwill, D., Powles, S., Hawkes, T. et al. Theor Appl Genet (2001) 102: 545. doi:10.1007/s001220051680


Resistance to the non-selective herbicide, glyphosate, has evolved recently in several populations of Lolium rigidum (Gaud.). Based upon the observed pattern of inheritance, glyphosate resistant and susceptible populations are most probably homozygous for glyphosate resistance and susceptibility, respectively. When these populations were crossed and the F1 progeny treated with glyphosate, the dose response behavior was intermediate to that of the parental populations. This observation, coupled with an absence of a difference between reciprocal F1 populations, suggests that glyphosate resistance is inherited as an incompletely dominant nuclear-encoded trait. The segregation of resistance in F1×S backcrosses suggests that the major part of the observed resistance is conferred by a single gene, although at low glyphosate treatments other genes may also contribute to plant survival. It appears from this study that a single nuclear gene confers resistance to glyphosate in one population of L. rigidum.

Keywords Glyphosate Herbicide resistance Genetics Lolium rigidum 

Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • D. F. Lorraine-Colwill
    • 1
  • S. B. Powles
    • 2
  • T. R. Hawkes
    • 3
  • C. Preston
    • 4
  1. 1.Department of Applied and Molecular Ecology, Waite Campus, University of Adelaide, PMB 1 Glen Osmond SA 5064, Australia e-mail:
  2. 2.WA Herbicide Resistance Initiative, Faculty of Agriculture, University of Western Australia, Nedlands WA 6907, AustraliaAU
  3. 3.Zeneca Agrochemicals, Jealott’s Hill, Bracknell, Berkshire RG42 6ET, UKGB
  4. 4.Cooperative Research Centre for Weed Management Systems and Department of Applied and Molecular Ecology, Waite Campus, University of Adelaide, PMB 1 Glen Osmond SA 5064, AustraliaAU

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