Evolution of herbicide resistance in weeds: initial frequency of target site-based resistance to acetolactate synthase-inhibiting herbicides in Lolium rigidum

Preston, Christopher; Powles, Stephen B.

doi:10.1038/sj.hdy.6800004

Cited by 127 publications

(121 citation statements)

References 15 publications

(22 reference statements)

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“…Several factors modify the rate of evolution of herbicide resistance in a region; however the most important factors controlling this phenomenon are the intensity of herbicide use and the initial frequency of the herbicide resistant gene (Maxwell & Mortlmer, 1994;Winkler et al, 2002). The initial frequency of ALS-resistant cells in Nicotiana tabacum cell culture was 10 -8 (Harms & Dimaio, 1991) and in Gossipium hirsutum cell culture was 10 -7 (Rajasekaran et al, 1996), implying that in a few generations of the constant use of an ALS-inhibiting resistant biotypes would dominate a weed community (Maxwell & Mortlmer, 1994). However, recent research indicates that in Lolium rigidum populations never sprayed with ALS-inhibiting herbicides, the initial frequency of individuals resistant to this group of herbicides can be as high as 10 -4 (Preston & Powles, 2002), explaining the appearance of resistant biotypes with only 3 years of constant use of herbicides from this group (Powles et al, 1997).…”

Section: Resultsmentioning

confidence: 99%

A field survey of crop management practices and distribution of ALS resistant Euphorbia heterophylla in two states in southern Brazil

Vidal

Winkler²,

Hernandes

et al. 2004

Planta daninha

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Section: Resultsmentioning

confidence: 99%

A field survey of crop management practices and distribution of ALS resistant Euphorbia heterophylla in two states in southern Brazil

Vidal

Winkler²,

Hernandes

et al. 2004

Planta daninha

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“…The reason is the high initial frequency reached by the adaptive allele before the environmental change. In weed populations, initial frequency of herbicide resistance allele in unexposed populations also depends on the fitness cost and its associated dominance (Preston and Powles, 2002).…”

Section: Introductionmentioning

confidence: 99%

The effects of the genetic background on herbicide resistance fitness cost and its associated dominance in Arabidopsis thaliana

et al. 2008

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The advantage of the resistance conferred by a mutation can sometimes be offset by a high fitness-cost penalty. This balance will affect possible fate of the resistance allele. Few studies have explored the impact of the genetic background on the expression of the resistance fitness cost and none has attempted to measure the variation in fitnesscost dominance. However, both the fitness penalty and its dominance may modify evolutionary trajectory and outcome. Here the impact of Arabidopsis thaliana intraspecific genetic diversity on fitness cost and its associated dominance was investigated by analysing 12 quantitative traits in crosses between a mutant conferring resistance to the herbicide 2,4-D and nine different natural genetic backgrounds. Fitness cost values were found to be more affected by intraspecific genetic diversity than fitness cost dominance, even though this effect depends on the quantitative trait measured. This observation has implications for the choice of the best strategy for preventing herbicide resistance development. In addition, our results pinpoint a potential compensatory improvement of the resistance fitness cost and its associated dominance by the genetic diversity locally present within a species.

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“…Herbicide selection of large populations of initially herbicidesusceptible plant species selects for the rare individuals expressing resistance genes (reviewed by Jasieniuk et al, 1996). Therefore, it is generally accepted that the dynamics of herbicide resistance evolution are strongly influenced by the initial frequency of major resistance genes in weed populations under herbicide selection (Preston and Powles, 2002). However, a potential concomitant evolutionary path to herbicide resistance in weed populations under selection could be the recurrent enrichment of several additive minor genes, which, in combination, endow sufficient resistance for a substantial number of individuals to survive at the recommended (label) herbicide use rates (Neve and Powles, 2005b).…”

Section: Introductionmentioning

confidence: 99%

Evolution of glyphosate resistance in a Lolium rigidum population by glyphosate selection at sublethal doses

2009

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The majority of the documented cases of field-evolved herbicide-resistant weed biotypes established that single major genes confer glyphosate resistance. However, the contribution of minor genes endowing substantial plant survival at sublethal herbicide doses may be a potential complementary path to herbicide resistance evolution in weed populations under selection. Here, we subjected a number of susceptible individuals of Lolium rigidum to recurrent glyphosate selection to test the potential for sublethal glyphosate doses to additively select for glyphosate resistance. After 3-4 cycles of glyphosate selection in two distinct environments, the progenies of the initially susceptible population were shifted toward glyphosate resistance. The results indicate progressive enrichment of minor gene trait(s) contributing toward plant survival in the glyphosate-selected progenies. After three generations of selection, the estimated LD 50 values were doubled compared with the original population and up to 33% plant survival was obtained in the glyphosate-selected progeny at the recommended glyphosate label rate. This level of resistance probably was the maximum shift achievable with sublethal glyphosate dose selection in this small population. Cross-pollination was a crucial factor enabling the rapid rate of accumulation of minor glyphosate resistance gene trait(s) that are likely to be present at a relatively high frequency in a small susceptible population. The mechanistic basis of the moderate glyphosate resistance level selected by sublethal glyphosate doses remains unknown and warrants future research. Studying the main factors influencing the evolution of resistant weed populations is crucial for understanding, predicting and managing herbicide resistance.

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Evolution of herbicide resistance in weeds: initial frequency of target site-based resistance to acetolactate synthase-inhibiting herbicides in Lolium rigidum

Cited by 127 publications

References 15 publications

A field survey of crop management practices and distribution of ALS resistant Euphorbia heterophylla in two states in southern Brazil

A field survey of crop management practices and distribution of ALS resistant Euphorbia heterophylla in two states in southern Brazil

The effects of the genetic background on herbicide resistance fitness cost and its associated dominance in Arabidopsis thaliana

Evolution of glyphosate resistance in a Lolium rigidum population by glyphosate selection at sublethal doses

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