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Variation in Elymus repens susceptibility to glyphosate
Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, The Institute of Technology. (Conservation Ecology Group)ORCID iD: 0000-0001-6128-1051
2014 (English)In: Acta Agriculturae Scandinavica - Section B, ISSN 0906-4710, E-ISSN 1651-1913, Vol. 64, no 3, 211-219 p.Article in journal (Refereed) Published
Abstract [en]

Continuous increase in glyphosate use in Sweden has caused concern about resistance development, not least inconnection with the possible introduction of crops resistant to glyphosate. In Sweden, the main weed targetedby glyphosate is Elymus repens (L.) Gould. We sampled 69 clones of E. repens to assess the magnitude andgeographical distribution of variation in susceptibility to glyphosate. Clones originated from four habitat types:intensively and extensively used arable lands, field vicinities and other habitats, including natural vegetation.Susceptibility varied greatly among clones with GR50 (50% of untreated growth reduction) spanning over atleast one order of magnitude, 17–278 active ingredient ha−1 in a pot experiment setting. There was a strongcovariance between geographic and genetic distance, but there was no evidence of geographic or geneticdifferentiation in GR50. Nor did GR50 vary consistently between habitat types. We conclude that no indicationof past selection was found towards the resistance to glyphosate in E. repens clones in Sweden. The greatvariability in susceptibility suggests that there might be a potential for such selection.

Place, publisher, year, edition, pages
Taylor & Francis, 2014. Vol. 64, no 3, 211-219 p.
Keyword [en]
Agropyron repens (L.) P. Beauv.; Elytrigia repens (L.) Desv.; herbicide tolerance; herbicide resistance; Sweden
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Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-106663DOI: 10.1080/09064710.2014.901408ISI: 000335848700003OAI: oai:DiVA.org:liu-106663DiVA: diva2:717899
Available from: 2014-05-19 Created: 2014-05-19 Last updated: 2017-12-05Bibliographically approved

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Milberg, Per

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