Geographical variation in resistance to acetyl-coenzyme A carboxylase-inhibiting herbicides across the range of the arable weed Alopecurus myosuroides (black-grass)

Christophe Délye 1 Séverine Michel 1 Aurélie Berard 2 Bruno Chauvel 1 Dominique Brunel 2 Jean-Philippe Guillemin 1 Fabrice Dessaint 1 Valerie Le Corre 1
1 BGA - Biologie et Gestion des Adventices
2 UR1279, Unité Etude du Polymorphisme des Génomes Végétaux, CEA-Institut de Génomique-CNG
Abstract : The geographical structure of resistance to herbicides inhibiting acetyl-coenzyme A carboxylase (ACCase) was investigated in the weed Alopecurus myosuroides (black-grass) across its geographical range to gain insight into the process of plant adaptation in response to anthropogenic selective pressures occurring in agricultural ecosystems. *We analysed 297 populations distributed across six countries in A. myosuroides' main area of occupancy. The frequencies of plants resistant to two broadly used ACCase inhibitors and of seven mutant, resistant ACCase alleles were assessed using bioassays and genotyping, respectively. *Most of the resistance was not endowed by mutant ACCase alleles. Resistance and ACCase allele distribution patterns were characterized by mosaicism. The prevalence of resistance and of ACCase alleles differed among countries. *Resistance clearly evolved by redundant evolution of a set of resistance alleles or genes, most of which remain unidentified. Resistance in A. myosuroides was shaped by variation in the herbicide selective pressure at both the individual field level and the national level.
Keywords : acetyl-coenzyme A carboxylase (ACCase) adaptation Agricultural ecosystems Alopecurus myosuroides (black-grass) anthropogenic selective pressure herbicide redundant evolution
Document type :
Journal articles
Complete list of metadatas
https://hal-agrosup-dijon.archives-ouvertes.fr/hal-01785449
Contributor : Administrateur Agrosupdijon <>
Submitted on : Friday, May 4, 2018 - 1:48:04 PM
Last modification on : Monday, September 23, 2019 - 3:20:06 PM

Identifiers

Collections

AGROSUP-DIJON | ENESAD | INRA | UNIV-BOURGOGNE | CEA

Citation

Christophe Délye, Séverine Michel, Aurélie Berard, Bruno Chauvel, Dominique Brunel, et al.. Geographical variation in resistance to acetyl-coenzyme A carboxylase-inhibiting herbicides across the range of the arable weed Alopecurus myosuroides (black-grass). New Phytologist, Wiley, 2010, 186 (4), pp. 1005 - 1017. ⟨10.1111/j.1469-8137.2010.03233.x⟩. ⟨hal-01785449⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

85

Contact

CCSD