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Multiple Resistance to Acetyl Coenzyme A Carboxylase and Acetolactate Synthase Inhibiting Herbicides in Tunisian Ryegrass Populations (Lolium rigidum)

The good understanding of the mechanisms of resistance to herbicides in weeds is a necessity to implement sustainable weed management strategies. Here, a study was conducted to characterize the molecular bases of resistance to acetyl coenzyme A carboxylase (ACCase) and acetolactate synthase (ALS) in...

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Published in:农业科学与技术:A 2015, Vol.5 (9), p.738-744
Main Author: Haifa Hajri Yosra Menchari Abdelwahed Ghrobel
Format: Article
Language:Chinese
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Summary:The good understanding of the mechanisms of resistance to herbicides in weeds is a necessity to implement sustainable weed management strategies. Here, a study was conducted to characterize the molecular bases of resistance to acetyl coenzyme A carboxylase (ACCase) and acetolactate synthase (ALS) inhibiting herbicides in Lolium rigidum populations from Tunisia. Nine Lolium rigidum (ryegrass) populations collected in wheat fields from Northern Tunisia were investigated for their resistance to two ACCase-inhibiting herbicides and an ALS-inhibiting herbicide. All populations were tested in the greenhouse in pots using the commercial dose to determine resistance status. Survival plants were also tested for the presence of two ACCase (L 1781 and N2041) and two ALS (P197 and W574) mutant resistant alleles using molecular markers. Resistance to ACCase-inhibiting herbicides was found in all tested populations. Comparison of the results from herbicide sensitivity bioassays with genotyping indicated that more than 80%
ISSN:2161-6256