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- Title
A LuALS Mutation with High Sulfonylurea Herbicide Resistance in Linum usitatissimum L.
- Authors
Liu, Caiyue; Zhang, Tianbao; Yang, Xinsen; Wang, Liu; Long, Yan; Hasi, Agula; Pei, Xinwu
- Abstract
The cultivation of herbicide-resistant crops is an effective tool for weed management in agriculture. Weed control in flax (Linum usitatissimum L.) remains challenging due to the lack of available herbicide-resistant cultivars. In this study, a mutant resistant to acetolactate synthase (ALS)-inhibiting herbicides was obtained by ethyl methanesulphonate (EMS) mutagenesis using an elite cultivar, Longya10. Whole-plant dose–response assays revealed that, compared to Longya10, the mutant was 11.57-fold more resistant to tribenuron-methyl (TBM) and slightly resistant to imazethapyr (resistance index (mutant/Longya10) < 3). In vitro acetolactate synthase assays showed that the relative resistance of the mutant was 12.63 times more than that of Longya10. A biochemical analysis indicated that there was a Pro197Ser (relative to the Arabidopsis thaliana ALS sequence) substitution within the LuALS1, conferring high resistance to sulfonylurea herbicides in the mutant. Additionally, two cleaved amplified polymorphic sequence (CAPS) markers, BsaI-LuALS1 and EcoO109I-LuALS1, were developed based on the mutation site for marker assistant selection in breeding. Moreover, the mutant did not cause losses in natural field conditions. We find a mutant with ALS-inhibiting herbicide resistance chemically induced by EMS mutagenesis, providing a valuable germplasm for breeding herbicide-resistant flax varieties.
- Subjects
FLAX; HERBICIDES; HERBICIDE resistance; HERBICIDE-resistant crops; ACETOLACTATE synthase; ETHYL methanesulfonate; WEED control
- Publication
International Journal of Molecular Sciences, 2023, Vol 24, Issue 3, p2820
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms24032820