Cross-resistance pattern to ACCase-inhibiting herbicides in a rare Trp-2027-Ser mutation Chinese sprangletop (Leptochloa chinensis) population
文献类型： 外文期刊
作者： Yuan, Guohui 1 ; Tian, Zhihui 1 ; Li, Tao 1 ; Qian, Zhenguan 1 ; Guo, Wenlei 2 ; Shen, Guohui 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Shanghai Engn Res Ctr Low Carbon Agr, Ecoenvironm Protect Res Inst, Shanghai 201403, Peoples R China
2.Guangdong Acad Agr Sci, Inst Plant Protect, Guangzhou 510640, Peoples R China
关键词： ACCase-inhibiting herbicide; cross-resistance; target-site resistance mutation
期刊名称：CHILEAN JOURNAL OF AGRICULTURAL RESEARCH （ 影响因子：1.677； 五年影响因子：1.806 ）
ISSN： 0718-5839
年卷期： 2021 年 81 卷 1 期
页码：
收录情况： SCI
摘要： Chinese sprangletop (Leptochloa chinensis [L.] Nees) is an invasive and troublesome grass weed in the aerobic rice fields in China. The extensive and repeated use of acetyl-CoA carboxylase (ACCase)-inhibiting herbicides has resulted in herbicide resistance in this weed. The objectives of this study were to determine the resistance levels to ACCase-inhibiting herbicides of the putative resistant Chinese sprangletop population CM9-1, collected from a paddy field in Shanghai city, in comparison to the susceptible population SJ3-1, and to characterize its molecular resistance mechanism. The whole-plant dose-response experiments suggested that the population CM9-1 had high-level resistance to cyhalofop-butyl, metamifop and fenoxaprop-P-ethyl, with resistance index of 27.8, 21.4 and 26.2, respectively, and low-level resistance to sethoxydim and pinoxaden, with resistance index of 2.1 and 2.9, respectively, but was sensitive to clethodim. Sequence analysis of the CT domain of ACCase gene revealed a Trp-2027-Ser mutation in resistant plants of the CM9-1 population. This is the first report of the cross-resistance pattern of the Trp-2027-Ser mutation to ACCase-inhibiting herbicides in Chinese sprangletop.
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