数字农科院2.0

Asp-2078-Gly mutation in ACCase confers quizalofop-p-ethyl resistance in Eleusine indica and establishment of a LAMP-CRISPR/Cas12a visual genotyping assay for the target mutation

文献类型： 外文期刊

作者： Jin, Guanglei;Li, Haotong;Yu, Haiyan;Gu, Zumin;Cui, Hailan;Chen, Jingchao;Li, Xiangju

作者机构：

关键词： ACCase-inhibiting herbicides resistance;ACCase mutation;CRISPR/Cas12a;Eleusine indica (L.) Gaertn.;loop-mediated isothermal amplification (LAMP);resistance monitoring

期刊名称： PEST MANAGEMENT SCIENCE

ISSN： 1526-498X

年卷期： 2026 年

页码：

收录情况： SCIE（2025版）

摘要： BACKGROUND Eleusine indica is a widespread, competitive weed causing yield losses in major crops. Repeated use of acetyl-CoA carboxylase (ACCase)-inhibiting herbicides in cotton fields has led to the evolution of resistant populations, posing a growing threat to cotton production in China. This study aimed to elucidate the target-site resistance mechanism of E. indica to quizalofop-p-ethyl and establish a rapid visual detection method based on the identified mutation. RESULTS The NJC-R population showed resistance to quizalofop-p-ethyl (resistance index = 5.5). Gene sequencing revealed that an Asp-2078-Gly mutation in ACCase was one of the mechanisms underlying resistance. Loop-mediated isothermal amplification (LAMP) combined with the CRISPR/Cas12a system was developed to detect this mutation in E. indica. This method not only enabled genotype discrimination (wild-type, heterozygous, homozygous mutant), but also provided visual results within 70 min, exhibiting superior performance compared with the derived cleaved amplified polymorphic sequences assay. In addition, this method eliminated false positives from nonspecific LAMP amplification, was similar to 100-fold more sensitive than a polymerase chain reaction, and the assay results were 100% concordant with Sanger sequencing for the 50 samples tested. CONCLUSION This study confirmed that the Asp-2078-Gly mutation confers quizalofop-p-ethyl resistance in E. indica from the cotton field in China, and LAMP-CRISPR/Cas12a was first applied for detecting ACCase target-site mutations in E. indica. Given its rapidity and high accuracy, this technique has the potential to be applied for resistance monitoring and to guide rational herbicide application. (c) 2026 Society of Chemical Industry.

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