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Target-site basis for resistance to flucarbazone-sodium in Japanese brome (Bromus japonicus Houtt.) in China

文献类型： 外文期刊

作者： Li, Qi 1 ; Yu, Jinping 1 ; Guo, Wenlei 2 ; Du, Long 3 ; Bai, Penghua 1 ; Liu, Yixue 1 ;

作者机构： 1.Tianjin Acad Agr Sci, Inst Plant Protect, Tianjin 300381, Peoples R China

2.Guangdong Acad Agr Sci, Guangdong Prov Key Lab High Technol Plant Protect, Plant Protect Res Inst, Guangzhou 510640, Peoples R China

3.Shandong Peanut Res Inst, Pest Biocontrol Lab, Qingdao 266041, Peoples R China

关键词： ALS; Bromus japonicus; dCAPS; gene mutation; herbicide resistance

期刊名称：CHILEAN JOURNAL OF AGRICULTURAL RESEARCH （ 影响因子：1.917； 五年影响因子：1.99 ）

ISSN： 0718-5839

年卷期： 2022 年 82 卷 3 期

页码：

收录情况： SCI

摘要： Japanese brome (Bromus japonicus Houtt.) is a troublesome annual weed and widely distributed in winter wheat (Triticum aestivum L.) fields in the North China Plain. A B. japonicus population (TJ06) suspected of resistance to acetolactate synthase (ALS) inhibitors was found in Tianjin, China. In this study, the TJ06 population with an Asp-376-Glu mutation in ALS gene was identified. TJ06 population developed 66.7-fold resistance to flucarbazone-sodium and exhibited obvious cross-resistance to other two ALS-inhibiting herbicides. The 50% plant growth reduction (GR(50)) to herbicides of pyroxsulam and mesosulfuron-methyl were 28.72 and 39.44 g ai ha(-1), respectively. In in vitro ALS activity assays, the concentration of flucarbazone-sodium required to inhibit 50% ALS activity (I-50) for TJ06 was 11.3-fold greater than that for a susceptible population (TJ01), which was highly correlated with that of whole-plant response experiments and indicated that the Asp-376-Glu mutation leading to resistance reduced sensitivity of the ALS enzyme to flucarbazone-sodium. Besides, one derived cleaved amplified polymorphic sequence (dCAPS) marker was designed to quickly detect Asp376 mutation in ALS gene of B. japonicus.

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