Molecular basis for resistance to fenoxaprop-p-ethyl in American sloughgrass (Beckmannia syzigachne Steud.)
Molecular basis for resistance to fenoxaprop-p-ethyl in American sloughgrass (Beckmannia syzigachne Steud.)
复制标题
美国腐草 (Beckmannia syzigachne Steud.) 对精恶唑禾草灵抗性的分子基础
DOI：
10.1016/j.pestbp.2012.12.007
复制
发表时间：
2013-02-01
影响因子：
4.7
通讯作者：
Wang, Jinxin
中科院分区：
文献类型：
--
作者：
Li, Lingxu;Bi, Yaling;Wang, Jinxin
美国荒草是中国所在的长江三角洲地区一年生小麦杂草，分布广泛，竞争激烈。为了确认和描述美国荒草种群的抗性和感病特性，用苯恶草胺乙酯进行了全株剂量反应试验。美国荒草抗性种群Dylj对苯恶草灵的抗性是敏感种群Dyyh的21.73倍。通过聚合酶链式反应分析，阐明了该除草剂的抗性基础。抗性的分子分析证实，抗性群体中对亮氨酸突变的Ile(1781)对苯恶草灵具有抗性。这是美国荒草中首次发现与对苯恶草净产生抗药性相关的靶点突变。(C)2013 Elsevier Inc.保留所有权利。
American sloughgrass is a widespread and competitive annual grass weed of wheat in Yangtze River delta of China. Whole-plant dose-response experiments were conducted with fenoxaprop-p-ethyl to confirm and characterize resistant and susceptible American sloughgrass populations. The resistant American sloughgrass population Dylj was 21.73-fold resistant to fenoxaprop-p-ethyl relative to the susceptible population Dyyh. PCR analysis was conducted to elucidate the basis of resistance to the herbicide. Molecular analysis of resistance confirmed that the Ile(1781) to Leu mutation in the resistant population conferred resistance to fenoxaprop-p-ethyl. This is the first report of a target site mutation that corresponded to resistance to fenoxaprop-p-ethyl in American sloughgrass. (C) 2013 Elsevier Inc. All rights reserved.