Geographical variation in resistance to acetyl-coenzyme A carboxylase-inhibiting herbicides across the range of the arable weed Alopecurus myosuroides (black-grass)
Geographical variation in resistance to acetyl-coenzyme A carboxylase-inhibiting herbicides across the range of the arable weed Alopecurus myosuroides (black-grass)
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DOI：
10.1111/j.1469-8137.2010.03233.x
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发表时间：
2010-01-01
期刊：
影响因子：
9.4
通讯作者：
Le Corre, Valerie
中科院分区：
文献类型：
--
作者：
Delye, Christophe;Michel, Severine;Le Corre, Valerie
为了解植物对农业生态系统中人为选择压力的适应过程，研究了麦冬对抑制乙酰辅酶A羧基酶的除草剂(ACCase)的抗性地理结构。用生物测定法和基因分型方法分别对两种广泛使用的ACCase抑制剂和7个突变的ACCase抗性等位基因的抗性频率进行了评估，发现大多数抗性不是由突变的ACCase等位基因赋予的。抗性和ACCase等位基因分布模式呈嵌合型。抗性和ACCase等位基因的流行程度因国家不同而不同。抗性显然是通过一组抗性等位基因或基因的重复进化而进化出来的，其中大部分仍未确定。除草剂选择压力的个体水平和国家水平的不同，形成了肌醇拟除草剂的抗性。
P>The geographical structure of resistance to herbicides inhibiting acetyl-coenzyme A carboxylase (ACCase) was investigated in the weed Alopecurus myosuroides (black-grass) across its geographical range to gain insight into the process of plant adaptation in response to anthropogenic selective pressures occurring in agricultural ecosystems.We analysed 297 populations distributed across six countries in A. myosuroides' main area of occupancy. The frequencies of plants resistant to two broadly used ACCase inhibitors and of seven mutant, resistant ACCase alleles were assessed using bioassays and genotyping, respectively.Most of the resistance was not endowed by mutant ACCase alleles. Resistance and ACCase allele distribution patterns were characterized by mosaicism. The prevalence of resistance and of ACCase alleles differed among countries.Resistance clearly evolved by redundant evolution of a set of resistance alleles or genes, most of which remain unidentified. Resistance in A. myosuroides was shaped by variation in the herbicide selective pressure at both the individual field level and the national level.