An herbicide-resistant weed control system that utilizes naturally occurring mutations to acetyl-coenzyme A carboxylase (ACCase)-inhibiting herbicides could provide herbicide selectivity and improve control of grassy weeds in turf. Knowledge regarding the presence of these mutations in grasses is needed to guide development of this type of system. This research subjected 24 species of warm-season, cool-season, and grassy weed species to rates of 0, 400, and 1200 g a.i. ha⁻¹ of fenoxaprop herbicide and surveyed these species for the presence of site-of-action mutations in ACCase at amino acid (aa) positions 1781, 1999, 2027, 2041, 2076, 2088, and 2096. Nine species including Agrostis capillaris L., Festuca ovina L., Festuca rubra L., Lolium multiflorum Lam., Lolium perenne L., Paspalum dilatatum Poir., Poa annua L., Zoysia japonica Steud., and Z. matrella [L.] Merr. were tolerant to fenoxaprop. Site of action point mutations conferring resistance to ACCase herbicides were found at aa position 1781 in only three of 24 species surveyed (Festuca ovina, Festuca rubra, and Poa annua). The information obtained from this study provide guidance for the development of ACCase resistant weed control systems for turfgrass.

中文翻译：

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赋予草坪草和禾本科杂草中乙酰辅酶 A 羧化酶抑制性除草剂固有抗性的突变特征

抗除草剂杂草控制系统利用天然发生的乙酰辅酶 A 羧化酶 (ACCase) 抑制性除草剂突变，可以提供除草剂选择性并改善对草皮中禾本科杂草的控制。需要有关草中这些突变存在的知识来指导此类系统的开发。本研究对 24 种暖季、冷季和禾本科杂草物种进行了 0、400和 1200 g ai ha ^-1的氟唑草胺除草剂，并调查了这些物种是否存在作用位点突变ACC酶在氨基酸（AA）的位置1781，1999，2027，2041，2076，2088，2096和九物种，包括剪股颖茵陈L. ，羊茅属，紫羊茅大号., Lolium multiflorum Lam ., Lolium perenne L. , Paspalum dilatatum Poir. , Poa annua L., Zoysia japonica Steud., and Z. matrella [L.] Merr. 对芬诺沙普耐受。在所调查的 24 种物种（羊羊茅、羊茅和早熟禾）中，仅在 1781 位氨基酸位置发现了赋予对 ACCase 除草剂抗性的作用点突变位点。从这项研究中获得的信息为草坪草抗 ACCase 杂草控制系统的开发提供了指导。