Characterization of mutations conferring inherent resistance to acetyl coenzyme A carboxylase‐inhibiting herbicides in turfgrass and grassy weeds. Issue 5 (1st July 2021)

• Record Type: Journal Article
• Authors: Tate, Trent M.; McCullough, Patrick E.; Harrison, Melanie L.; Chen, Zhenbang; Raymer, Paul L.
• Is Part Of: Crop science. Volume 61:Issue 5(2021)
• Page Start: 3164
• Page End: 3178
• Publication Date: 2021-07-01
• Subjects: Crop science -- Periodicals; Cultures -- Périodiques; Cultures de plein champ -- Périodiques; Crop science; Nutzpflanzen; Zeitschrift; Pflanzenbau; Periodicals; 633
• DOI: 10.1002/csc2.20511
• Languages: English
• ISSNs: 0011-183X

Abstract

Abstract: 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. Core Ideas: Mutations conferring resistance to ACCase inhibiting herbicides are common in grasses. These mutations could be used to improve weed control options in turfgrass. Turfgrass species and grassy weeds were screened for presence of these mutations. Site of action point mutations conferring resistance were found in three of 24 species surveyed. This information provides guidance for developing nonGMO herbicide‐resistant system for turfgrass.