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Jansing J, Schiermeyer A, Schillberg S, Fischer R, Bortesi L. Genome Editing in Agriculture: Technical and Practical Considerations. Int J Mol Sci 2019; 20:E2888. [PMID: 31200517 PMCID: PMC6627516 DOI: 10.3390/ijms20122888] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 05/29/2019] [Accepted: 06/06/2019] [Indexed: 01/31/2023] Open
Abstract
The advent of precise genome-editing tools has revolutionized the way we create new plant varieties. Three groups of tools are now available, classified according to their mechanism of action: Programmable sequence-specific nucleases, base-editing enzymes, and oligonucleotides. The corresponding techniques not only lead to different outcomes, but also have implications for the public acceptance and regulatory approval of genome-edited plants. Despite the high efficiency and precision of the tools, there are still major bottlenecks in the generation of new and improved varieties, including the efficient delivery of the genome-editing reagents, the selection of desired events, and the regeneration of intact plants. In this review, we evaluate current delivery and regeneration methods, discuss their suitability for important crop species, and consider the practical aspects of applying the different genome-editing techniques in agriculture.
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Affiliation(s)
- Julia Jansing
- Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Brightlands Chemelot Campus, Urmonderbaan 22, 6167 RD Geleen, The Netherlands.
| | - Andreas Schiermeyer
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstrasse 6, 52074 Aachen, Germany.
| | - Stefan Schillberg
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstrasse 6, 52074 Aachen, Germany.
| | - Rainer Fischer
- Indiana Biosciences Research Institute (IBRI), 1345 W. 16th St. Suite 300, Indianapolis, IN 46202, USA.
| | - Luisa Bortesi
- Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Brightlands Chemelot Campus, Urmonderbaan 22, 6167 RD Geleen, The Netherlands.
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Naegeli H, Birch AN, Casacuberta J, De Schrijver A, Gralak MA, Guerche P, Jones H, Manachini B, Messéan A, Nielsen EE, Nogué F, Robaglia C, Rostoks N, Sweet J, Tebbe C, Visioli F, Wal J, Álvarez F, Ardizzone M, Fernández Dumont A, Liu Y, Neri FM, Ramon M. Scientific Opinion on an application by DOW AgroSciences LLC (EFSA‐GMO‐NL‐2010‐89) for placing on the market the genetically modified herbicide‐tolerant maize DAS‐40278‐9 for food and feed uses, import and processing under Regulation (EC) No 1829/2003. EFSA J 2016. [DOI: 10.2903/j.efsa.2016.4633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Ainley WM, Sastry-Dent L, Welter ME, Murray MG, Zeitler B, Amora R, Corbin DR, Miles RR, Arnold NL, Strange TL, Simpson MA, Cao Z, Carroll C, Pawelczak KS, Blue R, West K, Rowland LM, Perkins D, Samuel P, Dewes CM, Shen L, Sriram S, Evans SL, Rebar EJ, Zhang L, Gregory PD, Urnov FD, Webb SR, Petolino JF. Trait stacking via targeted genome editing. PLANT BIOTECHNOLOGY JOURNAL 2013; 11:1126-34. [PMID: 23953646 DOI: 10.1111/pbi.12107] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 06/21/2013] [Accepted: 07/15/2013] [Indexed: 05/20/2023]
Abstract
Modern agriculture demands crops carrying multiple traits. The current paradigm of randomly integrating and sorting independently segregating transgenes creates severe downstream breeding challenges. A versatile, generally applicable solution is hereby provided: the combination of high-efficiency targeted genome editing driven by engineered zinc finger nucleases (ZFNs) with modular 'trait landing pads' (TLPs) that allow 'mix-and-match', on-demand transgene integration and trait stacking in crop plants. We illustrate the utility of nuclease-driven TLP technology by applying it to the stacking of herbicide resistance traits. We first integrated into the maize genome an herbicide resistance gene, pat, flanked with a TLP (ZFN target sites and sequences homologous to incoming DNA) using WHISKERS™-mediated transformation of embryogenic suspension cultures. We established a method for targeted transgene integration based on microparticle bombardment of immature embryos and used it to deliver a second trait precisely into the TLP via cotransformation with a donor DNA containing a second herbicide resistance gene, aad1, flanked by sequences homologous to the integrated TLP along with a corresponding ZFN expression construct. Remarkably, up to 5% of the embryo-derived transgenic events integrated the aad1 transgene precisely at the TLP, that is, directly adjacent to the pat transgene. Importantly and consistent with the juxtaposition achieved via nuclease-driven TLP technology, both herbicide resistance traits cosegregated in subsequent generations, thereby demonstrating linkage of the two independently transformed transgenes. Because ZFN-mediated targeted transgene integration is becoming applicable across an increasing number of crop species, this work exemplifies a simple, facile and rapid approach to trait stacking.
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Wright TR, Shan G, Walsh TA, Lira JM, Cui C, Song P, Zhuang M, Arnold NL, Lin G, Yau K, Russell SM, Cicchillo RM, Peterson MA, Simpson DM, Zhou N, Ponsamuel J, Zhang Z. Robust crop resistance to broadleaf and grass herbicides provided by aryloxyalkanoate dioxygenase transgenes. Proc Natl Acad Sci U S A 2010; 107:20240-5. [PMID: 21059954 PMCID: PMC2996712 DOI: 10.1073/pnas.1013154107] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Engineered glyphosate resistance is the most widely adopted genetically modified trait in agriculture, gaining widespread acceptance by providing a simple robust weed control system. However, extensive and sustained use of glyphosate as a sole weed control mechanism has led to field selection for glyphosate-resistant weeds and has induced significant population shifts to weeds with inherent tolerance to glyphosate. Additional weed control mechanisms that can complement glyphosate-resistant crops are, therefore, urgently needed. 2,4-dichlorophenoxyacetic acid (2,4-D) is an effective low-cost, broad-spectrum herbicide that controls many of the weeds developing resistance to glyphosate. We investigated the substrate preferences of bacterial aryloxyalkanoate dioxygenase enzymes (AADs) that can effectively degrade 2,4-D and have found that some members of this class can act on other widely used herbicides in addition to their activity on 2,4-D. AAD-1 cleaves the aryloxyphenoxypropionate family of grass-active herbicides, and AAD-12 acts on pyridyloxyacetate auxin herbicides such as triclopyr and fluroxypyr. Maize plants transformed with an AAD-1 gene showed robust crop resistance to aryloxyphenoxypropionate herbicides over four generations and were also not injured by 2,4-D applications at any growth stage. Arabidopsis plants expressing AAD-12 were resistant to 2,4-D as well as triclopyr and fluroxypyr, and transgenic soybean plants expressing AAD-12 maintained field resistance to 2,4-D over five generations. These results show that single AAD transgenes can provide simultaneous resistance to a broad repertoire of agronomically important classes of herbicides, including 2,4-D, with utility in both monocot and dicot crops. These transgenes can help preserve the productivity and environmental benefits of herbicide-resistant crops.
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Affiliation(s)
- Terry R. Wright
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Guomin Shan
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Terence A. Walsh
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Justin M. Lira
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Cory Cui
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Ping Song
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Meibao Zhuang
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Nicole L. Arnold
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Gaofeng Lin
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Kerrm Yau
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Sean M. Russell
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | | | - Mark A. Peterson
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - David M. Simpson
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | - Ning Zhou
- Research and Development, Dow AgroSciences LLC, Indianapolis, IN 46268; and
| | | | - Zhanyuan Zhang
- College of Agriculture, Food, and Natural Resources, University of Missouri, Columbia, MO 65211-7140
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