Selection of the high efficient sgRNA for CRISPR-Cas9 to edit herbicide related genes, PDS, ALS, and EPSPS in tomato
Open accessAbstract
Herbicide resistance is one of the main crop traits that improve farming methods and crop productivity. CRISPR-Cas9 can be applied to the development of herbicide-resistant crops based on a target site resistance mechanism, by editing genes encoding herbicide binding proteins. The sgRNAs capable of editing the target genes of herbicides, pds (phytoene desaturase), ALS (acetolactate synthase), and EPSPS (5-Enolpyruvylshikimate-3-phosphate synthase), were designed to use with the CRISPR-Cas9 system in tomato (Solanum lycopersicum cv. Micro-Tom). The efficiency of the sgRNAs was tested using Agrobacterium mediated transient expression in the tomato cotyledons. One sgRNA designed for editing the target site of PDS had no significant editing efficiency. However, three different sgRNAs designed for editing the target site of ALS had significant efficiency, and one of them, ALS2-P sgRNA, showed over 0.8% average efficiency in the cotyledon genome. The maximum efficiency of ALS2-P sgRNA was around 1.3%. An sgRNA for editing the target site of EPSPS had around 0.4% editing efficiency on average. The sgRNA efficiency testing provided confidence that editing of the target sites could be achieved in the transformation process. We confirmed that 19 independent transgenic tomatoes were successfully edited by ALS2_P or ALS1_W sgRNAs and two of them had three base deletion mutations, which are expected to have altered herbicide resistance. In this study, we demonstrated the usefulness of performing an sgRNA efficiency test before crop transformation, and confirmed that the CRISPR-Cas9 system is a valuable tool for breeding herbicide-resistant crops.
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Next generation sequencing (NGS) is useful for sequencing large mutant populations at lower cost.
“The more advanced next generation sequencing (NGS) is useful for sequencing large mutant populations at lower cost (Peterson et al., 2016;Yang et al., 2022).”
From Genetic resources and precise gene editing for targeted improvement of barley abiotic stress tolerance (2023) · cites this paper as Yang et al., 2022
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Genome editing and improvement of abiotic stress tolerance in crop plants
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“The more advanced next generation sequencing (NGS) is useful for sequencing large mutant populations at lower cost (Peterson et al., 2016; Yang et al., 2022).”
- Authors
- Yang, S. H., Kim, E., Park, H., & Koo, Y.
- Affiliations
- Chonnam National University (KR)
- Corresponding author
- Koo, Yeonjong
- Venue
- Applied Biological Chemistry
- Published
- 2022-02-09
- Volume
- 65
- Issue
- 1
- ISSN
- 0368-2897 (ISSN-L)
- 2468-0834
- 2468-0842
- OpenAlex
- W4211155215
- Cited by
- 49
- References
- 42
- Citations by year
- 2026: 6 · 2025: 16 · 2024: 14 · 2023: 10 · 2022: 3
- FWCI
- 3.51
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Applied Biological Chemistry (publishedVersion, cc-by)
- Funders
- Rural Development Administration of Korea (PJ01477601)
- National Research Foundation of Korea (NRF-2020R1F1A1075575)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetically Modified Organisms Research
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Weed Control and Herbicide Applications
- Keywords
- CRISPR/Cas9, herbicide resistance, target-site resistance, acetolactate synthase, phytoene desaturase, EPSPS, tomato, transgenic tomato, Agrobacterium-mediated transient expression, genome editing
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