Cited by 1,029CRISPR and Genetic EngineeringPlant Stress Responses and ToleranceGenetically Modified Organisms Research

ARGOS 8 variants generated by CRISPR ‐Cas9 improve maize grain yield under field drought stress conditions

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Shi, Jinrui, Gao, Huirong, Wang, Hongyu, Lafitte, H. Renee, Archibald, Rayeann L., Yang, Meizhu, Hakimi, Salim M., Mo, Hua +1 more·2017·Plant Biotechnology Journal

Abstract

Maize ARGOS8 is a negative regulator of ethylene responses. A previous study has shown that transgenic plants constitutively overexpressing ARGOS8 have reduced ethylene sensitivity and improved grain yield under drought stress conditions. To explore the targeted use of ARGOS8 native expression variation in drought-tolerant breeding, a diverse set of over 400 maize inbreds was examined for ARGOS8 mRNA expression, but the expression levels in all lines were less than that created in the original ARGOS8 transgenic events. We then employed a CRISPR-Cas-enabled advanced breeding technology to generate novel variants of ARGOS8. The native maize GOS2 promoter, which confers a moderate level of constitutive expression, was inserted into the 5'-untranslated region of the native ARGOS8 gene or was used to replace the native promoter of ARGOS8. Precise genomic DNA modification at the ARGOS8 locus was verified by PCR and sequencing. The ARGOS8 variants had elevated levels of ARGOS8 transcripts relative to the native allele and these transcripts were detectable in all the tissues tested, which was the expected results using the GOS2 promoter. A field study showed that compared to the WT, the ARGOS8 variants increased grain yield by five bushels per acre under flowering stress conditions and had no yield loss under well-watered conditions. These results demonstrate the utility of the CRISPR-Cas9 system in generating novel allelic variation for breeding drought-tolerant crops.

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  • CRISPR-Cas9 has been successfully applied to crop plants to alter agriculturally important traits such as disease resistance and drought tolerance.

    “The technique has already been successfully applied to crop plants to alter agriculturally important traits such as disease resistance (Wang et al., 2014) and drought tolerance (Shi et al., 2017).”

    From Genetically engineered crops help support conservation biological control (2019) · cites this paper as Shi et al., 2017

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Authors
Shi, J., Gao, H., Wang, H., Lafitte, H. R., Archibald, R. L., Yang, M., Hakimi, S. M., Mo, H., & Habben, J. E.
Affiliations
Pioneer Hi-Bred (US)
Corresponding author
Shi, Jinrui
Venue
Plant Biotechnology Journal
Publisher
Wiley
Published
2016-08-17
Volume
15
Issue
2
Pages
207-216
ISSN
  • 1467-7644 (ISSN-L)
  • 1467-7652
OpenAlex
W2488393959
Cited by
1,029
References
56
Citations by year
2026: 97 · 2025: 119 · 2024: 99 · 2023: 127 · 2022: 157 · 2021: 145 · 2020: 109 · 2019: 85 · 2018: 47 · 2017: 40 · 2016: 3 · 2014: 1
FWCI
30.33
Type
journal article
Language
en
Open access
Locations
  • Plant Biotechnology Journal (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Stress Responses and Tolerance
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetically Modified Organisms Research
Keywords
maize, drought stress, grain yield, CRISPR/Cas9, ethylene response, promoter replacement, allelic variation, drought tolerance breeding, gene expression
MeSH terms
Gene Editing, Base Sequence, Edible Grain, Zea mays, Ethylenes, Plant Proteins, Promoter Regions, Genetic, RNA, Messenger, Stress, Physiological, Polymerase Chain Reaction, Gene Expression Regulation, Plant, Crops, Agricultural, Plants, Genetically Modified, Biodiversity, Droughts, CRISPR-Cas Systems, CRISPR-Associated Proteins

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