High-Throughput CRISPR/Cas9 Mutagenesis Streamlines Trait Gene Identification in Maize

Liu, H., Jian, L., Xu, J., Zhang, Q., Zhang, M., Jin, M., Peng, Y., Yan, J., Han, B., Liu, J., Gao, F., Liu, X., Huang, L., Wei, W., Ding, Y., Yang, X., Li, Z., Zhang, M., Sun, J., Bai, M., Song, W., Chen, H., Sun, X., Li, W., Lu, Y., Liu, Y., Zhao, J., Qian, Y., Jackson, D., Fernie, A.R., Yan, J. (May 2020) High-Throughput CRISPR/Cas9 Mutagenesis Streamlines Trait Gene Identification in Maize. Plant Cell, 32 (5). pp. 1397-1413. ISSN 1040-4651

Abstract

Maize is one of the most important crops in the world. However, few agronomically important maize genes have been cloned and used for trait improvement, due to the complex genome and genetic architecture. Here we integrated multiplexed CRISPR/Cas9-based high-throughput targeted mutagenesis with genetic mapping and genomic approaches to successfully knock-out 743 candidate genes corresponding to agronomic and nutritional traits. After low-cost barcode-based deep sequencing, 412 edited sequences covering 118 genes were precisely identified from individuals showing clear phenotypic changes. This mutant profile was similar to the ones identified in human cell lines and predictable. An unexpectedly frequent homology-directed repair through endogenous templates was observed and likely caused by the spatial contact between distinct chromosomes. Through several case studies on validation and interpretation of gene function, this targeted mutagenesis library suggested that the integration of forward- and reverse- genetics promises rapid validation of important agronomic genes for crops with complex genomes. Beyond specific findings, this study also guides further optimization of high-throughput CRISPR experiments in plants.

Item Type: Paper
Subjects: bioinformatics
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification
bioinformatics > genomics and proteomics > genetics & nucleic acid processing
bioinformatics > genomics and proteomics
Investigative techniques and equipment
organism description > plant > maize
Investigative techniques and equipment > CRISPR-Cas9
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > DNA repair
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > mutations > mutagenesis
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > mutations
organism description > plant
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > plasmid
CSHL Authors:
Communities: CSHL labs > Jackson lab
Depositing User: Adrian Gomez
Date: May 2020
Date Deposited: 06 Apr 2020 17:36
Last Modified: 01 Feb 2024 15:58
PMCID: PMC7203946
Related URLs:
URI: https://repository.cshl.edu/id/eprint/39234

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