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Genome engineering of disease susceptibility genes for enhancing resistance in plants

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Abstract

Introgression of disease resistance genes (R-genes) to fight against an array of phytopathogens takes several years using conventional breeding approaches. Pathogens develop mechanism(s) to escape plants immune system by evolving new strains/races, thus making them susceptible to disease. Conversely, disruption of host susceptibility factors (or S-genes) provides opportunities for resistance breeding in crops. S-genes are often exploited by phytopathogens to promote their growth and infection. Therefore, identification and targeting of disease susceptibility genes (S-genes) are gaining more attention for the acquisition of resistance in plants. Genome engineering of S-genes results in targeted, transgene-free gene modification through CRISPR-Cas-mediated technology and has been reported in several agriculturally important crops. In this review, we discuss the defense mechanism in plants against phytopathogens, tug of war between R-genes and S-genes, in silico techniques for identification of host-target (S-) genes and pathogen effector molecule(s), CRISPR-Cas-mediated S-gene engineering, its applications, challenges, and future prospects.

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Funding

The authors are thankful to the Department of Biotechnology, Government of India, for funding the project “Application of Bioinformatics and Computational Biology in Agriculture-BIC” (BT/PR40193/BTIS/137/23/2021).

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RB, SK, JSS, and DS have written and drafted the manuscript. SK and DS have prepared the figures. RB and DS have conceived and coordinated the project. RB and JSS were involved in language editing. The manuscript is seen and approved by all the authors.

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Correspondence to Ritika Bishnoi or Deepak Singla.

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Bishnoi, R., Kaur, S., Sandhu, J.S. et al. Genome engineering of disease susceptibility genes for enhancing resistance in plants. Funct Integr Genomics 23, 207 (2023). https://doi.org/10.1007/s10142-023-01133-w

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  • DOI: https://doi.org/10.1007/s10142-023-01133-w

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