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Current Chinese Science

Editor-in-Chief

ISSN (Print): 2210-2981
ISSN (Online): 2210-2914

Review Article Section: Genetics

Swiftly Evolving CRISPR Genome Editing: A Revolution in Genetic Engineering for Developing Stress-Resilient Crops

Author(s): Naghmeh Nejat, Yong Han, Xiao-Qi Zhang, Tianhua He, Penghao Wang and Chengdao Li*

Volume 2, Issue 5, 2022

Published on: 30 June, 2022

Page: [382 - 399] Pages: 18

DOI: 10.2174/2210298102666220324112842

Abstract

Environmental stresses adversely impact crop production, crop quality, and product safety. Climate change is predicted to exacerbate the impacts of stresses on current cropping systems with multilateral impacts on crop productivity and yield, biodiversity, soil fertility, microbial activity, and carbon sequestration. Transforming crop production systems and developing stress and climate- resilient crops are paramount to alleviate pervasive food and nutrition security and food safety issues and achieve a world free from hunger and malnutrition. Modern breeding techniques have been the key to transforming crop production systems and developing stress- and climate-resilient crops. As a rapidly evolving technology, the Nobel Prize-winning CRISPR method is a leading choice for genome editing and a possible major contributor to solving environmental and food insecurity issues. Here, a background on the stressors with far-reaching impacts on food security has been provided, and the principles and advances in classical genome editing (CRISPR/Cas9) that generate DNA double-strand breaks (DSB) have been reviewed. Base editing and prime editing platforms, which are DSB- and template-free, enabling targeted base substitutions, have been discussed. The application of such tools for trait improvement has been evaluated to develop stressresilient crops and high-throughput mutant libraries. Recent developments in the regulatory landscape for genome-edited crops in various countries have been examined. Finally, the challenges and future perspectives toward crop improvement have been highlighted.

Keywords: Abiotic stress, biotic stress, CRISPR/Cas, precision genome editing, trait improvement, regulatory landscape.

Graphical Abstract
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