Research Trends and Challenges of Using CRISPR/Cas9 for Improving Rice Productivity

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Abstract
Nowadays, rice production faces significant challenges due to population pressure, global climate change, and outbreak of various pests and diseases. Breeding techniques used to improve rice traits include mutant breeding, cross breeding, heterogeneity, transformation, molecular markers, genome-wide association study (GWAS), and so on. Since the recently developed CRISPR/Cas9 technology can directly target a specific part of a desired gene to induce mutation, it can be used as a powerful means to expand genetic diversity of crops and develop new varieties. So far, CRISPR/Cas9 technology has been used for improving rice characteristics such as high yield, good quality, abundant nutrition, pest and disease resistance, herbicide resistance, and biotic and abiotic stress resistance. This review highlights the mechanisms and optimization of the CRISPR system and its application to rice crop, including resistance to biotic and abiotic stresses, and improved rice quality and yield.

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