Journal
RICE SCIENCE
Volume 27, Issue 4, Pages 263-277Publisher
ELSEVIER
DOI: 10.1016/j.rsci.2020.05.003
Keywords
rice blast; resistance gene; molecular breeding strategy
Categories
Funding
- National Key Research and Development Program of China [2017YFD0100400]
- Key Studying and Developing Project of Jiangsu Province for Modern Agriculture [BE2018351]
- Major Project of Jiangsu Province for Significant New Varieties Development [PZCZ201702]
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding [BM2018003]
- National Natural Science Foundation of China [31971868]
- National Modern Agricultural Industry Technology System Special Fund [CARS-01-60]
- 333 Project of Jiangsu Province [BRA2017163]
- Key Studying and Developing Project of Yangzhou City for Modern Agriculture [YZ2018048]
- Jiangsu Agricultural Science and Technology Innovation Fund [CX(18)1003, CX(18)2022]
- Open Research Fund of State Key Laboratory for Biology of Plant Diseases and Insect Pests [SKLOF 201909]
- Opening Foundation of Key Laboratory of Plant Functional Genomics of the Ministry of Education [ML201806]
- Fund of Institute of Agricultural Sciences for Lixiahe Region in Jiangsu [SJ17201]
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Rice blast is one of the most destructive diseases affecting rice production worldwide. The development and rational use of resistant varieties has been the most effective and economical measure to control blast. In this review, we summarized the cloning and utilization of rice blast resistance genes, such as Pi1, Pi2, Pi9, Pi54, Pigm and Piz-t. We concluded that three main problems in the current breeding of rice blast resistance are: availability of few R (resistance) genes that confer resistance to both seedling and panicle blast, the resistance effect of pyramided lines is not the result of a simple accumulation of resistance spectrum, and only a few R genes have been successfully used for molecular breeding. Therefore, novel utilization strategies for rice blast R genes in molecular breeding were proposed, such as accurately understanding the utilization of R genes in main modern rice varieties, creating a core resistant germplasm with excellent comprehensive traits, screening and utilizing broad-spectrum and durable resistance gene combinations. Lastly, the trends and possible development direction of blast resistance improvement were also discussed, including new genes regulating resistance identified via GWAS (genome-wide association study) and improving rice blast resistance using genetic editing.
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