Rice Science ›› 2020, Vol. 27 ›› Issue (4): 263-277.DOI: 10.1016/j.rsci.2020.05.003

• Review • Previous Articles     Next Articles

Strategy for Use of Rice Blast Resistance Genes in Rice Molecular Breeding

Ning Xiao1,2,3,4, Yunyu Wu1,2, Aihong Li1,2,3()   

  1. 1Institute of Agricultural Sciences for Lixiahe Region in Jiangsu, Yangzhou 225007, China
    2Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing 210095, China
    3Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou 225009, China
    4State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2019-08-05 Accepted:2019-12-04 Online:2020-07-28 Published:2020-03-31


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.

Key words: rice blast, resistance gene, molecular breeding strategy