摘要
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 broadspectrum 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.
基金
the National Key Research and Development Program of China(Grant No.2017YFD0100400)
the Key Studying and Developing Project of Jiangsu Province for Modern Agriculture(Grant No.BE2018351)
the Major Project of Jiangsu Province for Significant New Varieties Development(Grant No.PZCZ201702)
the Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding(Grant No.BM2018003)
the National Natural Science Foundation of China(Grant No.31971868)
the National Modern Agricultural Industry Technology System Special Fund(Grant No.CARS-01-60)
the‘333’Project of Jiangsu Province(Grant No.BRA2017163)
the Key Studying and Developing Project of Yangzhou City for Modern Agriculture(Grant No.YZ2018048)
the Jiangsu Agricultural Science and Technology Innovation Fund[(Grant Nos.CX(18)1003)and CX(18)2022)]
Open Research Fund of State Key Laboratory for Biology of Plant Diseases and Insect Pests(Grant No.SKLOF 201909)
Opening Foundation of Key Laboratory of Plant Functional Genomics of the Ministry of Education(Grant No.ML201806)
Fund of Institute of Agricultural Sciences for Lixiahe Region in Jiangsu(Grant No.SJ17201).
