Bacterial Blight Resistance Genes and Strategies for Engineering Broad-spectrum Resistance in Rice

Bacterial Blight (BB), caused by gram-negative bacteria Xanthomonas oryzae pv. oryzae (Xoo), is one of the major constraints for rice production across the world. For decades, a series of rice resistance (R) genes against BB have been identified and extensively used in breeding for resistance. However, the existence and emergence of new virulent Xoo populations or strains always make the resistant varieties short-lived. Deep understanding of the molecular mechanisms of R genemediated resistance is important for effective deployment of R genes. In this mini review, we summarized the advances in identification and characterization of BB R genes, molecular interactions between rice and Xoo, and the strategies for developing varieties with Broad-Spectrum Resistance (BSR) to BB. The future challenges are also discussed.

Author(s): Nan Jiang, Yi Liang, Yu Long, Jun Fu, Kai Wang, Yuanzhu Yang, Xionglun Liu, Junhua Peng

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