A Pid3 allele from rice cultivar Gumei2 confers resistance to Magnaporthe oryzae

文献类型： 外文期刊

第一作者： Chen, Jie

作者： Chen, Jie;Shi, Yongfeng;Liu, Wenzheng;Fu, Yaping;Zhuang, Jieyun;Wu, Jianli;Chai, Rongyao

作者机构：

关键词： Oryza sativa;Magnaporthe oryzae;Blast resistance gene;NBS-LRR

期刊名称：JOURNAL OF GENETICS AND GENOMICS （ 影响因子：4.275； 五年影响因子：5.223 ）

ISSN： 1673-8527

年卷期： 2011 年 38 卷 5 期

页码：

收录情况： SCI

摘要： Rice blast, caused by Magnaporthe oryzae, is one of the most devastating diseases. Using map-based strategy and in silico approach we isolated a new rice (Oryza sativa L.) blast resistance allele of Pid3, designated Pi25, from a stable blast resistance cultivar Gumei2. Overexpression analysis and complementation test showed that Pi25 conferred blast resistance to M. oryzae isolate js001-20. Sequence analysis showed that Pi25 was an intronless gene of 2772 nucleotides with single nucleotide substitution in comparison to Pid3 at the nucleotide position 459 and predicatively encoded a typical coiled coil-nucleotide binding site-leucine rich repeat (CC-NBS-LRR) protein of 924 amino acid residuals with 100% identity to Pid3 putative protein. The susceptible allele pi25 in Nipponbare contained a nonsense mutation at the nucleotide position 2209 resulting in a truncated protein with 736 amino acid residuals. In addition, 14 nucleotide substitutions resulting in 10 amino acid substitutions were identified between Pi25 and pi25 upstream the premature stop codon in the susceptible allele. Although the mechanism of Pi25/Pid3-mediated resistance needs to be further investigated, the isolation of the allele would facilitate the utilization of Pi25/Pid3 in rice blast resistance breeding program via transgenic approach and marker assisted selection.

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