The identification of Pi50(t), a new member of the rice blast resistance Pi2/Pi9 multigene family
文献类型： 外文期刊
作者： Zhu, Xiaoyuan 1 ; Chen, Shen 2 ; Yang, Jianyuan 2 ; Zhou, Shaochuan 3 ; Zeng, Liexian 2 ; Han, Jingluan 2 ; Su, Jing 2 ;
作者机构： 1.S China Agr Univ, Lab Plant Resistance & Genet, Coll Resources & Environm Sci, Guangzhou 510642, Guangdong, Peoples R China
2.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou 510640, Guangdong, Peoples R China
3.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Guangdong, Peoples R China
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）
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收录情况： SCI
摘要： The deployment of broad-spectrum resistance genes is the most effective and economic means of controlling blast in rice. The cultivar Er-Ba-Zhan (EBZ) is a widely used donor of blast resistance in South China, with many cultivars derived from it displaying broad-spectrum resistance against blast. Mapping in a set of recombinant inbred lines bred from the cross between EBZ and the highly blast-susceptible cultivar Liangjiangxintuanheigu (LTH) identified in EBZ a blast resistance gene on each of chromosomes 1 (Pish), 6 (Pi2/Pi9) and 12 (Pita/Pita-2). The resistance spectrum and race specificity of the allele at Pi2/Pi9 were both different from those present in other known Pi2/Pi9 carriers. Fine-scale mapping based on a large number of susceptible EBZ x LTH F-2 and EBZ x LTH BC1F2 segregants placed the gene within a 53-kb segment, which includes Pi2/Pi9. Sequence comparisons of the LRR motifs of the four functional NBS-LRR genes within Pi2/Pi9 revealed that the EBZ allele is distinct from other known Pi2/Pi9 alleles. As a result, the gene has been given the designation Pi50(t).
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