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

第一作者： Zhu, Xiaoyuan

作者： Zhu, Xiaoyuan;Wang, Ling;Pan, Qinghua;Zhu, Xiaoyuan;Chen, Shen;Yang, Jianyuan;Zeng, Liexian;Han, Jingluan;Su, Jing;Zhou, Shaochuan

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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).

分类号： R394

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