The identification of Pi50(t), a new member of the rice blast resistance Pi2/Pi9 multigene family |
| |
| Authors: | Xiaoyuan Zhu Shen Chen Jianyuan Yang Shaochuan Zhou Liexian Zeng Jingluan Han Jing Su Ling Wang Qinghua Pan |
| |
| Institution: | (1) Laboratory of Plant Resistance and Genetics, College of Resources and Environmental Sciences, South China Agricultural University, Guangzhou, 510642, China;(2) Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, Guangdong, China;(3) Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China |
| |
| Abstract: | 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?×?LTH F(2) and EBZ?×?LTH BC(1)F(2) 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). |
| |
| Keywords: | |
| 本文献已被 PubMed SpringerLink 等数据库收录！ |
|
