Misman Siti Norsuha, Ab Razak Mohd Shahril Firdaus, Sobri Nur Syahirah Ahmad, Zakaria Latiffah
Paddy and Rice Research Centre MARDI Seberang Perai, 13200 Kepala Batas, Pulau Pinang, Malaysia.
Biotechnology and Nanotechnology Research Centre, MARDI Headquarters, 43000 Serdang, Selangor, Malaysia.
Trop Life Sci Res. 2021 Sep;32(3):147-160. doi: 10.21315/tlsr2021.32.3.8. Epub 2021 Sep 30.
Rice blast caused by () is one of the most serious diseases infecting rice worldwide. In the present study, virulence pattern of six pathotypes (P0.0, P0.2, P1.0, P3.0, P7.0 and P9.0) identified from the blast pathogen collected in Peninsular Malaysia, were evaluated using a set of 22 IRRI-bred blast resistance lines (IRBL) as well as to determine the resistance genes involved. The information on the virulence of the blast pathotypes and the resistance genes involved is important for breeding of new rice variety for durable resistance against blast disease. The IRBL was established from 22 monogenic lines, harbouring 22 resistance genes [, and ]. Based on the disease severity patterns, the tested pathotypes were avirulence towards seven IRBLs [IRBLi-F5, IRBLk-Ka, IRBLkh-K3, IRBLz-Fu, IRBLsh-S, IRBLPi7 (t) and IRBL9-W] of which these IRBLs harbouring , and resistance genes, respectively. Therefore, the results suggested that the seven IRBLs carrying seven resistance genes [, and ] would be suitable candidates of resistance genes to be incorporated in new breeding lines to combat the current blast pathotypes in the field.
由（）引起的稻瘟病是全球感染水稻最严重的病害之一。在本研究中，使用一组22个国际水稻研究所培育的抗稻瘟病品系（IRBL）评估了从马来西亚半岛收集的稻瘟病菌中鉴定出的六种致病型（P0.0、P0.2、P1.0、P3.0、P7.0和P9.0）的毒力模式，并确定其中涉及的抗性基因。关于稻瘟病致病型的毒力以及所涉及抗性基因的信息对于培育抗稻瘟病持久抗性的新水稻品种很重要。IRBL由22个单基因系建立，含有22个抗性基因[，和]。根据病情严重程度模式，测试的致病型对七个IRBLs[IRBLi - F5、IRBLk - Ka、IRBLkh - K3、IRBLz - Fu、IRBLsh - S、IRBLPi7(t)和IRBL9 - W]无毒力，其中这些IRBLs分别含有、和抗性基因。因此，结果表明携带七个抗性基因[、和]的七个IRBLs将是适合纳入新育种系以对抗田间当前稻瘟病致病型的抗性基因候选者。
