Indonesian Center for Rice Research, Muara, Bogor, West Java 16119, Indonesia.
Indonesian Center for Rice Research, Sukamandi, Subang 41256, Indonesia.
Plant Dis. 2021 Mar;105(3):675-683. doi: 10.1094/PDIS-05-20-0949-RE. Epub 2021 Feb 8.
A total of 201 isolates of (the causal agent of rice blast) were collected from three rice ecosystems (upland, lowland, and swampy) in five regions of Indonesia (West Java, Lampung, South Sumatra, Kalimantan, and Bali). Their pathogenicities were characterized based on the patterns of reaction of 25 differential varieties (DVs) and the susceptible control Lijiangxintuanheigu (LTH), which was susceptible to all blast isolates. A high proportion of isolates (>80.0%) were virulent to DVs for resistance genes , , , , and (t), and a low proportion of isolates (<12.9%) were virulent to DVs for , , , , , and (t). Virulence to the other DVs for , , , (t), (t), , , , (two lines), (two lines), (t), and (t) showed intermediate frequencies from 20.0 to 80.0%. These isolates were classified into three cluster groups, Ia, Ib, and II, and the frequencies of cluster groups varied between the three ecosystems and the five regions. The frequencies of cluster groups varied between ecosystems and regions, and races varied according to the ecosystems. A total of 27 standard differential blast isolates (SDBIs) were selected from the 201 isolates collected. The set of 25 DVs and these 27 SDBIs will be used as a new differential system for analysis of the pathogenicity of blast isolates and analysis of resistance genes in rice cultivars, which will contribute to building a durable protection system against blast disease in Indonesia.
共从印度尼西亚五个地区（西爪哇、楠榜、南苏门答腊、加里曼丹和巴厘岛）的三个水稻生态系统（旱地、水田和沼泽地）中收集了 201 株 （稻瘟病菌）分离物。基于对 25 个鉴别品种（DVs）和感病对照丽江新团黑谷（LTH）的反应模式，对其致病性进行了特征描述，LTH 对所有的稻瘟病菌分离物均敏感。大多数分离物（>80.0%）对 、 、 、 和（t）的抗性基因的 DVs 具有毒性，而对 、 、 、 、 和（t）的 DVs 具有毒性的分离物比例较低（<12.9%）。对 、 、 （t）、（t）、 、 、 （两条线）、 （两条线）、（t）和（t）的其他 DVs 的毒性表现为 20.0%至 80.0%的中间频率。这些分离物被分为三个聚类群，Ia、Ib 和 II，聚类群的频率在三个生态系统和五个地区之间有所不同。聚类群的频率在生态系统和地区之间存在差异，并且根据生态系统的不同，病菌也有所不同。从收集的 201 个分离物中选择了 27 个标准鉴别稻瘟病分离物（SDBIs）。这 25 个 DVs 和这 27 个 SDBIs 将被用作一个新的鉴别系统，用于分析稻瘟病分离物的致病性和水稻品种中的抗性基因，这将有助于在印度尼西亚建立一个针对稻瘟病的持久保护系统。
