Unartngam Jintana, Kopmoo Noppol, Pinruan Umpawa, Kosawang Chatchai, Jørgensen Hans Jørgen Lyngs
Department of Plant Pathology, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom 73140, Thailand.
National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Khlong Luang, Pathum Thani 12120, Thailand.
J Fungi (Basel). 2024 Jul 31;10(8):535. doi: 10.3390/jof10080535.
Sheath rot and dirty panicle are some of the major diseases of rice in Thailand. The diseases are traditionally considered to be caused by the pathogen and damage and lower both the quantity and quality of rice grain. In this study, 32 fungal isolates collected from the central and northeastern regions of Thailand were analysed phylogenetically using three molecular markers (ITS, D1/D2 of 28S rDNA and ) and physiological races were determined on 10 differential rice cultivars. We found that is not the only causal agent of sheath rot in Thailand, but was also found. Despite having similar morphological features, the phylogenetic analysis recognised 11 of 32 isolates as and the remaining isolates as . This is the first report of causing sheath rot of rice in Thailand in addition to . Evaluation of physiological races revealed high pathogenic diversity of the two species. Thus, 16 and 11 physiological races were recorded from 21 isolates of and 11 isolates of , respectively. These results indicate that both and are the causal agents of rice sheath rot and dirty panicle in Thailand and that they are pathologically diverse.
鞘腐病和穗腐病是泰国水稻的一些主要病害。传统上认为这些病害是由病原体引起的，会损害并降低稻谷的数量和质量。在本研究中，利用三种分子标记（ITS、28S rDNA的D1/D2和）对从泰国中部和东北部地区收集的32株真菌分离株进行了系统发育分析，并在10个鉴别水稻品种上测定了生理小种。我们发现，[此处原文缺失具体物种名]不是泰国鞘腐病的唯一致病因子，还发现了[此处原文缺失具体物种名]。尽管具有相似的形态特征，但系统发育分析将32株分离株中的11株鉴定为[此处原文缺失具体物种名]，其余分离株鉴定为[此处原文缺失具体物种名]。这是除[此处原文缺失具体物种名]外，[此处原文缺失具体物种名]引起泰国水稻鞘腐病的首次报道。对生理小种的评估揭示了这两个物种的高致病性多样性。因此，分别从21株[此处原文缺失具体物种名]分离株和11株[此处原文缺失具体物种名]分离株中记录到16个和11个生理小种。这些结果表明，[此处原文缺失具体物种名]和[此处原文缺失具体物种名]都是泰国水稻鞘腐病和穗腐病的致病因子，且它们在病理学上具有多样性。
