2023-08-21
【學術亮點】台灣稻熱病菌系逐年分布變遷情形
字體大小
小
中
大
Intelligent Cultivate: Using physiological indicators to Establish a Smart Health Early Warning Platform for Crops【Master Program for Plant Medicine and Good Agricultural Practice / Pei-Chen Chen / Professor】
智慧栽培：應用生理指標建立超前預警之作物栽培管理平台【植物醫學暨安全農業碩士學位學程陳珮臻教授】
上架日期2023-06-21
智慧栽培：應用生理指標建立超前預警之作物栽培管理平台【植物醫學暨安全農業碩士學位學程陳珮臻教授】
| 論文篇名 | 英文：Dynamics of spatial and temporal population structure of Pyricularia oryzae in Taiwan 中文：台灣稻熱病菌系逐年分布變遷情形 |
| 期刊名稱 | Pest Management Science |
| 發表年份, 卷數, 起迄頁數 | 2023, 1-10 |
| 作者 | Yi-Nian Chen, Dong-Hong Wu, Mei-Chun Chen, Meng-Ting Hsieh, Woei-Shyuan Jwo, Guo-Cih Lin, Rong-Kuen Chen, Hau-Ping Chou, Pei-Chen Chen(陳珮臻)* |
| DOI | 10.1002/ps.7621 |
| 中文摘要 | 抗病育種的過程中，如何選擇導入的抗病基因是與田間病原菌族群的變遷有密切關係的。但關於稻熱病原的族群在田裡的分布變遷以及造成毒力特徵改變的成因卻甚少有研究。 研究結果：Piz-5, Pi9(t), Pi12(t), Pi20(t), Pita-2, 和 Pi11抗性基因在本研究8年調查中呈現穩定的抗性。從2014-2021年間收集的1749稻熱病菌株，經國際判別品種麗江新團黑穀單基因系判別之結果，台灣稻熱病族群可依地理位置與毒力特徵分為5個菌系。本研究將這五個菌系於台灣逐年的分布變化由地圖呈現出來，我們可以發現台灣西部菌群基因差異度比東部大，依北回歸線畫分，則是亞熱帶的菌群基因差異比熱帶的大。帶有Pik 基因的水稻品系對L4菌系非常感病，帶有Piz-t的則對L5菌系非常感病，而帶Pish基因的則是對L1非常感病。每個稻熱病菌系的地理分布分界明確，並且逐年的變動也是顯著的。 結論: 在收集稻熱病菌株的8年中，農民所種植的主要水稻品種是造成稻熱病菌變異的主因，但逐年度的變化則可能是與氣候暖化，稻熱病菌系的最適生長與產孢溫度不同而被選太出來。本研究結果可提供未來選育水稻抗病基因的布局，以及相應的田間病害管理策略的決策參考。 |
| 英文摘要 | To gain a better understanding of how Pyricularia oryzae population shifts is important for selecting suitable resistance genes for rice breeding programs. However, the relationships between P. oryzae pathogenic dynamics, geographic distribution, rice varieties, and timeline are not well studied. RESULTS Resistance genes Piz-5, Pi9(t), Pi12(t), Pi20(t), Pita-2, and Pi11 showed stable resistance to the Taiwan rice blast fungus over 8 years of observations. Furthermore, 1749 rice blast isolates were collected from 2014 to 2021 and categorized into five pathotype clusters based on their correlation analysis between the geographic sources and virulence of Lijiangxintuanheigu monogenic lines. A detailed map of their distributions in Taiwan is presented. Isolates collected from the western region of Taiwan had greater pathotype diversity than those from the east region. Isolates collected from the subtropical region had greater diversity than those from the tropical region. Rice cultivars carrying Pik alleles were highly susceptible to pathotype L4. Cultivars with Piz-t were highly susceptible to pathotype L5, and those with Pish were highly susceptible to pathotype L1. The geographical distribution of each pathotype was distinct, and the population size of each pathotype fluctuated significantly each year. CONCLUSION The regional mega cultivars significantly impact the evolution of Pyricularia oryzae in Taiwan within the span of 8 years. However, the annual fluctuation of pathotype populations likely correlate to the rising annual temperatures that selected pathotype clusters by their optimal growth temperature. The results will provide useful information for effective disease management, and enable the R-genes to prolong their function in the fields. |
| 發表成果與AI計畫研究主題相關性 | 本研究所收集的菌株，其毒力基因與最適生長溫度的差異可供以後監測時預測發生的菌系種類，讓未來抗病水稻的種植面積，種植地點有更好的規劃與布局。 |
