2023-01-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/660679藉由本計畫研究將協助了解影響稉稻水分利用效率之因子，提高在湛水及缺水條件下水分利用效率，藉由根系結構與蒸散作用探討可能的耐性機制，並減少水田因為長時間湛水導致逕流流失的水。本計畫為延續過去與國際水稻研究所(IRRI)所進行之國際合作，在前期的計畫中已將IRRI所找到與耐旱相關之數量性狀基因座qDTY12.1導入到臺灣優良栽培種，因此本年度計畫將 (1)分析與驗證導入臺灣優良品種之耐旱QTL中，參與調控根系與蒸散作用之機制。(2)分析高、低水分利用效率水稻品種之根系性狀。(3)分析高、低水分利用效率水稻品種之蒸散作用。(4)臺灣與國際水稻研究所進行互訪交流，討論研究成果。本計畫中將與國際稻米研究所密切合作分析水分利用效率之相關生理指標，除了導入國際分析標準系統，也將調整分析設置更適合於國內稉稻研究使用。研究中所分析之生理指標也將標準化並可提供未來相關研究參考。 The research of this project will help to understand the factors that affect the water use efficiency of japonica rice and improve the water use efficiency under conventional irrigation and alternative wet-and-dry (AWD) conditions. Explore possible tolerance mechanisms through root structure and evapotranspiration, and reduce the runoff loss of paddy fields due to holding the field water. This project is a continuation of the past international cooperation with the International Rice Research Institute (IRRI). In the previous project, the quantitative trait locus qDTY12.1 identified by IRRI related to drought tolerance has been introgressed into Taiwan’s elite cultivars. Therefore, the aims of this year: (1) Analyze and verify the mechanism of the drought tolerance QTL qDTY12.1 TN11 introgression lines that participate in the regulation of root system and evapotranspiration. (2) Analyze the root traits of rice varieties selected by IRRI with high and low water use efficiency. (3)Analyze the evapotranspiration of rice varieties selected by IRRI with high and low water use efficiency. (4) Conduct online exchanges to discuss research results between Taiwan and the IRRI. In this project, we will work closely with the IRRI to analyze the relevant physiological indicators of water use efficiency. In addition to introducing the international analysis standard system, the analysis settings will also be adjusted to be more suitable for domestic japonica rice research. The physiological indicators analyzed in the research will also be standardized and can provide future references for related research.水分利用效率;水稻;根系結構;Water Use Efficiency;Rice;Root Architecture