2020-01-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/660625摘要：臺灣栽培稻主要採用湛水灌溉方式，然而近年來隨著非農業用水需求增加，如工業用水，往往造成水資源分配的問題。大部分水稻可利用的水分只佔約10%之灌溉水。因此提高水田的水分利用效率就成為重要的一項議題，針對水稻之耐乾旱研究過去國內外發表許多重要的成果，並分離出數個重要的數量性狀基因座，這些數量性狀基因座被發現與水稻耐旱並維持產量有高度相關性。過去在乾旱條件下所育成之品種是否會有較高之水分利用效率，以及對於水稻品系間不同的根系型態是否與水分利用效率有其相關性則尚待進一步驗證，因此本研究將探討耐旱相關之性狀與提高水分利用效率之關聯性與應用。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) 調查導入耐旱QTL之臺灣優良品種根系結構與蒸散作用 (2)建立根系結構與蒸散作用之關聯性分析 (3)分析根系結構與水分利用效率之評估 (4)臺灣與國際水稻研究所進行互訪交流，並建立水分利用效率之評估方法。藉由此計畫成果將有助於建立國內&#31241;稻育種上水分利用效率之篩選指標建立，並建立國際水稻生理研究團隊之合作。<br> Abstract: Cultivated rice in Taiwan mainly uses the flooded irrigation method. However, in recent years, with the increase in demand for non-agricultural water, such as industrial water, it has often caused problems in water resource allocation. Most of the available water in rice accounts for only about 10% of irrigation water. Therefore, improving the water use efficiency of paddy fields has become an important issue. Many studies have been published in the past for drought tolerance of rice. Several important quantitative trait loci have been identified. Many of these have been found and there is a high correlation between rice tolerance to drought and maintaining yield. Whether the varieties bred under drought conditions will have higher water use efficiency, and whether the different root types between rice lines and water use efficiency have any correlation need to be further verified, so this study will explore tolerance Correlation and application of droughtrelated traits and improvement of water use efficiency. This project is a continuation of the past international cooperation with the International Rice Research Institute (IRRI). In the previous plan, the drought quantitative trait locus qDTY12.1 was identified and has been introduced into Taiwan`s japonica type cultivars. In this project, we will (1) investigate the root development and the transpiration rate of these introgression lines. (2) establish a correlation analysis between root architecture and transpiration rate. (3) analyze the evaluation of root architecture and water use efficiency. (4) Taiwan and the International Rice Research Institute exchanged visits and established methods for assessing water use efficiency. The results of this project will help establish the establishment of screening indexes for water use efficiency in japonica rice breeding and establish cooperation with international rice physiology research teams.水稻水分利用效率ricewater use efficiency