An F2 population derived from a cross between a high salt-tolerance indica variety, TCCP266, and a susceptible elite temperate-japonica Egyptian variety, Sakha102, were produced. We performed QTL mapping for physiological traits related to rice salttolerance. Single plant analysis of each of the polymorphic marker was carried out using randomly selected 288 F2 individuals. 50 polymorphic markers covered four chromosomes of rice (1, 3, 4 and 9). A total of 24 QTL were detected (LOD score > ), which were distributed on the four chromosomes. | Mapping of quantitative trait loci QTL for Na and K uptake controlling rice salt tolerance Oryza sativa L.