Drought is a one of the most serious abiotic stresses limiting rice production. However, little progress has been made in the genetic analysis of drought tolerance, because it is a complex trait controlled by a number of genes and affected by various environmental factors. The most efficient method for drought tolerance breeding is using drought tolerance genetic resources. We used a doubled-haploid (DH) population consist of 101 lines derived from a cross the drought tolerant cultivar ‘Samgang’ and the drought sensitive cultivar ‘Nagdong’ for QTL analysis. Drought stress was treated by withholding water for 6 weeks, and then rewatered for 7 days. After rewatering visual phenotype was observed according to the standard evaluation system for rice, IRRI. Drought sensitive parent ‘Nagdong’ was almost died, while tolerant parent ‘Samgang’ showed slightly leaf tip dring phenotype. The qdr11 detected on chromosome 11 with flanking markers RM26755-RM287 and accounted for 19% phenotype variation with a LOD score of 3.7.

• Tae-Heon Kim(Department of Functional Crop, NICS, RDA)
• Soo-Kwon Park(Department of Functional Crop, NICS, RDA)
• Woon-Ha Hwang(Department of Functional Crop, NICS, RDA)
• Jong-Hee Lee(Research Policy Bureau, RDA)
• Sang-Ik Han(Department of Functional Crop, NICS, RDA)
• Jun-Hyun Cho(Department of Functional Crop, NICS, RDA)
• You-Chun Song(Department of Functional Crop, NICS, RDA)
• Min-Hee Nam(Department of Functional Crop, NICS, RDA)
• Dong-Soo Park(Department of Functional Crop, NICS, RDA)
• Dong-Jin Shin(Department of Functional Crop, NICS, RDA) Corresponding Author