Disclosed are a gene which controls the deep rooted characteristics of a plant a transgenic plant having said gene transferred thereinto a method for controlling the deep rooted characteristics of a plant with the use of said gene etc. A genetic locus (Dro1 genetic locus) capable of controlling the deep rooted characteristics of a plant which was detected between a shallow rooted rice cultivar IR64 and a deep rooted rice cultivar Kinandang Patong in a large scaled segregation population was examined by high accurate linkage analysis. As a result it was clarified that the gene region of Dro1 resides in a 6.0 kbp region located between Dro1 INDEL09 which is an InDel marker and Dro1 CAPS05 which is a CAPS marker. It was also confirmed that a transgenic plant transformed by the Kinandang Patong type Dro1 gene shows deep rooted characteristics at a significantly high ratio. It was also confirmed that an individual having the Kinandang Patong type Dro1 gene is resistant to drought.
