Identification, Selection, and Response of Radiation Induced Towuti Mutant Rice (Oryza Sativa L.) in Drought Stress Conditions

H. Dama (Plant Breeding and Biotechnology Study Program, IPB University Graduate School, Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia)
S. I. Aisyah (Department of Agronomy and Horticulture IPB University, Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia)
S Sudarsono (Department of Agronomy and Horticulture IPB University, Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia)
A. K. Dewi (Center for Application of Isotope and Radiation, National Nuclear Energy Agency (BATAN), Jl. Lebak Bulus Raya No. 49, Jakarta 12440, Indonesia)
K. Wibisono (Center for Food Crops, Research Organization for Agriculture and Food, National Research and Innovation Agency (BRIN),Jl. Raya Jakarta-Bogor KM. 46, Cibinong, West Java 16911, Indonesia)

Atom Indonesia Journal
Vol 48, No 2 (2022): August 2022

Climate change with the impact of drought stress has become a major environmental problem for rice (Oryza sativa L.). The use of gamma ray radiation at a dose of 300 Gy is one way to develop drought tolerant rice varieties with little change to the characteristics of the Towuti variety. However, research is still needed to determine its resistance to drought stress. This study aims to identify characters for selection, genotype selection, and determine the response of Towuti mutant rice to drought stress conditions.The characters that can be used to select rice genotypes under drought stress conditions are plant height, number of leaves, number of tillers, and SPAD chlorophyll value. The Towuti mutant has the best tolerance to drought stress compared to other genotypes. Tolerance to drought stress in the Towuti mutant is not caused by the stay-green gene.