Analysis of yield stability of rice (Oryza sativa L.) landraces under drought conditions with three different approaches

Abstract

A set of sixty landraces along with checks were taken from core group of rice germplasm was studied stability of the genotypes under water stress condition following three different statistical approaches. The three analytical measures of stability namely, Eberhart and Russel model, Yield Index and Drought Susceptibility Index identified only four genotypes viz., Jhitpiti, Angurguchcha, E-1702 and Elayachi (PMBB) with stable mean performance in irrigated, rainfed and terminal stage drought (TSD) condition over two years. Drought intensity index showed high degree of stress in rainfed and TSD conditions. Hence, these four genotypes are said to be stable genotypes under all the three conditions. The four promising genotypes with high genetic stability and stable yield under diverse environments may prove useful in rice breeding programs for enhancing the yield under water stress conditions.