The present investigation was conducted to evaluate 60 hybrid rice cultivars, their parents involving five cytoplasmic male sterile lines and 12 restorer lines along with five checks for their stability across three different agro-climatic zones in Andhra Pradesh, India during kharif 2009. Substantial portion of genotypexenvironment interaction was significant due to the linear component for panicle weight, number of productive tillers per plant, number of filled grains per panicle, 1000-grain weight and single plant yield indicated significant varibility among the experimentation could be predicted. It was also found that stability in single plant yield was due to plasticity and stability in yield components. From the current study, it is concluded that for yield and its important components the potential parents APMS 6A, IR-80559A, KMR-3R, BR-827-35R, IR-63883-41-3R and IR-21567R were stable. Among the hybrids, superior performing stable hybrids APMS 6 AxIR-24R, APMS 6 AxBR-827-35R, IR-80555AxIR-54742R, IR-80559AxIR-54742R, IR-80559AxKMR-3R and IR-80151AxIR-54742R manifested better performance than rest of hybrids due to having favorable combination of all stability parameters with significantly high mean performance levels over promising hybrid checks KRH-2 and PA-6201 for yield and its important components across the three different environmental conditions. Therefore, these hybrids may be recommended for multi-location trials in India before the commercial release.
S. Sreedhar, T. Dayakar Reddy and M.S. Ramesha, 2011. GenotypexEnvironment Interaction and Stability for Yield and Its Components in Hybrid Rice Cultivars (Oryza sativa L.). International Journal of Plant Breeding and Genetics, 5: 194-208.