Yield Stability of 14 Rice (Oryza sativa L.) Varieties and Promising Lines

Abstract

Fourteen rice varieties and promising lines were compared for their yield stability using a method proposed by Eberhart and Russell (1966). Data from four groups of yield trials, conducted in 22 enviroments, were analyzed separately to obtain different estimates of stability parameters (means over environments, regression coefficients and deviation mean squares) for individual genotypes. Results from the analyses indicated that all genotypes were quite different in showing stable yield performance. However, few lines were found to be satisfactory in their stability and had high mean yield in each group of environments. It was suggested that the stability analysis would be a very helpful mean to identify adaptable genotypes under different environments.