Genotype x environment interaction and the stability and adaptation of some induced sesame genotypes through mutation breeding

The present study was conducted to provide information on the effect of genotype X environment interaction on the seed yield and the seed oil content of sesame genotypes, as well as the yield stability and adaptation of each genotype. Ten sesame genotypes, including the local variety Giza 32 and two promising induced gamma ray mutants (Mut. 6 and Mut. 8) as well as seven F5 hybrid populations derived from crossing between the local variety and the two induced mutants, were used in this investigation. These genotype were evaluated in the Experimental Farm Project of the Nuclear Research Centre, Atomic Energy Authority Ishash, and at the Agricultural Experiment and Research Centre, Faculty of Agriculture, Cairo University, Giza, as well as on a private farm at El-Saf during 1992 and 1993. The three locations were chosen to provide differences in soil type, which were classified as clay loam, sandy loam and sandy oil at Giza, Inshas and El-Saf, respectively. Two experiments were conducted at each location over the 2 years. The combinations of 2 years and three locations were considered as six different environments. The results indicated that combined analysis of variance revealed highly significant differences as a result of the environments, genotypes, and their interactions, for data recorded on seed yield and oil content, indicating that the genetic potential of genotypes interacted considerably with the varying environments. 1 fig