Genotype X Environment In Sorghum Sorghum Bicolor (l.) Moench) Trial

The results obtained from four locations for three year testing of seven lines (genotypes) were used to estimate genotype x year, genotype x location and genotype x year x location interactions for sorghum yield trials. The three main effects (years, locations and genotypes) and their interactions were highly significant (P = 0.01), thus indicating differential genotype response to the environments used. The variance components were relatively small with the second order interaction variance component larger than the first order types involving genotypes. Environmental variance was larger than the interaction variances. Computation of theoretical standard error for cultivar (genotype) means suggest that four replications, six locations and two years is an ideal testing procedure for sorghum in term of cost and time

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