Study on Genotype X Environment Interaction of Oil Content in Sesame (Sesamum Indicum L.)

Abstract

Combined analysis of variance of oil content of twenty genotypes tested at six locations showed highly significant (p<0.01) difference between the genotypes, locations and GEI, suggesting differential response of genotypes across testing locations and the need for stability analysis. Proportion of variance captured by location is 16.8 %, genotypes 30.5 %, and GEI 4.6 % of the total variation. Highest oil content of 52.5, 52.4, 52.1, and 52.0% was obtained from genotypes Temax, Acc-051-02-Sel-6, Acc-051-02-Sel-10 and Acc-212332-4, respectively. Genotypes Abasena and S gave the lowest oil content of 49.2 and 45.9% respectively. Stability analysis was used to further shed light on the GEI of oil content. Two IPCA of AMMI were significant (P<0.01) and captured the largest portion of variation of the total GEI for oil content, which indicated that the AMMI model 2 was the best for the data set. Genotypes Mehado 80, Argane, Addi, T-85, T-6P32-3 and Kelafo-74 shown little GEI when both IPCA1 and IPCA2 considered and therefore stable.