Yield Stability and GEI by AMMI Model in Niger (Guizotia abyssinica L.)

The present investigation was carried out with forty Niger genotypes at multi-environments for assessment of genotype x environment interaction and identification of high yielding and stable genotypes of Niger crop. Forty Niger genotypes were tested across five multi-environments in a randomized block design with replication thrice during Kharif, 2018 and Kharif, 2019. Combined analysis of variance and AMMI analysis of pooled data showed that genotype, environment and GEI effect were highly significant (p < 0.01) for seed yield. As per AMMI GGE biplots, two different mega-environments (METs) were identified, the first MET consists E1, E3 and E4 which are potential and excellent sites for discrimination of superior genotypes and second MET includes E2 and E5 were stable places. The genotypes, G28, G33, G8, G17, and G3 (seed yield plant-1), and G6, G33, G8, G17 and G3 (seed yield plot-1) were suitable for favorable environments while G4 and G7 (seed yield plant-1), and G27, G20, G1, G37 and G25 (seed yield plot-1) were suitable for unfavorable environments. Considering all the stability parameters and AMMI GGE biplots, genotypes, G36, G32, G24 and G10 had high mean seed yield and stable across the environments. These superior genotypes about grain yield and GEI impact, and can be recommended for future investigations.