Stability of Maize Hybrids across Environments Using Gge Biplot and Ammi Analysis

Abstract

Twenty six yellow maize hybrids on the basis of stability analysis were evaluated in National Uniform Maize Hybrid Yield Trials conducted across eight diversified environments of Pakistan. Combined analysis of variance based AMMI analysis shown highly significant differences for environments, genotypes and their interactions. The environments explained about 78 percent of the total yield variation followed by genotype by environment interaction. Environment was the main aspect that influences the performance of maize yield in study area. The first two interaction principal component axes (IPCA1 and IPCA2) explained about 63 percent of the grain yield variation due to genotype and genotype by environment interaction (GGE). The GGE biplot analysis shown that entry-2 (Mex-YLHY2) was the most stable hybrid and can be considered as adaptable to all the environments.

A comprehensive evaluation of the adaptability and stability of promising maize hybrids in Indonesia using different stability approaches

“…Table 4 shows that the location effect was significant, meaning the site selection was effective for this experiment. Similar results were reported by Bharathiveeramani et al (2016) and Abid (2018), who observed that the location influenced the yield in their multi-environment trials. The variability in the effect of location suggests that the chosen study sites exhibited diverse capacities for maize performance, as elucidated by Karuniawan et al (2021).…”

Genotype by Environment Interaction on Early-Maturing and High-Yield Maize Hybrids

“…The genotype-by-environment interactions (GEI) and the stability of genotypes tested in different locations can be assessed using the AMMI analysis method [56][57][58]. The AMMI analysis is done when there is a significant genotypeby-environment interaction (GEI) [59]. Variance analysis by AMMI on harvest age revealed that interactions between IPCA1 and IPCA2 were highly significant (p<0.01), while IPCA3 and IPCA4 showed significant interactions (p<0.05) (Table 7).…”