Variability, AMMI and cluster analysis for quality components of different wheat genotypes

Abstract

The present study was carried out to investigate the variability and heritability of wheat quality components and to evaluate the stability of ten wheat genotypes in different environmental conditions. The experiment was conducted in the Center for Small Grains in Kragujevac, Serbia during two growing seasons (2010 and 2011). Thousand grain weight had the highest value of GCV and PCV (7.13 and 7.7%), while test weight had the lowest PCV (3.24%) and protein content had the lowest GCV (1.82%). The highest heritability was observed for thousand grain weight (H2 =85.37%), while the lowest one was found for protein content (H2 =19.56%). The AMMI analysis showed significant effect of the G×E interaction, where first main component was significant for all components. Genotypes KG-56, Arsenal and Osječanka are close to the average values for all components and expressed the highest stability. Genotypes with the highest or lowest average values for analyzed traits, such as Norin 10, Mironovskaya 808, Gruža and Spartanka, showed moderate to high instability. Cluster analysis categorized the genotypes into four groups. The genotype Norin 10 showed the highest distance from other genotypes, whereas the stable genotypes grouped together.