Determining the most stable potato hybrid using AMMI yield stability analysis method

Abstract Genotype-environment interaction (GEI) is very important for breeders. It is considered a complicated issue in breeding programs to obtain stable high-yielding genotypes and release new genotypes. This study was conducted to achieve a stable high-yielding hybrid that is adaptive to climatic conditions of potato-producing regions. A total of 20 potato hybrids along with five commercial varieties (Savalan, Agria, Caesar, Luta and Satina) were evaluated in a randomized complete block design with three replicates in the Agricultural Research and Natural Resources Stations of Ardabil, Razavi Khorasan, Karaj, Isfahan and Hamadan, all in Iran, for two years (2016 and 2017). Combined ANOVA of yield data for studied genotypes and environments indicates significant differences among potato genotypes, environments, and GE interaction was significant. Thus, the AMMI method and its parameters were used to analyze GEI. The results indicated that only four interaction principal components were significant ( p  < 0.01), which accounted for 81.2% of the GEI sum of squares. Based on type 1 parameters (EV 1 , D 1 , Da1, Za1, FA 1, and SIPC 1 ), genotypes G7, G10, G14, and G20 were identified as to be stable. Moreover, according to the results of type 2, 3 and 5 parameters, genotypes G2, G7, G6, G14, G15, and G20, as well as cultivars Agria and Luta, were found to be stable. Genotypes G6, G7, G14 were stable according to the ASV parameter, and genotypes G4, G6 and G16 were stable based on the MASV parameter. Amongst the stable genotypes identified by the AMMI parameters, genotypes G3, G6 and G14 were stable, adaptive, and high-yielding.