Abstract

In order to evaluate the stability of potato tuber marketable using AMMI and GGE bi-plot models a randomized complete block design was conducted with three replications in two years (2017-18) and three regions: Ardabil, Karaj and Hamadan. The results of combined analysis of variance showed that for the simple effects of region, year × genotype, the effect of location × year was significant at 1% probability level. Considering the significant effect of year-to-year interactions on genotype of consumer tuberculosis sustainability criteria using type 1 and 4 of stability determined. Based on parameters with the concept of stability dynamics, hybrids 6 and 12-Kaiser were selected as stable genotypes and hybrids 4 and 10 as unstable genotypes. Since the interaction between year and clones was significant, AMMI method was used to select stable genotypes. The results of AMMI analysis showed that E1 environment (Ardabil) genotypes 1, 4 and 8 as high yielding and stable, genotypes 3, 6, 12 and 13 as stable and low-yield, genotypes No. 2 and 5 as unstable and high-yielding, and genotypes, 7, 10 and 11 were identified as unstable and low product. The results of GGE Bi-plot method showed that the decomposition into first and second principal components was 52.44 and 21.86% explained the percentage change that indicates the relative validity of the GGE change Bi-plot. Based on the Biplot results of cultivars 1, 2, 4, 5 and 8 with mean values of 34.65, 32.42, 32.37 34.4 and 36.91 ton / ha had the highest marketable tuber yield, respectively. Genotypes 4 were the closest cultivar to the ideal genotype that had the highest marketable tuber yield and stability due to being close to the mean environment. Cultures No. 1, 2, 5 and 8 as desirable genotypes. In this experiment, GGE Bi-plot and AMMI models were identified as a suitable method for simultaneous selection of marketable and stable tuber yield and were able to select genotype 4 as a stable cultivar with high marketable tuber yield.

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