Analysis of yield stability in multi-environment trials of barley (Hordeum vulgar L.) genotypes using AMMI model

M Mohammadi, R Karimizadeh, AA Noorinia, H Ghojogh, T Hosseinpour, GR Khalilzadeh, A Mehraban, M Roustaii, M Hasanpor Hosni

Abstract


Analysis of multi-environment trials for investigation of genotype environment (GE) interaction for yield performance across test environments, and selection of the most favorable genotypes is an important issue in barley breeding programs. The multi-environmental trials were conducted at test locations; Gachsaran, Gonbad, Khoramabad and Moghan, for three years. Sixteen barley genotypes including 14 new improved lines, and the two cultivars; Izeh and local check, were cultivated in randomized complete block design with four replicates. An AMMI model with AMMI1 and AMMI2 biplots were used to determine the mega-environments and wining genotypes. The results of combined analysis of variance indicated main effects of genotypes and environments as well as GE interaction effects were significant. The results of the polygon view of AMMI2 biplot verified relatively the results of AMMI1 and AMMI2 biplots and showed that there of test locations (Gonbad, Khoramabad and Moghan) are three main mega-environments in barley producing areas. Regarding this pattern, genotypes G1, G6, G13 and G16 were as the most favorable genotypes, had specific adaptability for these mega-environments. The best recommended genotypes according to the this investigation were G6 (3591 kg ha-1) for location Khoramabad, G16 (3192 kg ha-1) for location Gonbad, and G13 (3119 kg ha-1) for location Moghan which had high mean yield and was the most stable for related mega- environments.


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