Yield Stability Analysis of Durum Wheat Genotypes Using AMMI Method

Abstract

Background and Objective: This research was conducted in order to study Genotype × environment interaction effect and identify adaptable durum wheat genotypes with high yield stability in temperate agro-climate zone of Iran. Materials and Methods: Nineteen elite durum genotypes along with a commercial bread wheat check, Mehrgan, were tested in 4 locations, i.e. Karaj, Kermanshah, Neishabour and khorramabad in temperate agro-climate zone of Iran in two years, 2017-18 and 2018-19. The experiments were conducted in a RCBD design with three replications. For grain yield, combined analyses of variance were performed. In order to precise evaluation of genotype by environment interactions and genotypes stability, stability analysis using AMMI method was undertaken. Results: Based on two main components of AMMI analysis, genotypes 5, 11, 13, 15 and 20 had good stability and based on ASV index genotypes 5, 7,16 and 19 were more stable than check. Finally, genotypes 5, 16 and 19 with average grain yield of 7.497, 7.326 and 7.551 kgha-1, respectively and high yield stability were selected as superior durum wheat genotypes. These genotypes also were desirable based on the days to earing and maturity, plant height and thousands kernel weight. Conclusion: Based on results, genotypes 5, 16 and 19 with high grain yield and low G×E interaction were selected as stable and adaptable durum wheat genotypes. Each of them is superior in on-farm condition, will be introduce as a new durum wheat cultivar for temperate zone of Iran.

Keywords

• keywords: ammi
• durum wheat
• g×e interaction
• temperate zone
• yield stability