Genotype-Environment Interaction and Phenotypic Stability Analysis for Grain Yield of Durum Wheat in the Central Anatolian Region

Authors : Mevlüt AKÇURA, Yüksel KAYA, Seyfi TANER

Pages : 369-375

View : 20 | Download : 5

Publication Date : 2005-10-01

Article Type : Research Paper

Abstract :The objectives of this research were to assess genotype-environment insert ignore into journalissuearticles values(GE); interaction and to determine stable durum wheat insert ignore into journalissuearticles values(Triticum turgidum var. durum Desf.); genotypes for grain yield in the Central Anatolia. Thirteen durum wheat genotypes were evaluated under rainfed conditions using a randomized complete block design with 4 replications. The study was repeated for 2 years and at 3 different locations around Central Anatolia, Turkey. GE interaction was analyzed using linear regression techniques. There was considerable variation for grain yield among both genotypes and environments. Stability was estimated using the Eberhart and Russell method. According to the stability analysis, genotype 10 was the most stable for grain yield. The regression coefficient insert ignore into journalissuearticles values(bi); for genotype 10 was almost unity insert ignore into journalissuearticles values(bi = 1); and had one of the lowest deviations from regressions insert ignore into journalissuearticles values(s2di);. The coefficient of determination insert ignore into journalissuearticles values(Ri2); for genotype 10 was as high as 0.98, confirming its stability. In contrast, genotypes 2, 7, 8, 11, 12 and 13 showed regression coefficients greater than 1.0, indicating sensitivity to environmental changes for grain yield. Among the genotypes, the highest grain yield was obtained from genotypes 12 and13 insert ignore into journalissuearticles values(3.49 t ha-1 and 3.38 t ha-1); across environments. These genotypes insert ignore into journalissuearticles values(12 and 13); had deviations from regression values insert ignore into journalissuearticles values(s2di); around zero, suggesting that they were responsive to changing environments and could be recommended for favorable environments.
Keywords : Durum wheat, Triticum turgidum var durum Desf, Grain yield, Stability