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The aim of this study was to establish the genotype by environment interaction for grain yield and the phenotypic stability of 27 durum wheat genotypes. The study was conducted on the experimental field of the Field Crops Institute - Chirpan. The studied genotypes were set in a randomized block design in four replications with replication size of 15 m2 . The trait yield for 27 varieties has been observed during a three-year period (2015-2017). The local growing technology for durum wheat was applied. Analysis of variance, stability analysis and cluster analysis were used. Significant influence of genotype, environment(year) and genotype by environment interactions on the grain yield was established. The environment(year) has the greatest influence on the expression of grain yield. According to the simultaneous assessment for high yield and stability by Kang, genotypes were ranked as follows: D-8159, D-8148, Reyadur, Saya, D-8032, D-8031, D-8036, D-8040 and D-8091. From the obtained results it is possible to create a strategy for increasing the yield of durum wheat and create new stable varieties. |
