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This study was consisting of ABYT1 experiment which was conducted in five stations of the cold zone including Karaj, Jolge Rokh, Ardabil, Miandoab and Hamedan and three separate ABYT2 experiments which were conducted in Jolge Rokh and Ardabil commonly, in Miandoab and Hamedan commonly and in Karaj. In each experiment, 17 advanced barley lines and three local controls including Jolge, Mahtab and CB-96-10 were evaluated in a randomized block design with three replications in 2019-2020 cropping season. Combined analysis of variance was done for grain yield after collecting data from all stations. Results showed that for ABYT1 there were significant differences among locations, genotypes and genotype×location interaction effect. For common ABYT2 in Miandoab and Hamedan there was significant difference among locations and genotypes but there was no significant differences among genotype×location interaction effect. For common ABYT2 in Jolge Rokh and Ardabil there were significant differences among locations as well as genotype×location interaction effect, but there was no significant difference among genotypes. Mean comparisons of grain yield among genotypes showed that in ABYT1 genotypes No. 15, 20 (CB-96-10), 6 and 2; in common ABYT2 in Miandoab and Hamedan, genotypes No. 11, 19 (Mahtab), 2 and 20 (CB-96-10) and in common ABYT2 in Jolge Rokh and Ardabil, genotypes No. 1 (Jolge), 17, 18 and 20 (CB-96-10) had the highest grain yield in each experiment, respectively. In ABYT2 experiment conducted in Karaj genotypes No. 6, 16, 4 and 20 (CB-96-10) had the highest grain yield. In total, based on yield and appropriate agronomic traits of genotypes, 7 superior lines from ABYT1, 3 superior lines from common ABYT2 in Miandoab and Hamedan, 3 superior lines from common ABYT2 in Jolge Rokh and Ardabil, and 4 superior lines from ABYT2 of Karaj and in total 17 superior lines from ABYT1 and ABYT2 having general or specific adaptability were chosen to be retested for their performance in the cold zone’s Elite barley yield trial in the following cropping season. Key words : Barley , yield stability, adaptation, cold zone
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