Evaluation of yield stability of barley genotypes using GGE-biplot method

This study was performed for determine stability of the 18 promising barley lines and two check lines Nosrat and MB-86-5 in Six parts of the temperate zone including Karaj، Isfahan، Birjand، Varamin، Zarghan and Nishapur based on randomized complete block design)RCBD (with three replications and in two cropping seasons (2009-2011). Following combined analysis، grain yield stability assessment was performed using graphical multivariate GGE biplot analysis. Genotypes 1، 2، 16، 5 had very high yield stability. This method was reveald three mega- environments including 1. Karaj، Varamin and Zarghan، 2. Nishapur and Birjand and 3. Isfahan. Superior genotypes 2، 16 and 5 identified for these three mega-environments، Results of this study showed genotype 2 (Kavir Kavir / / Badia Badia / 3 / Torsh Torsh /cr. 279-07/ / 9cr. 279-07 / Bgs Bgs /4/ / 4 / Karoon Karoon / / Kavir Kavir) with an average yield of 6. 626 tons per ha and genotype 16 (ZBL-2640) with an average yield of 6. 438 tons per ha as stable genotypes after check genotype1 with an average yield of 6. 492 tons per ha.