Abstract
Ten durum wheat varieties (Sham3, Crezo, Semito, Icsad65, Abeu, Avanto, LD357E, Um-Rabie5, Bagrajo1 and Waha) were evaluated under rainfed conditions at Duhok using randomized complete block design with three replications for the two seasons 2004/2005 and 2005/2005. Four different row spacing between rows in each season (10, 15, 20 and 25 cm) were used. GE interaction was analyzed using linear regression techniques. Data recorded on: No. days to 50% flowering, plant height, No. of active tillers per plant, spike length, No. of grains per spike, biological yield per plant, grain yield per plant, 1000 grain weight, harvest index and protein percent. Combined analysis results showed that genotypes and environment mean square were significant for all studied characters except protein percent, where environments mean square not significant. GE interaction was significant for all characters except for No. days to 50% flowering and protein percent. Broad sense heritability appeared high for all characters. Simple correlation coefficient was positive and significant for grain yield per plant with plant height, biological yield and harvest index, for 1000 grain weight with plant height and for harvest index with No. of tillers per plant and no. of grains per spike. Stability parameters estimated by Eberhart and Russell method showed that Sham3 variety have stable performance in different environments for No. days to 50% flowering, plant height, No. of active tillers per plant and protein percent.
