Chromosomal Localization and Relationship Between Field and Laboratory Indices of Drought Tolerance in Wheat-Barley Disomic Addition Lines

To determine chromosomal localization and relationship between field and laboratory indicators of drought tolerance, an experiment was conducted in 2003-2004 cropping season at Sararood agricultural research station, Kermanshah, Iran. Seven genotypes of wheat-barley disomic addition lines provided by International Center for Agricultural Research in Dryland Areas (ICARDA), their donor and recipients together with barley (cv. Sararood-1) and bread wheat (cv. Sardari) checks were grown in a RCBD in field and a CRD in laboratory with three replications. The results of analysis of variance exhibited highly significant differences for promptness index (PI), root length (RL), coleoptile length (CL), yield potential (Yp) and stress yield (Ys). Mean comparison indicated that drought tolerance attributes were related to chromosomes 4H and 5H. Relationship between field (STI) and laboratory (GSI) indicators of drought tolerance showed that GSI can be considerd as an early selection criterion for drought tolerance. Three –D plot and cluster analysis also confirmed that most probably the genes controlling field and laboratory characteristics of drought tolerance in barley might be located on chromosomes 4H and 5H