Study of drought tolerance in durum wheat genotypes.

Considering the special place of durum wheat in terms of resistance to environmental stress and diseases and shortage of water resources to cultivate the plant so valuable study on drought resistance in plants is important. In this experiment 25 genotypes of durum wheat crop in years 2008-2009 in both normal and drought conditions in the Ardabil region was conducted. Analysis of variance showed that between genotype and the interaction of genotypes in drought conditions in terms of most traits there was a significant difference. Drought tolerance genotype level using average genotype in two conditions were calculated and compared. Genotypes among all sub convar, genotypes number 18 and 22 terms of performance and tolerance index to the highest allocated. Grouped according to genotype tolerance index cluster method performed and genotypes were classified in three groups of the genotypes number 16, 17, 18, 22 and 24 high due to drought tolerance index in terms of grain weight per main spike weight, spike Home, main spike and grain weight were tolerated with most. Cluster results with the results of drought resistance genotypes were consistent.