Study of end-of-season drought stress effects on lengths of peduncles, lengths of extrusions and lengths of flag leaves of irrigated barley lines in moderate regions of Kermanshah province

摘要

In 2009-10, a research was done in order to study the effects of late-season drought stress on yield and yieldcomponents of irrigated barely lines with 2 factors of genotype and drought stress in the form of split plot test inthe format of complete random blocks with 3 repetition in Islamabad-e Gharb Station (Kermanshahprovince).For 9 levels of lines MBD-85-3 , MBD-85-6, MBD-85-8, MBD-85-14, MB-85-3, MB-85-5,MB-85-18and 2 control cultivars Yosuf (D5) and Nosrat, drought stress and genotypes were considered as major andminor factors, respectively. Each plot was set at a 12-m2 area ( each ridge 60 cm). Plant density was set at 400seeds/m2 with 4-5 cm planting depth. Seeding was performed by winter Schneider test seeder with sprinklerirrigation. Soil test determined the amount and type of fertilizer to be used Results of variance analysis indicatedthat the differences between cultivars in terms of peduncle length and between irrigation levels were bothsignificant at probability level of 1%, but cultivar x irrigation interactions were not significant at levels of 1% and5%. Also, results showed that the differences between cultivars in terms of extrusion length and betweenirrigation levels were significant at level of 1%, but cultivar x irrigation interactions were not. For length of flagleaves, results of variance analysis showed that differences between cultivars in terms of the length of flag leavesand between irrigation levels were significant at level of 1%.