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Agricultural Research, Education and Extension Organization
Abstract:   (32 Views)

Identification and introduce of high potential and water deficit stress tolerant is one of effective methods that caused to economic production beside other methods of water deficit management. In order to identification of barley lines, 9 barley elite lines and Bahman variety (check) were studied under complete irrigation and water deficit stress conditions in cropping years 2013-2015. The results of combined variance analysis showed that the interaction effect, line × year was significant for grain yield. This result cleared that barley elite lines had different reactions in the first and second years. In the first year, Bahman genotype under complete irrigation condition and Bahman variety and elite lines 2 and 7 under water deficit stress condition had the greatest grain yield. While in the second year, elite lines 5 and 9 (Jolgeh variety) had the greatest grain yield in both conditions. Results of two years mean for grain yield showed under full irrigation condition, lines of 3, 4, 5, 7, 9(Golgeh variety) and 10 had grain yield by 10-35% greater than Bahman variety. Under water deficit stress comparison with the complete irrigation condition, promising lines 2 and 7 by 15% and 19% respectively, had minimum reduction grain yield among studied barley genotypes. The path analysis result showed that under full irrigation condition, traits flag leaf photosynthesis and biomass had a positive and significant direct effect on grain yield, while traits spike weight and grain number per spike had a negative and significant direct effect on grain yield. On the other hand, traits 1000 grain weight and grain number per spike had a positive and negative significant direct effect on grain yield under water deficit stress condition, respectively. Base on the cluster analysis, the studied genotypes grouped in 5 and 3 clusters under complete irrigation and water deficit stress conditions, respectively. Overall, based on the ranking of genotypes, we can recommend elite lines 5 and 10 for complete irrigation condition, line 7 for water deficit stress condition and line 9 (Golgeh variety) for both conditions.

Type of Study: Research | Subject: General

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