Paper Details

Assessment of yield, yield-related traits and drought tolerance of barley (Hordeum vulgare L.) genotypes

Yazdanseta Saman, Majidi Haravan Eslam, Sorkhi Behzad, Mohammadi Soleyman

DOI: https://dx.doi.org/10.12692/ijb/4.12.62-72

Int. J. Biosci. 4(12), 62-72. June, 2014. (PDF)

Abstract:

Barley (Hordeum vulgare L.) is an important winter cereal crop grown in marginal areas. The objectives of this study were to investigate some morphological traits and drought tolerance indices of twenty promising lines and varieties of barley under pre-flowering drought stress and non-stress conditions. A field experiment was conducted in 2012-2013 growing season in Miyandoab Agricultural Research Station. A randomized complete block design with three replicates was conducted. Analysis of variance revealed significant differences among genotypes for number of grains per spike (P<0.01), 1000 grain weight (P<0.01) and harvest index (P<0.05) at both non-stressed and stressed conditions. Significant differences were observed among genotypes for spike number/m2 (P<0.01) and grain yield (P<0.01) in non-stressed and for plant height at stressed conditions (P<0.01). The greatest grain yield under non-stressed condition was obtained by genotype 17 (6873.472 kg ha-1), while, genotype 2 had the lowest yield (5050.736 kg ha-1). As it was expected, drought caused a significant reduction in all agronomic traits. Maximum MP, STI and GMP was recorded for genotype 17, followed by genotypes 4 and 12. The results indicated that they have stable yield performance. Three indices of drought tolerance STI, GMP, MP had the most significant positive correlation with yield in both conditions. Bi-plot display and cluster analysis confirmed the superiority of the genotypes 17, 4, and 12 in both conditions.