Evaluation of Correlation between Physiological and Morphological Traits with Yield in Hull- less Barley Lines

Relationships between grain yield and yield components in some hull-less barley lines were studied in experiment conducted in a randomized complete block design with 4 replications at the Research Station of Agriculture of Gorgan, Iran. During growth season several characteristics including plant height spike length, number of spike per m2, biological yield, number of total tillers, number of fertile tillers, number of kernel per spike, number of spikelet per spike, relative water content (RWC), coefficient of membrane stability (CMS), flag leaf area, Na/K ratio, grain yield, 1000 kernel weight and harvest index were measured. Results showed that stepwise multivariate analysis was the best suitable model in evaluating of the yield. Path analysis showed that correlation among characteristics which remained in the model was broken into direct and indirect effects. The results derived from correlation and path analysis indicated that almost 70% of the yield increase was due to the direct effect of 1000 kernel weight. Number of kernel per spike was positively significant and number of fertile tillage was also found to have positive and significant direct effect on yield, but number of fertile tiller indirectly affects by higher 1000 kernel weight.