Genetic Diversity and Relationship between Yield and Yield Components Morphological in F3 Family of Barley Crosses Badia×Kavir using Multivarite Analysis Methods

In order to study the genetic diversity and the relationship between yields with some morpho-physiological traits, 103 families of F3 barley derived from cross Badia and Kavir were planted in randomized complete block design in three replications at the research field of Gonbad Kavous University, during 2014-2015. Results showed that grain yield and its components, had high genetic variability, and Significant differences were observed among studied taraits except grain length, leaf length, pedancle diameter, number of spikelets and plant hight. Grain yield had the highest correlation (0.58**) with Spike weight. The results of step wise regression showed that biological yield, harvest index, spike weight and plant hight had high contributions on grain yield. Based on the results of Path analysis the most direct and indirect effects in increasing grain yield, belong to biological yield (0.34) and spike weight (0.15) respectively, So these traits were identified as the most important components affecting on grain yield and can be used as selection criteria for yield improvement. Cluster analysis based on measured traits studied families divided into two groups that there was significant differences some of the traits in the between of groups, and the first group was chosen as desirable group.