Study of yield and yield component of barley promising lines and variations through factor analysis

For the aim of categorizing barley promising lines and variations based on the experimental traits, in crop year of 2012 in Ardebil region 20 barley promising lines and variations were experimented on complete randomized block design with 3 replications. In factor analysis, 3 factors of high eigenvalue were selected which contained 78.261 percent of data’s first variance. According to results of factor analysis, similarity coefficients of most traits are high and these results indicate that the number of selected factors was suitable and the chosen factors could justify trait variations in a desirable way. In the first factor which includes the most range of data change (33.682%) traits of 1000 seeds, days to physiological maturity and seed yield were consisted of high positive and negative coefficients. Therefore this factor can be recognized as a yield factor. The second factor justified 20.420 percent of the variations. Traits of plant height, spike length and number of grains per spike were influential on this factor and this factor can be titled plant height factor. Furthermore the third factor justified 18.159 percent of the variations. As a whole these three factors evaluate a particular trait against other traits.