Study of traits in different barley types using factor analysis under terminal drought stress and without stress conditions

In order to understand internal relations of traits and defining vindicator factors of barely different type’s specifications, this test has done on 12 types of barely in field of Islamic Azad University of Karaj in a randomized complete block with 3 frequencies on 2009-2010. The measured characteristics include: biologic operation, seed operation, harvest indicator, weight of spike grain, number of grain in spike, physiologic ECC, complete ECC, number of spike in (m), time of grain filling, speed of grain filling, days to being spike, days to pollination, height of bramble, length of awn, length of peduncle bulge out, length of peduncle and length of second internodes. Analysis of variance showed normal and drought conditions, irrigation, among many traits, there are significant differences in the 1% level. In irrigation condition factor analysis depended to catalysis to main components and varimax rotation showed that number of factors which had high values were five that could justify 87.92% of changes.In drought stress condition simple correlation coefficient explained those indicator traits of harvest and speed of grain filling and complete ECC had a significant relationship with grain operation. Also factor analysis depended to catalysis to main components and varimax rotation showed that number of factors which particular had high values were six that could justify 92.11% of changes. Genotypes were grouped using cluster analysis and method of irrigation WARD normal and drought conditions, respectively, 4 and 3 groups were identified.