Tolerance to drought stress evaluation based on indices of barley lines and sensitivity to drought st ess tolerance in the final season Farming in Birjand

To evaluate promising barley genotypes respond to drought stress at the end of the season climate Birjand, 19 promising barley genotypes with a control line (CH-1-EBYTD82-5) in 2006 in the form of a randomized complete block with three Repeat the two environments without stress and drought stress were studied. Farm irrigation experiment in both medium and without drought stress, and 50 percent flowering the same for all varieties was conducted. Results showed that both environmental conditions (stress and no stress) levels significantly in terms of yield of 5% between genotypes exist. With the indexes of sensitivity and drought tolerance MP, GMP, STI, TOL, SSI and HARM, it turned out that STI index to identify the best genotypes were more tolerant and genotypes based on this index number 6 (Manal/Alanda-01), 14 (Gloria›S) and 18 (Rhn/Lignee527/33/Hml-02 / 11012-2/CM67) and the most tolerant genotypes, number. 9 (QB813-2/3/Alanda-01 / Ssn/Lignee640), 17 (Assala-04) and 4 (Gloria›S ‹/ Saida / Mtn›S›/EH165/3/LBIran/Una80/Lignee640/4/Malouh) genotypes sensitive to drought stress were identified. The first two main components of a total of about 99 percent of the changes indexes were justified. First PC but the share indexes in explaining total variation equal to 0.63 was. Finally, two-dimensional diagram was found that genotype Number 14 (Gloria›S ‹) genotype among the most tolerant genotypes and the studied genotypes Number 9 (QB813-2/3/Alanda-01/ Ssn/Lignee640) and 17 (Assala-04) as drought-sensitive genotypes climate Birjand were identified