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Articles by S.A. Safavi
Total Records ( 2 ) for S.A. Safavi
  E. Farshadfar , S.A. Safavi and M. Aghaee-Sarbarzeh
  In order to investigate the chromosome(s) involved in salt tolerance based on criteria such as Na+, K+ and K+/Na+ discrimination, Stress Tolerance Index (STI) and Multiple Selection Index (MSI), an experiment was carried out under hydroponics culture using a wheat-barley chromosome addition lines. The results of this investigation based on the morphological, physiological and statistical analysis proved the hypothesis that most of the genes controlling traits affecting salt tolerance are located on chromosomes 4H and 5H. Though, chromosome 6H was also ranked among the genotypes with high STI and MSI, this may show that this chromosome carry QTLs affect on salt tolerance, as well. However, higher Na+ and lower K+/Na+ values of this line compared to 4H and 5H show the less effectiveness of this line on salt tolerance. Carrying higher positive traits on chromosome 4H compared to the 5H and 6H may indicate that the 4H chromosome has proportion of positive genes controlling salinity tolerance. The addition line carrying 4H chromosome of barley can be used in wide hybridization programs to transfer useful salt tolerance genes into wheat germplasm. This line may also be used in QTL mapping in the basic research programs.
  S.A. Safavi , A.B. Ahari , F. Afshari and M. Arzanlou
  Yellow rust caused by Puccinia striiformis f. sp. tritici is undoubtedly, the most important fungal disease of wheat especially in central and Western Asia that causes significant annual yield losses. Production and use of cultivars with durable resistance is the best controlling method. For this purpose, study on reaction of 19 promising lines to yellow rust was carried out in Ardabil in 2008-2009 cropping year. Assessment of adult plant reaction was conducted under field condition with artificial inoculation. Seedling test was also conducted in greenhouse. Slow rusting resistance at adult plant stage was assessed through the Infection Type (IT), Disease Severity (DS), Relative Area Under Disease Progress Curve (rAUDPC) and Coefficient of Infection (CI). Results of mean comparison of CI and rAUDPC indicated that the lines; C-87-1, C-87-2, C-87-3 and C-87-18 had the highest CI and rAUDPC. The lines C-87-6, C-87-8 and C-87-11 had the susceptible reaction at seedling test and were moderately resistant to moderately susceptible at adult plant stage. Consequently, these lines with low rAUDPC (15.2 to 27.8%) most probably could have slow rusting resistance. The lines C-87-4, C-87-5, C-87-13, C-87-14 and C-87-17 had not any infection or were at low level of infection, thus, they were selected as immune or resistant lines. The rest lines were moderately resistant to moderately susceptible. In this study, correlation analysis of different parameters also showed highly strong relationship of CI with rAUDPC and disease severity (R2 = 0.91 and 0.98, respectively).
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