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Articles by A. Asghari
Total Records ( 3 ) for A. Asghari
  A. Asghari , Y. Agayev and S.A.A. Fathi
  Abstract: Karyological study of four Agropyron species (A. desertorum, A. cristatum, A. pectinoforum and A. imbricatum) showed that these species were tetraploid (2n = 4x = 28) with the base number, x = 7. In the studied cells of A. desertrum, 28 chromosomes with 1 B chromosome and satellite on chromosomes 2 and 4 were exist. The number of chromosomes in studied cells of A. cristatum ranged between 28 and 31 without B chromosome and with satellite on chromosome 3 and 5. In the cells of A. imbricatum that studied, 28 to 33 chromosomes with 1 to 3 B chromosomes and satellite on chromosome 7 were exist. The number of chromosomes in studied cells of A. pectinoforum ranged between 28 and 29 and 1 B chromosome and satellite on chromosome 3 were exist. Finally in the studded cells of four species 28-33 chromosomes were exist (the various forms of aneuploid cells). One to three B chromosomes and chromosomes with satellites also observed in these species.
  A. Arghavani , A. Asghari , M. Shokrpour and Mohammaddost Chmanabad
  This study conducted to analyze genetic diversity in two Agropyron species, A. pectiniforme and A. elongatum, by RAPD analysis. Random Amplified Polymorphic DNA (RAPD) analysis using 12 primers produced 142 polymorphic bands with lengths ranging 564 to 2,000 bp. On the basis of Nei's gene index, the genetic diversity within ecotypes varied from 0.1014 to 0.178. The highest and lowest of this index were obtained in ecotype of 6951 (from A. pectiniforme; 0.178) and ecotype of 225 (from A. elongatum; 0.1014), respectively. The results showed high variation within ecotypes. The average gene diversity within (HS), total (HT) and coefficient of gene differentiation (GST) were 0.13, 0.27 and 0.47, respectively. Analysis of molecular variance (AMOVA) displayed significant variance within and among Agropyron ecotypes. The variance within ecotypes (61.08) was about two times higher than between ecotypes (31.24). Cluster analysis based on RAPD data using Nei's genetic distance categorizes the entries into four clusters. Using principle coordinate analysis, the first three coordinates accounted for the 52.84% of the total variation. Classifying the ecotypes by the two coordinates verified the results of cluster analysis.
  M. Hassanzadeh , A. Asghari , Sh. Jamaati-e-Somarin , M. Saeidi , R. Zabihi-e-Mahmoodabad and S. Hokmalipour
  In order to investigation of water deficit on drought tolerance indices of 27 sesame genotypes, a factorial experiment based on randomized complete block design was carried out in Moghan region in 2006 cropping year with three replications. Factors were: 27 sesame genotype (Karaj 1, Yekta, Oltan, Moghan 17, Naz takshakheh, Naz chandshakheh, Borazjan 2, Borazjan 5, Darab 14, Varamin 37, Varamin 237, Varamin 2822, Zoodrass IS, Hendi, Chini, Yellow white, 5089, Panama, DO-1, TF-3, TKG-21, J -1, RT-54, Hendi 9, Hendi 12, Hendi 14 and Jiroft) and irrigation (complete irrigation and irrigation until beginning of flowering). Results showed that Varamin 2822 genotype and Hendi 12 genotype in stress conditions had the highest yield stability about tolerance (TOL) and Mean Productivity (MP) indices, respectively. Regarding to Geometric Mean Productivity (GMP), Karaj 1, Oltan and Naz takshakheh were at highest level. Based on Stress Susceptibility Index (SSI), Varamin 237, Naz takshakheh, Naz chandshakheh, Oltan, Hendi 12, J-1, Panama genotypes and Jiroft line, were among mid-resistant and Zoodrass IS genotype was as sensitive one. Based on Stress Tolerance Index (STI), Varamin 2822, arranged as mid–resistant genotype. So, Karaj 1, Naz takshakheh, Varamin 237 and Varamin 2822 had highest rates (about mentioned indices) and are suitable for cropping under drought stress conditions.
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