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Showing 3 results for Salami
Robab Salami, Seyed Abolghasem Mohammadi, Sara Ghafarian, Mohammad Moghaddam,
Volume 2, Issue 2 (3-2016)
Abstract
Barley is the most salt tolerant cereal‚ and is grown in a wide range of climatic conditions. To improve the plant tolerance to salinity‚ expression analysis of genes involved in stress tolerance could be effective in identification and development of tolerant genotypes. In this study, for evaluation of salinity effect on expression of Hv TIP2;3 and Hv TIP4;1 genes (encoding channel proteins in the membrane) in roots of barley, three genotypes; Clipper (salt susceptible), Sahara3771 (salt tolerant) and advanced breeding line (a salt tolerant line derived from a cross between Kavir and Sahra cultivars) were planted under 0, 100 and 200 mM NaCl. To determine the expression differences of these genes, RNA was extracted from root samples harvested at 24 hours, 3 days and 3 weeks after applying salinity treatments and cDNA was generated. Analysis of variance revealed a significant difference among genotypes, salinity levels and sampling stages for Hv TIP2;3 and Hv TIP4;1 genes expression pattern, whereas genotype × salinity interaction for Hv TIP2;3and genotype × sampling stage interaction were significant for both of the studied genes. The expression of TIP 2;3 gene in the 100 mM NaCl was increased in salt susceptible genotype Clipper and decreased in tolerant genotypes compared with control. Mean comparison of genotype and sampling combination showed that the expression level of Hv TIP4;1 gene at 3 weeks after salinity stress was increased in Sahara and advanced breeding line and decreased in Clipper. According to the results‚ it was confirmed that these genes are affected by salinity stress‚ and effective utilization of this genes in the barley in order to increase salinity tolerance could lead to desirable results.
Arash Salami, Mohammadhadi Pahlevani, Khalil Zenalinezhad, Mohsen Esmaeilzadeh Moghaddam,
Volume 5, Issue 1 (9-2018)
Abstract
Collection and conservation of germplasm, particularly for landraces of important agronomically species and organizing their information, cause to continuity of their usefulness and reduce the risk of their genetic erosion. In this experiment, 10 Iranian wheat landraces along with the Chinese Spring cultivar, as control, were used to assess inter and intra populations variation by using ISSR molecular markers and morphological traits. Evaluation of populations in terms of height, spike length, awn length, number of spike nodes, number of grains per spike, flag leaf length and grain weight showed that there were considerable variation among landraces. Also, in some landraces like KhorramAbad and Ardabil, intra population diversity for some of these traits, such as plant height and length of awn, was obvious. Evaluation of the landraces for ISSR markers showed that among 99 scored bands, 78 bands were polymorphic. Percent of polymorphism with mean of 81.88 % was varied from 53.33 for primer of ISSR-4 to 100% for primers of ISSR-9, ISSR-14, ISSR-5 and ISSR-7. Average PIC of the landraces was estimated 3.0. Results of this study showed that there was considerable intra population diversity for the ISSR markers in landraces of KhorramAbad, Maragheh and Torbat-e-Heydarieh however, a little diversity for Khoy, Ahwaz, Isfahan, Mashad, Urmia, Shiraz and Ardabil was observed. Results of this study showed that there is inter and intra genetic diversity within Iranian landraces of wheat with different levels and these landraces can be used as basic population for extraction of pure lines.
Faranak Khanmakoo, Seyed Abolghasem Mohammadi, Robab Salami, Saeed Aharizad,
Volume 5, Issue 2 (3-2019)
Abstract
Fungal diseases, especially leaf and stripe rusts are wheat yield reducing factors in Iran and the world. In this study, genetic diversity of 20 wheat varieties with different response to leaf and stripe rusts were studied using primers designed based on the conserved regions of plant disease resistance genes. The banding patterns of polymorphic markers were scored as dominant and number of amplified bands and percentage of polymorphism were determined. In addition, for each primer combination, polymorphic information content (PIC) and marker index (MI) were calculated. Out of the 11 used single primers and primer combinations, five primer combinations and a single primer produced scorable amplification. The maximum and minimum of PIC were observed for LLOOP-1 and H2016-H2020 primer combination with mean value of 0.50 and 0.28, respectively. The primer combinations of H2016-H1146 and H2016-H2020 with mean values of 4.80 and of 2.84, had minimum and maximum of MI, respectively. Cluster analysis based on Neighbor-Joining algorithm and evolutionary P-distance coefficient assigned the varieties into four groups which were in agreement with their response to yellow rust. In principal coordinate analysis, the scatter plot of varieties based on two first coordinates confirmed the groups obtained from cluster analysis.
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