List of Articles Varahram Rashidi

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  1 - Relationships between Oil and Grain Yield with Morphologic Traits in Single Cross Hybrids of Sunflower (Helianthus annuus L.)
  A.R. Tarinejad P. Ramezani V. Rashidi M. Ghafari
  Grain and oil yield in sunflower (Helianthus annuus L.) are quantitative traits, which are products of interactions between numbers of traits. Thus, evaluation of different traits and their relationships are important to the researcher. In this study, important agronomi More

  Grain and oil yield in sunflower (Helianthus annuus L.) are quantitative traits, which are products of interactions between numbers of traits. Thus, evaluation of different traits and their relationships are important to the researcher. In this study, important agronomic traits and their relationships in sixteen single cross hybrids in a randomized complete block design experiment with three replications were investigated during 2009 at the Research Station of Islamic Azad University, Tabriz Branch. Result indicated that all of the morphological traits except ratio of kernel/achen, area of the flag leaf and hull weight per head were significant at 5% probability levels. Mean comparisons showed that hybrids including 8(CMS322×R2) and 13(CMS346×R56) possessed promising traits such as seed and oil yield, 100-seed weight, head diameter, stem diameter, total number of seeds per head, ratio of kernel/achen, day to flowering, the number and area of leaf to include in breeding programs. The result also showed that correlations between grain yield and with other traits such as growing period length¸ day to physiological maturity and stem diameter¸ head diameter¸ number of seeds per head and number of filled seeds per were head positive and significant at 5% probability levels.  Manuscript profile
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  2 - Ability of Callus Induction and Plant Regeneration in White Kashan and Red Rey Onions Cultivars (Allium cepa L.) Using Root - tip Culture under Invitro Conditions
  A. Goravanchi S.A. Mousavi zade A.R. Motallebi Azar V. Rashidi
  This present study has been carried out in order to evaluate the effect of culture medium and genotype on callus induction and regeneration of two onion varieties through root tip culture. For callus induction, micro samples from 1-3 mm root tip of 2 day old in vitro ge More

  This present study has been carried out in order to evaluate the effect of culture medium and genotype on callus induction and regeneration of two onion varieties through root tip culture. For callus induction, micro samples from 1-3 mm root tip of 2 day old in vitro germinated plants laied on four culture media (1mg/l 2, 4-D, 0/5mg/l 2, 4-D, 0/5mg/l 2, 4-D with 0/5mg/l kinetin, 1mg/l 2,4-D with 1mg/l kinetin) in darkness conditions. Subculture of samples was done after four weeks. The  produced calluses were laied in embryogenic culture medium for 4 weeks and after formation of embryoes, they were put in plant regeneration culture medium for eight weeks. Result showed that callus induction percentage is affected significantly by cultivar and culture medium, but reciprocal effect of both factors was not meaningful on callus induction percentage. Plant regeneration percentage and number of embryo per callus is affected meaningfully by cultivar, but type of culture medium and reciprocal effect of both factors was not meaningful on plant regeneration percentage and number of embryoes per callus. Embryogenic callus percentage is affected meaningfully by cultivar, but type of culture medium had not meaningful effect on embryogenic callus percentage. Callus induction percentage, plant regeneration percentage, number of embryo per callus and embryogenic callus percentage, are higher in white Kashan cultivar in relation to red Rey one and in culture medium involving hormonal combination of 2,4-D and kinetin, application of 0/5mg/l 2, 4-D can be usful. Considering the callus induction percentage, embryogenic and plant regeneration percentage, white Kashan cultivar and  culture medium containing 0/5mg/l 2, 4-D is appropriate as compared with other cultures.                       Manuscript profile
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  3 - The Effects of Different Sources of Phosphorous and its Solubilizing Bacteria on Growth of the Hybrid Corn (KSC 704)
  سلیمان Mohammadi L. Houshmand H. Kazemi-e- Arbat V. Rashidi S. Arefi
  To study the effects of phosphorous of different sources and its solubilizing bacteria on the corn growth an experiment was conducted at Miyandoab Agricultural and Natural Resources Research Station in 2005 in Iran. The arrangement of experiment was factorial based on R More

  To study the effects of phosphorous of different sources and its solubilizing bacteria on the corn growth an experiment was conducted at Miyandoab Agricultural and Natural Resources Research Station in 2005 in Iran. The arrangement of experiment was factorial based on RCB design with three replications. Treatments consisted of four levels of phosphate solubilizing bacteria: control, thiobacillus bacteria, phosphate solubilizing bacteria and Thiobacillus bacteria and phosphate solubilizing bacteria and three levels of fertilizer: without fertilizer, rock phosphate and triple super phosphate. In this study 0.5 m2 of each plot was sampled every 15 days intervals and were studied the dry matter per unit area (TDM), leaf area index (LAI), crop growth rate (CGR) and relative growth rate (RGR) were analyzed. The results showed that the application of thiobacillus bacteria + phosphate solubilizing bacteria + triple super phosphate increased total dry matter (TDM) and crop growth rate (CGR), while relative growth rate (RGR), decreased. LAI increased slowly during early growing stage but increased rapidly when growth proceeded. The highest LAI (4.3), TDM (3451 gr/m2) and CGR (5.41 gr/m2) were obtained from the application of thiobacillus + phosphate solubilizing bacteria triple super phosphate. Similar results were obtained by the application of thiobacillus + phosphate solubilizing bacteria + rock phosphate. It seems that application of thiobacillus + phosphate solubilizing bacteria is useful for availability of phosphorous to plant. Also, application of rock phosphate, due to low cost, availability of phosphorous to plant and its decreased effect on environment pollution can be used instead of other sources of phosphate fertilizers such as triple super phosphate.   Manuscript profile
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  4 - Evaluation of Durum Wheat Lines for Tolerance to Early Season Cold via Early Planting
  V. Rashidi N. Effat doost A. Biroonara A. Babazadeh L. Moghaddasi
  Cold stress is one of the environmental factors that affect planting date of durum wheat in mountainous North West areas of Iran. To study tolerance of 36 Durum wheat lines for cold, an experiment was conducted in mid winter (mid of February) at the Agricultural Researc More

  Cold stress is one of the environmental factors that affect planting date of durum wheat in mountainous North West areas of Iran. To study tolerance of 36 Durum wheat lines for cold, an experiment was conducted in mid winter (mid of February) at the Agricultural Research Station of Islamic Azad University, Tabriz Branch, in 2007. Experimental design used was simple lattice. The results of analysis of variance showed that the lines under study responded differently to cold as to traits like percentage of survival, yield and its components. This indicates existence of genetic diversity among durum wheat lines. Percentage of survival of the lines 30, 5, 16, 27, 31 and 35 were for higher than those at other lines. Thus, they can be considered to be tolerant to early season cold. Comparison of means showed that lines 35, 31, 16 and 5 possessed higher percentage of survival and other percent survival also correlated positive with plant height, number of fertile spike seed yield and 1000 grain weight. As a whole line 35 was found to be more tolerant to early season cold than the others were. Cluster analysis was divided 36 lines into three groups. Lines in the third group possessed higher percentage of survival, plant height, number of fertile spike, biomass and high yield than their over all means. Manuscript profile
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  5 - Comparison and Classification of Lentil (Lens culinaris) Landraces under Drought Stress Conditions after Flowering
  V. Rashidi S. Chalabi Yani M. Sharifi N. Effatdust
  In order to compare and classify of 15Iranian lentil landraces under drought stress conditions after flowering, an experiment was carried out in split plot lay out based on randomized complete block design with four replications. It was performed at the Agricultural Res More

  In order to compare and classify of 15Iranian lentil landraces under drought stress conditions after flowering, an experiment was carried out in split plot lay out based on randomized complete block design with four replications. It was performed at the Agricultural Research Station of Islamic Azad University, Tabriz Branch, during the cropping year of 2011. The primary factor consisted of drought stress treatments at 2 levels (non stress and stress after flowering) and secondary factor of 15 lentil landraces. Analysis of variance indicated remarkable diversities among the landraces under study and significant differences for interaction of genotype by drought stress levels were obtained for most of the traits measured. Grain yield and number of grains per plant were highly influenced by drought stress. Mean comparisons also showed significant variations among the landraces for number of pods per plant, number of grains per plant, 100- grain weight, hecto liter weight, biological yield, grain yield and harvest index. Drought stress also reduced of plant height, number of pods per plant, number of seeds per plant, 100- seeds weight, hectoliter weight, biological yield, grain yield and harvest index of the lentil landraces under study. Correlation coefficients revealed that, number of seeds per plant and harvest index had significant and positive effect on seed yield under drought stress. Cluster analysis, based on the traits studied, divided the landraces into three groups. In this classification, the landraces of Kaleybar, Garadagh, Kharvana, Horand Danehriz and Shomale Varzegan were distinguished as superior landraces under drought conditions.   Manuscript profile
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  6 - Evaluation of Yield Stability Promising Lines of Rice (Oryza sativa)
  M. Nomani V. Rashidi Sh. Abdollahi H. Rahim-e-Soroush
  Determining new and higher and stable yielding varieties is one of the most important objectives of rice breeding. To achieve this goal, ten promising lines of rice along with two improved cultivars (Hashemi and Kadous) were compared at National Rice Research Institute More

  Determining new and higher and stable yielding varieties is one of the most important objectives of rice breeding. To achieve this goal, ten promising lines of rice along with two improved cultivars (Hashemi and Kadous) were compared at National Rice Research Institute in Rasht, Iran, for three years (2006, 2007 and 2008). The experimental design was randomized complete blocks with four replications in these three years. The combined analysis of variance indicated significant difference among genotypes, for the traits studied. This indicates genetic variation among genotypes understudy. The interaction of genotype × year for yield was significant which demonstrate different responses of genotypes during different years. Different stability analysis methods were used to determine the higher and stable yielding variety like: environmental variance, coefficient of variability, coefficient of regression proposed by Finaly and Wilkinson, Deviation from regression by Eberhart and Russel, Shukla's stability variance, Wricke's equivalence, coefficient of determination of Pintus and non-parametric method of rank. By using these analyses it was found that Hashemi was a stable yielding variety. It was also revealed that line No. 9 (IR78530-45-3-1-3), line No. 6 (IR76993-49-1-1) and 8 (IR78533-30-2-1) were found as stable producer lines.  Manuscript profile