Jafar Ahmadi

Jafar Ahmadi

Professor

About

68
Publications
17,723
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677
Citations
Citations since 2016
37 Research Items
629 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150

Publications

Publications (68)
Article
Full-text available
Tomato Fusarium wilt, caused by Fusarium oxysporum f. sp. lycopersici (Fol), is a destructive dis-ease that threatens the agricultural production of tomatoes. In the present study, the biocontrol potential of strain KR2-7 against Fol was investigated through integrated genome mining and chemical analysis. Strain KR2-7 was identified as B. inaquosor...
Article
Full-text available
The decrease of genetic variation in crops like tomato (Solanum lycopersicum L.) due to domestication, breeding, and population bottle necks for fresh market consumptions has increased the need for this cash crop’s conservation and characterizations. To study the genetic variation of this valuable genetic resource in the National Plant Gene Bank of...
Article
In order to assess the genotype by environment interaction (GE) and select genotypes to exploit narrow and broad adaptations, twenty-two spring oilseed rape genotypes were subjected to field surveys at five experimental sites in the 2015-16 and 2016-17 growing seasons. Plant materials were sown in the form of a randomized complete block design wit...
Article
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The main goals of the present study were evaluation of genetic diversity in 53 Aegilops accessions belonging to Aegilops tauschii, Ae. cylindrica and Ae. crassa as well as comparison of the efficiency of start codon targeted (SCoT) and targeted region amplification polymorphism (TRAP) markers. In total, 15 SCoT and six TRAP pair primers amplified 1...
Article
In this study, we analyzed the behaviour of several neglected, ancestral, and domesticated wheat genotypes, including Ae. triuncial is, Ae. neglecta, Ae. caudata, Ae. umbellulata, Ae. tauschii, Ae. speltoides, T. boeoticum, T. urartu, T. durum, and T. aestivum under control and salinity stress to assess the mechanisms involved in salinity tolerance...
Article
Full-text available
Abstract Fusarium wilt of tomato is one of the most prevalent and economically important diseases of tomato worldwide especially in tropical regions. The aims of the present study were to isolate and characterize Bacillus bacteria from tomato rhizospheric soil of various regions in Iran and determine the isolates that exhibit high levels of antago...
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زيتون به عنوان يکی از مهم ترين گياهان باغی شناخته میشود که دارای بيش از 9011 رقم کاملاً متمايز و تعداد فراوانی رقم وحشی در جهان است. در اين مطالعه تنوع ژنتيکی موجود در يک مجموعه از ارقام زيتون ايرانی و خارجی با استفاده از نشانگرهای ISSR ارزيابی شد. در مجموع 91 11 درصد( چند شکل بود. ميانگين / آغازگر، 911 قطعه تکثير يافت که 970 قطعه از آن ها ) 20 شاخ...
Article
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Abiotic stresses such as cold, heat, and drought are the main causes of universal crop losses. Plants have generated adaptive responses which prevent them from oxidative damage caused by environmental stresses. The present research aimed to evaluate the effect of cold stress on lipid peroxidation and antioxidant enzyme activity in the leaves of eig...
Article
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Wild relatives of wheat have served as an ideal gene pool for improving drought tolerance in wheat. The objective of this study was to investigate the expression patterns of several antioxidant genes comprising MnSOD, APX and GPX in the different cultivated and wild wheat species under control and drought stress conditions. The results of analysis...
Article
Wild relatives of wheat have served as a pool of genetic variation for understanding salinity tolerance mechanisms. Two separate experiments were performed to evaluate the natural diversity in root and shoot Na+ exclusion and K+ accumulation, and the activity of four antioxidant enzymes within the extensive collection of ancestral wheat accessions....
Article
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Wild relatives of wheat are an outstanding source of resistance to both abiotic and biotic stresses. In the present study, we evaluated the activity of four antioxidant enzymes—superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX)—along with photosynthetic pigments and shoot biomass in 12 Aegilops–Trit...
Article
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Glutenin and gliadin subunits play a key role in flour processing quality by network formation in dough. Wild relatives of crops have served as a pool of genetic variation for decades. In this study, 180 accessions from 12 domesticated and wild relatives of wheat were characterized for the glutenin and gliadin genes with allele-specific molecular m...
Article
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In this study, we selected 180 accessions from different wild relatives of wheat (Aegilops–Triticum species) and tested them in the presence of a tolerant and a sensitive control variety under well-watered and drought-stressed conditions. The results of analysis of variance for dry masses and all measured root traits showed that water regimes, acce...
Article
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Da bi se procenila stabilnost prinosa dvadeset genotipova hlebne pšenice, eksperiment je sproveden u randomiziranom kompletnom blok dizajnu (RCBD) sa tri ponavljanja u sušnim uslovima navodnjavanja na Univerzitetu Razi u Kermanshahu tri godine (2011-2013). Kombinovana analiza varijanse pokazala je veoma značajne razlike za GEI. Stabilnost utvrdena...
Article
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The knowledge about genetic diversity in the wild relatives of wheat provides useful information for breeding programs and gene pool management. In the present study, an assessment of agro-morphological diversity and molecular variability among 70 accessions of Triticum, belonging to T. boeoticum, T. urartu, T. durum and T. aestivum species, col...
Article
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S. rebaudiana produces steviol glycosides including stevioside and rebaudioside A that are valuable as low calorie sweeteners. The objective of this study was to investigate the effects of salicylic acid elicitation and sampling times on the improvment of stevioside and rebaudioside A production and KA13H, UGT74G1 and UGT76G1 genes expression. The...
Article
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We assessed the molecular genetic diversity and relationships among some Aegilops and Triticum species using 15 start codon-targeted (SCoT) polymorphism markers. A total of 166 bands amplified, of which 164 (98.79%) were polymorphic. Analysis of molecular variance and inter-population differentiation (Gst) indicated high genetic variation within th...
Article
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In this study, a core collection of 180 Aegilops and Triticum accessions belonging to six diploid (T. boeoticum Bioss., T. urartu Gandilyan., Ae. speltoides Tausch., Ae. tauschii Coss., Ae. caudata L. and Ae. umbellulata Zhuk.), five tetraploid (T. durum, Ae. neglecta Req. ex Bertol., Ae. cylindrica Host. and Ae. crassa Boiss) and one hexaploid (...
Article
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Wild progenitors of common wheat are a potential source of tolerance to biotic and abiotic stresses. We conducted a glasshouse pot experiment to study genotypic differences in response to drought stress in a collection of 180 accessions of Aegilops and Triticum along with one tolerant and one sensitive control variety. Several physiological traits...
Article
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Genetic erosion in cultivated wheat provides a good reason for studying genetic diversity in crop wild relatives. In the present study, genetic diversity of 32 accessions belonging to T. boeoticum species collected from different parts of Iran were evaluated using 13 morphological traits as well as 10 inter-simple sequence repeat (ISSR) primers. St...
Article
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The genus of Aegilops is an important wild relative of common wheat, and the species in this genus have a key role in hexaploid wheat evolution and they are the donor of D and B genomes, directly and indirectly. To assess the agro-morphological variation in Iranian Aegilops species, 109 accessions belonging to 8 species collected from different are...
Article
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Salinity in higher plants is the cause of toxicity and osmotic stress. To identify the expression pattern of salinity tolerance genes in soybean, it was investigated the relative expression of three genes, GmPAP3, GmBZIP50 and GmP5CS at two tissues leaf and root in Williams (as tolerant) and L17 (as susceptible) soybean genotypes under two levels z...
Article
The objective of the current work was to evaluate the effect of drinking water with various levels of total dissolved solids (TDS) and betaine supplementation on the performance and gene expression of betaine-homocysteine S-methyltransferase (BHMT) in broiler chickens. In a completely randomized design with a 3×2 factorial arrangement, chicks were...
Article
Full-text available
The genus Salvia includes an enormous assemblage of nearly 1,000 species dispersed around the world. Due to possible threats to this genus, there is an immediate requirement to evaluate the diversity of its wild populations. ISSR and RAPD molecular techniques were used to evaluate the genetic relationships among twenty-one ecotypes of eight Salvia...
Article
Full-text available
In order to evaluating of stability and response of grass pea advanced lines under rainfed conditions, fourteen grass pea advanced lines were studied based on randomized complete block design with three replications at three research stations located in Khoram Abad, Kermanshah and Gachsaran during 2005-2008 crop seasons. Based on combined ANOVA ana...
Article
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The main goal of this study was to improve pure lines for low input agricultural areas of the semi-arid region of Iran and similar environmental conditions. Forty barley pure lines provided from ICARDA along with three check cultivars were evaluated under rain-fed conditions in a semi-arid region of Iran during two years (2011-2013). The experiment...
Article
Full-text available
The genus Salvia includes an enormous assemblage of nearly 1,000 species dispersed around the world. Due to possible threats to this genus, there is an immediate requirement to evaluate the diversity of its wild populations. ISSR and RAPD molecular techniques were used to evaluate the genetic relationships among twenty-one ecotypes of eight Salvia...
Article
Full-text available
Abstract: Under drought stress, a signaling system induces the expression of specific genes to alleviate the harmful effects of droughtstress. The BZIP gene is a transcription factor in the signaling abiotic stresses and plays a role in the regulation of responses to differentstresses in plants. The P5CS gene controls the activity of the proline-5-...
Article
Full-text available
Evolution of the effects of G × E interaction on identification of stabile and high performance cultivars under different environmental conditions is very important in plant breeding. To study the stability, 22 barley advanced lines and two check varieties were evaluated using randomized complete block design with four replications at Gachsaran Dry...
Article
Full-text available
Wheat is the first and the most important grain of the world and its bakery property is due to glutenin and gliadin qualities. Wheat seed proteins were divided into four groups according to solubility. Two groups are albumin and globulin dissolving in water and salt solutions possessing metabolic activities. Two other groups are inactive and non-di...
Conference Paper
Full-text available
Wheat is the first and the most important grain of the world and its bakery property is due to glutenin and gliadin qualities. Wheat seed proteins were divided into four groups according to solubility including albumin, globulin, glutenin and prolamin or gliadin. Gliadins are major components of the storage proteins in wheat endosperm. It seems tha...
Article
Full-text available
Multi-environment trials show a significant role in selecting the best cultivars to be used at different locations. Objective of this study was to identify grain and forage yields stability of grass pea advanced lines across different locations. The 14 advanced lines of grass pea, developed by the International Center for Agricultural Research i...
Article
Full-text available
To evaluate genotype × environment interaction (GEI) of grapevine, 20 genotypes of grapevines with Russian origin were evaluated at one location in Urmia and four locations in Takestan (two locations under full irrigation and two locations under drought stress). This research was performed in a randomized complete block design with three replicatio...
Article
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This study was carried out to assessment of heritability and relationships among agro-morphological characters and grain yield of 14 grass pea lines in two years at dry land farming condition. Analysis of variance revealed significant differences among the lines for number of days to maturity, grain filing duration and 100-seed weight in the first...
Conference Paper
Full-text available
The quality of wheat flour related to seed storage proteins (gluten), which consist of high molecular weight (HMW), low molecular weight (LMW) glutenin and gliadins subunits, that are contain about 80 percent of the seed storage. In order to study allelic variation for LMW and gliadins subunits coding genes, 40 accessions of T. boeoticum and T....
Article
Full-text available
GmOSBP gene plays a key role in the signaling of several physiological characters in response to stress. GmbZIP gene is belong to the subfamily of AREB and is a transcription factor in the signaling of abiotic stresses and plays a role in responses to different stresses in plants through inhibition of ROS and expression of antioxidant enzyme genes....
Article
Full-text available
The genus Salvia L. belongs to the Lamiaceae family with about 1000 species worldwide including 55 species in Iran. This research was conducted to study of genetic variation between and within Salvia aethiopsis, S. macrosiphon and S. virgata ecotypes by ISSR molecular technique. Five investigated primers could totally produce 65 bands of amplified...
Article
Full-text available
The glutenin and gliadin characteristics of wheat germplasm have a potential value and understanding the allelic distribution in glutenin and gliadin loci is very important for any wheat breeding program. In the present study, we reported the allelic status at Glu-A3 and Gli-A2 loci among a set of 40 accessions of T. boeoticum and T. urartu collect...
Article
Full-text available
Under drought stress, a signaling system induces expression of specific genes to alleviate the harmful effects of drought stress. BZIP gene is a transcription factor in the signaling of abiotic stress and plays a role in the regulation responses to different stresses in plants and activated by ABA and closing the stomata. OSBP gene plays a key role...
Article
Satureja mutica (Lamiaceae) is an herbaceous medicinal plant which grows in Iran. The objective of the study was to obtain an overview of the genetic relatedness among and within seven populations of this species using inter-simple sequence repeat (ISSR). Fourteen ISSR primers amplified a total of 197 DNA fragments of which 176 (88.91%) were polymo...
Article
The best two morphogenesis pathways in Iranian Cumin landraces were optimized in this experiment. The first method is based on callus induction from zygotic embryo extracted from mature seeds and the second method includes direct somatic embryogenesis without callus phase and regeneration to stem. Both methods led finally to development of whole pl...
Article
Full-text available
Due to the low heritability, direct selection for yield has usually low efficiency at rainfed conditions. Therefore, plant breeders may improve yield indirectly through selection of yield contributing traits. The purpose of this study was to suggest a method for indirect selection of promising lines through yield contributing traits. This method wa...
Conference Paper
Full-text available
Drought stress is one of main limiting factor for better growth and performance of plants in arid and semi-arid regions. Under drought stress, a signaling system induces expression of specific genes to alleviate the harmful effects of drought stress. The products of these genes participate in plant protection and help cell structures to be preserve...
Conference Paper
Full-text available
Salinity, after drought, has been the second limiting factor for agricultural production coveing significant levels of Iran farmlands. Salinity problems in plants are created because of toxicity of sodium chloride accumulation and osmotic stress. PAP3 is members of the metallo-phosphoesterase family and have been known to play important roles in ph...
Conference Paper
Full-text available
Salinity, after drought, has been the second limiting factor for agricultural production coveing significant levels of Iran farmlands. Salinity problems in plants are created because of toxicity of sodium chloride accumulation and osmotic stress. P5CS gene controls the activity of pyrroline-5- carboxylate synthesis enzyme (P5CS) that is involved in...
Article
Grass pea (Lathyrus sativus L.) is a crop used for both animal and human consumption. Recently, ICARDA has developed new grass pea lines with the objectives of improving its yield potential and adaptability. The objective of this study was to investigate grain and forage yields stability of several ICARDA released grass pea lines by using additive...
Article
Genotype×environment interactions (GEIs) can affect breeding programs because they often complicate the evaluation and selection of superior genotypes. This drawback can be reduced by gaining insights into GEI processes and genotype adaptation. The objectives of this research were to evaluate: (1) the yield stability of promising wheat lines across...
Article
Full-text available
In order to evaluate the growth indices and effective morphological and physiological traits of spring wheat (Triticum aestivum L.) using the multivariate statistical method, an experiment was conducted on the basis of randomized complete block design with three replications in Meshkin Shahr, Ardabil province in 2007. During and at the end of the g...
Article
Full-text available
Salinity stress is one of the most widespread soil problems next to drought, in rice growing areas. Reducing Sodium (Na+), while maintaining Potassium (K+) uptake in rice are traits that would aid in salinity tolerance. Therefore, the identification of quantitative trait loci (QTLs) associated with those for Na+ and K+ uptake, will enable breeders...
Article
In order to study and assess the effects of drought stress on yield stability and drought tolerance indices in irrigated and non-irrigated conditions, this experiment was conducted in Sarableh and Mehran towns, Ilam province, in 2004 and 2005. The number of 12 genotypes of bread wheat was cultivated under two conditions, including: Non-stressed (ir...