نتایج جستجو برای: based markers
تعداد نتایج: 3113487 فیلتر نتایج به سال:
abstract while task-based instruction is considered as the most effective way to learn a language in the related literature, it is oversimplified on various grounds. different variables may affect how students are engaged with not only the language but also with the task itself. the present study was conducted to investigate language and task related engagement on the basis of the task typolog...
Background: Molecular DNA markers are one of the most important tools in molecular biology labs. The size of DNA molecules is determined by comparing them with known bands of markers during gel electrophoresis. There are many different protocols to produce these kinds of molecular markers. In this study we have suggested an efficient strategy to produce molecular weight markers in industrial pr...
genetic diversity relationships of 50 isolates of cytospora schulzeri on apple from different parts of the semirom region were analyzed using 15 polymerase chain reaction (pcr) based markers, 7 random amplified polymorphic dnas (rapds) and 8 microsatellite primed polymerase chain reaction (mp-pcr). using 7 selected rapd primers 113 bands were generated, of which 81 bands were polymorphic (71.7%...
due to the complex assessment of young walnut cultivars (juglansregia l.) based on morphological traits, advance molecular tools have provided a new prospect for cultivar identification and dna fingerprinting. in this study, specific molecular keys were identified for 5 iranian walnut cultivars (juglansregia l.) using 30 ssr markers. the results showed that 5 ssr markers produced polymorphic ba...
in this research, allele frequency and polymorphism of 27 microsatellite markers linked to gene loci controlling grain quality were determined between 47 rice varieties from four different groups including 21 iranian local, 16 improved, 7 irri and 3 upland rice varieties. average number of polymorphic information content (pic) and shannon’s diversity index were 0.54 and 1.14, respectively. maxi...
the identification of molecular markers linked to leaf curl virus (clcuv) disease resistance in cotton has the potential to improve both the efficiency and the efficacy of selection in cotton breeding programs. genetic analysis suggested that clcuv resistance is controlled by a single dominant gene. in this study, an interspecific f2 population derived from a cross of gossypium barbadense and g...
It has been established that the Y chromosome carries genes required for spermatogenesis and male fertility. For many decades worldwide screening for gene identification has been conducted in research laboratories. However, it has been a difficult process in identifying such genes (i.e. causative mutations) which could explain the phenotypic variation and could be potentially used as markers fo...
the ability of composing a coherent and extended piece of writing in second language is considered as a fundamental factor to convey information and ideas of learners through the academic issues. although learners may achieve a perfect academic writing skill through assigning the l2 tasks in content based instruction, but demonstration of their abilities may be related to their ability in l1 es...
Introduction: Genetic identification is now a standard and efficient method for identifying individuals and investigating claimed kinship cases. Commercial kits based on autosomal STR and YSTR genetic markers are widely used for these investigations. Case Report: Two men were introduced by a judicial authority for genetic testing to identify and issue birth certificates for these individual...
metadiscourse markers help writers make coherent and reader- friendly texts, thus of considerable importance in academic writing. the main aim of this study was to investigate how interactive and interactional metadiscourse markers are used by iranian efl learners. an inquiry was carried out to investigate cross-cultural similarities and differences in the use of metadiscourse markers in the di...
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