نتایج جستجو برای: rf3
تعداد نتایج: 108 فیلتر نتایج به سال:
RPHR-1005, the stable restorer line of the popular medium slender (MS) grain type rice hybrid, DRRH-3 was improved in this study for resistance against bacterial blight (BB) and blast diseases through marker-assisted backcross breeding (MABB). In this study, four major resistance genes (i.e., Xa21 and Xa33 for BB resistance and Pi2 and Pi54 for blast resistance) have been transferred to RPHR-10...
Study of heritability and gene action to improve agronomic and physiological traits, especially under drought stress conditions, are very important. The objectives of this study were to investigate heritability for important agronomic traits and some physiological characters in a cross between two spring wheat cultivars. The experiment was carried out using different generations (BC1, BC2, F3, ...
منطقه مورد مطالعه در محدوده نقشه زمین شناسی نوده و جنوب استان خراسان رضوی، در فاصله 40 کیلومتری شرق شهرستان گناباد واقع شده است. در این پژوهش با توجه به ویژگی های شکننده محدوده و وجود سطوح شکستگی و برشی فراوان، منطقه از نظر هندسی، دینامیکی،جنبشی و ریخت زمین ساختی مورد بررسی قرار گرفت. راستا و سازوکار گسل ها حاکی از وجود یک زون برشی راست گرد همراه با فشارش می باشد، که می توان سازوکار ترافشارش را...
EVIDENCE OF TANDEM DUPLICATION OF GENES IN A MERODIPLOID REGION OF PNEUMOCOCCAL h!T.UTANTS RESISTANT
A Pneumococcal mutant, sulr-c, resistant to sulfonamides, and three transformants bearing associated d or d+ resistance markers have earlier been reported to be unstable and show distinct patterns and frequencies of segregating stable progeny lacking the c marker. Each of the four stra ins showed a characteristic dosage of the genes involved in the merodiploidy. Complementary strands of DNA's f...
We obtain a general bound on the Turán density of a hypergraph in terms of the number of edges that it contains. If F is an r-uniform hypergraph with f edges we show that π(F) < f−2 f−1 − (1 + o(1))(2r!2/rf3−2/r)−1, for fixed r ≥ 3 and f → ∞. Given an r-uniform hypergraph F , the Turán number of F is the maximum number of edges in an r-uniform hypergraph on n vertices that does not contain a co...
Natural language processing requires exible control of computation on various sorts of constraints such as syntax, semantics, pragmatics. This study aims to propose and verify a new approach that describes a system declaratively with constraints and controls inferences guided by general principles based on probability. This approach is an alternative one against the previous procedural approach...
As the need for timely information on worldwide crop production intensifies the role of remote sensing is becoming more prominent. If agronomic variables related to yield could be reliably estimated from multispectral satellite data, then crop growth and yield models could be implemented for large areas. The objective of this experiment was to develop methods for combining spectral and meteorol...
Platelet-derived growth factor (PDGF), a powerful mitogen and chemoattractant, is composed of two subunits, A and B, which are synthesized by normal megakaryocytes. We have studied the transcriptional regulation of the c-sis/PDGF-B gene in human K562 erythroleukemia cells that have been induced to undergo megakaryoblastic differentiation by treatment with 12-O-tetradecanoylphorbol-13-acetate. U...
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