نتایج جستجو برای: indicating the ocurance spontaneous amphiploid (2n=10x=70

تعداد نتایج: 16077853  

Journal: :به نژادی گیاهان زراعی و باغی 0
ندا فتحی دانشجوی کارشناسی ارشد اصلاح نباتات، گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه کردستان، سنندج ـ ایران قادر میرزاقادری استادیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه کردستان، سنندج ـ ایران هدیه بدخشان استادیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه کردستان، سنندج ـ ایران علی اکبر مظفری استادیار گروه باغبانی، دانشکدۀ کشاورزی، دانشگاه کردستان، سنندج ـ ایران

aegilops triuncialis l. (2n=4x=28; ctctutut) is one of the tetraploid aegilops species harboring valuable genes for resistance to many biotic and abiotic stresses. in the present study the bread wheat cultivars mv17, navid, omid, pishgam, zarin were crossed with an accession of ae. triuncialis and the resulted f1 and f2 (obtained by the selfing of f1 plants) hybrids studied using the convention...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه امام رضا علیه السلام - دانشکده زبانهای خارجی 1393

writing an academic article requires the researchers to provide support for their works by learning how to cite the works of others. various studies regarding the analysis of citation in m.a theses have been done, while little work has been done on comparison of citations among elt scopus journal articles, and so the dearth of research in this area demands for further investigation into citatio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده ادبیات و علوم انسانی 1391

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده ادبیات 1394

abstract the purpose of this study was to find out the effect of applying the principles of group-dynamic assessment (g-da) on learning of conditional structures in english by iranian efl learners at the intermediate level, which according to the formal educational system in iran, includes students who are in their second year of studying in high schools of koohdasht city. this study was a qua...

Journal: :Cytogenetic and genome research 2005
N Cuñado S Blazquez L Melchor M Pradillo J L Santos

The allohexaploid Aegilops species (2n = 6x = 42), Ae. neglecta 6x (UUXtXtNN), Ae. juvenalis (DcDcXcXcUU), and Ae. vavilovii (DcDcXcXcSsSs) regularly form bivalents at metaphase I. However, in Ae. crassa 6x (DcDcXcXcDD) 0.27 quadrivalents per cell were observed probably as a consequence of the partial homology displayed by the D and Dc genomes. Likewise, the synthetic amphiploid Ae. ventricosa-...

2003

G ENETIC segregation in synthetic allopolyploids of the genus Gossypium has been described in several earlier papers by the author and his colleagues (see GERSTEL and PHILLIPS 1958, for a summary). We had found in that genus that allopolyploids produced from two very closely related species segregated like autopolyploids, i.e. they gave approximately 5: 1 ratios for crosses of the duplex type Z...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

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