نتایج جستجو برای: as compered with diploid plants

تعداد نتایج: 10988316  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1392

a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...

جوهری, سید علی , کلباسی, محمد رضا ,

In order to reduce the adverse effects of sexual maturation on growth and survival of rainbow trout, production possibility of all-female triploid was investigated by means of early heat shock on eggs fertilized by masculinized male’s sperm. Fish ploidy level was determined by erythrocyte size measurement and confirmed by gill nucleolus (NORs) counting as well as chromosome number. Sexual ratio...

Journal: :Plant physiology 2012
Nico De Storme Gregory P Copenhaver Danny Geelen

Whole-genome duplication through the formation of diploid gametes is a major route for polyploidization, speciation, and diversification in plants. The prevalence of polyploids in adverse climates led us to hypothesize that abiotic stress conditions can induce or stimulate diploid gamete production. In this study, we show that short periods of cold stress induce the production of diploid and po...

Journal: :American journal of botany 2012
Bryce A Richardson Justin T Page Prabin Bajgain Stewart C Sanderson Joshua A Udall

UNLABELLED PREMISE OF THE STUDY Hybridization has played an important role in the evolution and ecological adaptation of diploid and polyploid plants. Artemisia tridentata (Asteraceae) tetraploids are extremely widespread and of great ecological importance. These tetraploids are often taxonomically identified as A. tridentata subsp. wyomingensis or as autotetraploids of diploid subspecies tr...

M. Mirzaee M. Sedghi Moghadam M.E. Hassani R. Omidbaigi,

Basil (Ocimum basilicum) is one of the important medicinal plant species. In order to produce an autotetraploid population of basil (Ocimum basilicum) by colchicine, different concentrations (0.00, 0.05, 0.10, 0.20, 0.50 and 0.75%) and four treatment methods were examined (seed, the growing point of seedlings at the emergence of cotyledone leaves stage and emergence of true two type leaves stag...

2013
Mi-Young Chung Jae-Dong Chung Munikote Ramanna Jaap M. van Tuyl Ki-Byung Lim

Intergenomic F1 hybrids between L. auratum x L. henryi and their BC1 progeny were investigated through genomic in situ hybridization technique (GISH) to determine their potential value in lily breeding. We confirmed that F1 intergenomic hybrids possessed a set of chromosomes (x=12) from both parents and that flowers of the F1 auratum × henryi hybrid showed an intermediate morphological phenotyp...

Journal: :چغندرقند 0
مراد جعفری دانش آموخته دکترای دانشگاه تبریز

lepidoteran pests of sugar beet (beta vulgaris l.) cause a severe yield reduction in the most sugar beet growing areas of the world as well as in iran. due to limited genetic resources of resistance to insect pest and polygenic inhertance, improvement of pest resistance in beet by conventional breeding is a difficult task. biotechnological enhancement by introducing insect resistance genes such...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1390

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...

Journal: :Genetics 2003
J T Buchholz A F Blakeslee

Statement of problem and methods employed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 538 Pollen-tube growth in diploid plants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pollen-tube growth in tetraploid plants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tetraploid...

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