نتایج جستجو برای: ratios of genetic variation and environmental variation

تعداد نتایج: 24110272  

عمارت پرداز, جاوید, محرم نژاد, سجاد, محمدزاده جلالی, حسین, نصراله زاده اصل, وحید, ولی زاده, مصطفی, یوسفی, مهری,

Estimation of genetic variation is very important in breeding programs and existing of high genetic variation lead to increase the response to selection. The objective of this study was to investigate genetic variation for agronomic traits and yield components in 12 alfalfa half-sib families. Thirty five individuals of each half-sib family were grown and analyzed basis of completely randomized ...

Journal: :علوم دامی ایران 0
کریم حسن پور دانشجوی ارشد دانشگاه تهران محمد مرادی شهربابک استاد دانشگاه تهران مصطفی صادقی استادیار دانشگاه تهران داود کیانزاد کارشناس ارشد مرکز اصلاح نژاد دام و بهبود تولیدات دامی

to study the effects of environmental factors on milk and fat yields (240day) traits of iranian buffaloes, 22596 and 22165 records were utilized for milk and fat yield traits, respectively. uni and bivariate analysis for estimation of (co)variation components of the traits were done in five lactations. milk yield in the 1st lactation had the highest number of records (4482), collected through c...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده برق و الکترونیک 1390

there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...

Journal: :iran agricultural research 2011
a.s. moucheshi b. heidari a. dadkhodaie

water deficit is an important factor limiting crop growth all over the world. in order to evaluate genetic variation, heritability and the interrelationship between agronomic traits, twenty chickpea genotypes were cultivated in two separated randomized complete block experiments with three replications under normal irrigated and rainfed conditions. the experiments were carried out at the agricu...

Journal: :iranian journal of applied animal science 2013
p. mishra a.s. ali s.v. kuralkar s.p. dixit r.a.k. aggarwal

berari goats are medium sized animals reared mainly for meat purpose. they are predominantly brown and blackish brown in colour with glossy hair and found in vidarbha region of maharashtra state. berari is not a recognized breed but a well established local population of goat which is yet to be fully explored for its phenotypic and genetic aspects. within population genetic variation was examin...

Journal: :poultry science journal 2013
mamizade n ahani azari m zerehdaran s khan ahmadi ar naghavian s

the japanese and english white quails are widespread strains and belongs to the galliformes order, phasianidae family, coturnix genus  and japonica species. these birds are likely to be well-adapted to the hard conditions and resistance to diseases as it has attained economic importance as an agricultural species. in the current study, the genetic variation of japanese and english white  quail ...

ژورنال: :مجله گیاهشناسی ایران 2013
مریم بهروزیان آذرنوش جعفری محمد فارسی

در این مطالعه تنوع ژنتیکی 69 فرد از نه جمعیت طبیعی متعلق به دو گونه dianthus موجود درشمال شرق ایران با استفاده از داده های pard به منظور دستیابی به اطلاعات مهم ژنتیکی بررسی گردید. 111 باند چندشکلی با کمک 11 آغازگر rapd بدست آمد. درصد باندهای چند شکلی، تنوع ژنتیکی نی و اندیس شانون محاسبه گردید. دندروگرام بر اساس روش upgma جمعیتهای مورد بررسی را به دو گروه اصلی مطابق با دو گونه جدا نمود و نزدیکی ...

Journal: :caspian journal of environmental sciences 2007
p. kumaresan r.k. sinha

the genetic variation and diversity among fifty-eight polyvoltine silkworm genotypes was estimated by using ten economic traits. the results revealed that the single shell weight showed higher genetic variation such as pcv% (17.20%), gcv% (12.93%), and heritability (56.5%) followed by single cocoon weight, shell ratio and matured larval weight. the d2 (mahalonobis? distance) statistics revealed...

Journal: :international journal of environmental research 2011
t. arslan v. yilmaz h.k. aksoy

in this study, the effect of environmental concern, attitudes and behaviors of the university students on the environmentally conscious purchasing behavior was investigated with the help of structural equation model (sem). sem is an effective data analysis tool that expresses the complicated causative relations between the latent variables. in this study, we collected the data from 400 univers...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1393

در این مطالعه، محیط کلریمتریک آنتی بیوگرام که در دانشگاه الزهرا طراحی گردیده است با محیط quicolor شرکت سالوبریس آمریکا و محیط مولر هینتون آگار مقایسه گردید. الگوی حساسیت صد جدایه انترو باکتریاسه با شش آنتی بیوتیک مختلف مشخص گردید. توافق هر سه روش با آنالیزکاپا بررسی گردید. با ده بار تکرار تست حساسیت آنتی بیو تیکی دو سوش استاندارد و دو جدایه بالینی از خانواده انتروباکتریاسه، در هر سه محیط مقادیر...

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