نتایج جستجو برای: برنج oryza sativa

تعداد نتایج: 25829  

2017
Paloma Koprovski Menguer Raul Antonio Sperotto Felipe Klein Ricachenevsky

Oryza sativa, the common cultivated rice, is one of the most important crops for human consumption, but production is increasingly threatened by abiotic stresses. Although many efforts have resulted in breeding rice cultivars that are relatively tolerant to their local environments, climate changes and population increase are expected to soon call for new, fast generation of stress tolerant ric...

2012
Yaning Zhang

Rice husk and straw are by-products of rice cultivation and processing industry and can be used as an energy source. Proper understanding of the physical properties of rice residues is necessary for utilizing them in thermochemical conversion processes such as gasification and combustion. The physical properties (moisture content, particle size, bulk density and porosity) of rice husks and stra...

2012
Daniel L E Waters Catherine J Nock Ryuji Ishikawa Nicole Rice Robert J Henry

Cultivated rice (Oryza sativa) is an AA genome Oryza species that was most likely domesticated from wild populations of O. rufipogon in Asia. O. rufipogon and O. meridionalis are the only AA genome species found within Australia and occur as widespread populations across northern Australia. The chloroplast genome sequence of O. rufipogon from Asia and Australia and O. meridionalis and O. austra...

Journal: رستنیها 2014
Abdollah Ahmadpour Adel Pordel M. Zhang Mohammad Javan-Nikkhah, Sadi Karami Seyyed Mostafa Jabbarifar T. Tsukiboshi Zeinab Heidarian

In the present study, four species of Bipolaris viz. B. salkadehensis, B. coicis, B. ellisii, and B. maydis and two species of Curvularia viz. C. tuberculata and C. comoriensis were isolated and identified from different poaceousspecies. Bipolaris coicis on Coix lacryma-jobi, B. ellisii on Zea mays, C. tuberculata on Oryza sativa, Sorghum bicolor, Cyperus rotundus and C. comoriensis on Oryza sa...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
Olga F Linares

The African species of rice (Oryza glaberrima) was cultivated long before Europeans arrived in the continent. At present, O. glaberrima is being replaced by the introduced Asian species of rice, Oryza sativa. Some West African farmers, including the Jola of southern Senegal, still grow African rice for use in ritual contexts. The two species of rice have recently been crossed, producing a promi...

Journal: :Current opinion in plant biology 2008
M J Kovach S R McCouch

Plant breeders have long recognized the existence of useful genetic variation in the wild ancestors of our domesticated crop species. In cultivated rice (Oryza sativa), crosses between high-yielding elite cultivars and low-yielding wild accessions often give rise to superior offspring, with wild alleles conferring increased performance in the context of the elite cultivar genetic background. Be...

2016
Fugen Dou Junel Soriano Rodante E. Tabien Kun Chen

The objective of this study was to determine the effects of water regime/soil condition (continuous flooding, saturated, and aerobic), cultivar ('Cocodrie' and 'Rondo'), and soil texture (clay and sandy loam) on rice grain yield, yield components and water productivity using a greenhouse trial. Rice grain yield was significantly affected by soil texture and the interaction between water regime ...

2014
M.Venkata Lakshmi N.Venkata Lakshmi

Seventy genotypes of rice (Oryza sativa L.) were evaluated during Kharif 2012 to study the nature and extent of correlation among yield and yield attributing characters, days to 50 per cent flowering, days to maturity, number of effective tillers per plant, plant height, panicle length, number of grains per panicle, 1000-grain weight, grain yield per plant, kernel length, kernel breadth and L/B...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده کشاورزی 1391

شناسایی نشانگرهای ssr پیوسته با ژن های تحمل به خشکی در لاین های موتانت برنج برنج (oryza sativa) منبع اصلی غذای بیش از یک سوم جمعیت جهان است و پس از گندم دومین غله مهم در دنیاست. نواحی اصلی کشت برنج در ایران(مازندران، گیلان) هر ساله با مشکل تنش خشکی به ویژه در اواخر مرحله گلدهی مواجهند. از این رو ایجاد ارقام متحمل به خشکی و کارا در استفاده از آب ضروری به نظر می رسد. از تکنیک موتاسیون (پرتوتابی...

ژورنال: علوم زراعی ایران 2005
اصفهانی, مسعود, ربیعی, بابک, علی عباسی, حمیدرضا, کاوسی, مسعود,

به منظور تشخیص وضعیت نیتروژن برگ برنج (L. Oryza sativa) رقم خزر و تعیین زمان مناسب مصرف کود نیتروژن به صورت سرک با استفاده از دستگاه کلروفیل‌متر دستی (SPAD) آزمایشی در سال 1382 در خاک‌های سبک و ساحلی استان گیلان در قالب طرح بلوک‌های کامل تصادفی با شش تیمار اجرا گردید. کود نیتروژن از منبع اوره در مقادیر: 40 کیلوگرم (به‌صورت پایه)، 40+40 کیلوگرم (پایه + اواسط پنجه‌زنی)،40+20+20 کیلوگرم (پایه+اواس...

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