نتایج جستجو برای: grains in spike

تعداد نتایج: 16983291  

2017
Juan Manuel Debernardi Huiqiong Lin George Chuck Justin D Faris Jorge Dubcovsky

Wheat domestication from wild species involved mutations in the Q gene. The q allele (wild wheats) is associated with elongated spikes and hulled grains, whereas the mutant Q allele (domesticated wheats) confers subcompact spikes and free-threshing grains. Previous studies showed that Q encodes an AP2-like transcription factor, but the causal polymorphism of the domestication traits remained un...

Journal: :Journal of neurophysiology 2012
Zhiyin Liang Michael A Freed

The retina is divided into parallel and mostly independent ON and OFF pathways, but the ON pathway "cross" inhibits the OFF pathway. Cross inhibition was thought to improve signal processing by the OFF pathway, but its effect on contrast encoding had not been tested experimentally. To quantify the effect of cross inhibition on the encoding of contrast, we presented a dark flash to an in vitro p...

Journal: :Pakistan journal of science 2023


 The major problem in cotton-wheat cropping system is delayed harvesting of cotton which results late planting wheat. Therefore, a field experiment was conducted on relay wheat standing that comprised three different seeding densities (100, 125 and 150 kg ha-1) four seed soaking durations (0, 6, 12 18 hours). designed randomized complete block design with factorial arrangement having repl...

2018
Fan Feng Yunliang Han Shengnan Wang Shaojing Yin Zhenyu Peng Min Zhou Wenqi Gao Xiaoxia Wen Xiaoliang Qin Kadambot H. M. Siddique

Genetic improvements have significantly contributed to wheat production. Five wheat cultivars-widely grown in north China in the 1950s, 1990s, or 2010s-were grown in field experiments conducted in the 2014-2015 and 2015-2016 growing seasons. This study evaluated the genetic progress in wheat grain yield and its related traits in north China and explored how breeding and selection have influence...

Journal: :crop breeding journal 2011
g. najafian a. jafarnejad a. ghandi r. nikooseresht

to identify and characterize bread wheat (triticum aestivum l.) genotypes adapted to terminal water deficit conditions, 51 superior hexaploid wheat genotypes together with commercial check cultivars were studied, in a two stages screening practice, for drought tolerance in karaj, kermanshah, isfahan, neishabour and varamin filed stations under terminal water deficit conditions in 2002-2005 grow...

Journal: :Journal of physiology, Paris 2002
Mark E Nelson

Spike train variability is of fundamental importance for understanding how information is encoded and processed in the nervous system. Most studies in this area have focused on short-term variability, as characterized by the coefficient of variation of the interspike interval distribution. Here we discuss the importance of extending the analysis of spike train variability to longer time scales ...

Journal: :تولید گیاهان زراعی 0

water logging stress is one of the most important factors which affect wheat production particularly in western regions of golestan province. this experiment was carried out in order to evaluate of six genotypes (n-81-18, arta, moghan, n-80-19, urwyt-82-11 and urwyt-82-17) of bread wheat in water logging condition at 2006-2007 growing season in gorgan agricultural research station. the experime...

امام, یحیی, موری , سعید, مقصودی, کبری , کریم‏زاده سورشجانی, هدایت الله ,

Drought stress is the most important factor restricting both growth and crop yield formation under arid and semi-arid conditions. In a field experiment, the effects of foliar application of growth regulators of auxin at three levels (0, 20 and 40 mg/L) and cytokinin at three levels (0, 50 and 70 µmol) at pollination stage on yield and yield components of a bread wheat (Shiraz cultivar) and duru...

ابدالی مشهدی, علی‌رضا, بخشنده, عبدالمهدی, سیادت, سید عطاءا.. , عالمی سعید, خلیل, قاطعی, علی, قرینه, محمدحسین ,

Grain yield of bread wheat (Triticum aestivum L.) is reduced by heat stress, particularly when occurs in reproductive phase, in many countries worldwide, including Iran. In order to study the effects of different levels of nitrogen and cytokinin on wheat yield and yield components at normal and heat stress conditions in Khuzestan, Iran, this research was conducted at Ramin Agriculture and Natur...

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