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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 2
First page : (22) Last page : (30)
Article doi: http://dx.doi.org/10.18782/2320-7051.2674

Evaluation of Source and Sink Physiological Limitation on Grain Yield and Some Agronomic Traits in Promising Bread Wheat Genotypes

Nayyer Azimzadeh1, Gholamreza Khalilzadeh2 and Ali Reza Eivazi2*
1Master of Sciences in Plant Breeding, Department of Plant Breeding and Biotechnology, Urmia University, Iran
2Assistant Professor of Seed and Plant Improvement Research Department, West Azerbaijan Agricultural and Natural Resources Research and Education Center, AREEO, Urmia, Iran
*Corresponding Author E-mail: alirezaeivazi@yahoo.com
Received: 12.03.2017  |  Revised: 20.03.2017   |  Accepted: 23.03.2017  


In order to study of sink and source limitation and determine of remobilization of dry matter in 20 bread wheat genotypes including three modern cultivars (Urum, Zare and Mihan) and 17 promising genotypes, two field experiments were conducted in Agricultural Research Station of Miandoab in West Azerbaijan during 2012-2013 and 2013-2014 cropping seasons. The genotypes were evaluated in a randomized complete block design with three replications. Treatments of control, flag leaf removal and removal half of each spike was applied in order to study of sink-source limitation in normal condition. Flag leaf removal and removing of the rest leaves (source limitation) decreased grain yield by an average of 25% and 8% respectively. Removal of flag leaf had more affected on grain yield, biological yield, 1000 grain weight and source limited. Removal half of Spikelet per spike (sink limitation) increased grain weight in C-89-8, C-89-14 and Mihan genotypes. Low sink and source limitation was shown in C-89-4, C-89-10 and C-89-14. These genotypes showed the highest grain yield because of more seed per spike, high TKW. Average means of source limitation (34.5%) was more than sink limitation (16.3%) in this genotypes. Positive significant correlation showed between remobilization of dry matter with grain yield (r=0.564, P<0.01) and 1000 kernel weight (r=0.446, P<0.05). The negative correlation of grain yield with kernel weight, seed per kernel and remobilization of dry matter indicated this trait can be used for identifying of high yield potential in bread wheat genotypes

Key words: Grain yield, sink-source limitation, wheat genotypes

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Azimzadeh, N., Khalilzadeh, G. and Eivazi, A.R., Evaluation of Source and Sink Physiological Limitation on Grain Yield and Some Agronomic Traits in Promising Bread Wheat Genotypes, Int. J. Pure App. Biosci.5(2): 22-30 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2674