THE RELATIVE CONTRIBUTION OF YIELD COMPONENTS TO GRAIN YIELD OF SOME WHEAT CULTIVARS GROWN UNDER DIFFERENT NITROGEN FERTILIZER LEVELS

2010 ◽  
Vol 88 (1) ◽  
pp. 225-239
Author(s):  
FATHY A. ASHMAWY ◽  
MOHAMED S. EL– HABAL ◽  
HANY S. SAUDY ◽  
IMAN K. ABBAS
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilizer ◽  
Yield Components ◽  
Wheat Cultivars ◽  
Relative Contribution

scholarly journals Genome wide identification of QTL associated with yield and yield components in two popular wheat cultivars TAM 111 and TAM 112

2020 ◽  
Author(s):  
Yan Yang ◽  
Smit Dhakal ◽  
Chenggen Chu ◽  
Shichen Wang ◽  
Qingwu Xue ◽  
...  
Keyword(s):  
Grain Yield ◽  
Great Plains ◽  
Yield Components ◽  
Recombinant Inbred Lines ◽  
Wheat Breeding ◽  
Kernel Weight ◽  
Genetic Maps ◽  
Wheat Cultivars ◽  
Thousand Kernel Weight ◽  
Yield And Yield Components

AbstractTwo drought-tolerant wheat cultivars, ‘TAM 111’ and ‘TAM 112’, have been widely grown in the Southern Great Plains of the U.S. and used as parents in many wheat breeding programs worldwide. This study aimed to reveal genetic control of yield and yield components in the two cultivars under both dryland and irrigated conditions. A mapping population containing 124 F5:7 recombinant inbred lines (RILs) was developed from the cross of TAM 112/TAM 111. A set of 5,948 SNPs from the wheat 90K iSelect array and double digest restriction-site associated DNA sequencing was used to construct high-density genetic maps. Data for yield and yield components were obtained from 11 environments. QTL analyses were performed based on 11 individual environments, across all environments, within and across mega-environments. Thirty-six unique consistent QTL regions were distributed on 13 chromosomes including 1A, 1B, 1D, 2A, 2D, 3D, 4B, 4D, 6A, 6B, 6D, 7B, and 7D. Ten unique QTL with pleiotropic effects were identified on four chromosomes and eight were in common with the consistent QTL. These QTL increased dry biomass grain yield by 16.3 g m−2, plot yield by 28.1 g m−2, kernels spike−1 by 0.7, spikes m−2 by 14.8, thousand kernel weight by 0.9 g with favorable alleles from either parent. TAM 112 alleles mainly increased spikes m−2 and thousand kernel weight while TMA 111 alleles increased kernels spike−1, harvest index and grain yield. The saturated genetic map and markers linked to significant QTL from this study will be very useful in developing high throughput genotyping markers for tracking the desirable haplotypes of these important yield-related traits in popular parental cultivars.

scholarly journals Genome wide identification of QTL associated with yield and yield components in two popular wheat cultivars TAM 111 and TAM 112

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0237293
Author(s):  
Yan Yang ◽  
Smit Dhakal ◽  
Chenggen Chu ◽  
Shichen Wang ◽  
Qingwu Xue ◽  
...  
Keyword(s):  
Grain Yield ◽  
Great Plains ◽  
Yield Components ◽  
Recombinant Inbred Lines ◽  
Wheat Breeding ◽  
Kernel Weight ◽  
Genetic Maps ◽  
Wheat Cultivars ◽  
Thousand Kernel Weight ◽  
Yield And Yield Components

Two drought-tolerant wheat cultivars, ‘TAM 111’ and ‘TAM 112’, have been widely grown in the Southern Great Plains of the U.S. and used as parents in many wheat breeding programs worldwide. This study aimed to reveal genetic control of yield and yield components in the two cultivars under both dryland and irrigated conditions. A mapping population containing 124 F5:7 recombinant inbred lines (RILs) was developed from the cross of TAM 112/TAM 111. A set of 5,948 SNPs from the wheat 90K iSelect array and double digest restriction-site associated DNA sequencing was used to construct high-density genetic maps. Data for yield and yield components were obtained from 11 environments. QTL analyses were performed based on 11 individual environments, across all environments, within and across mega-environments. Thirty-six unique consistent QTL regions were distributed on 13 chromosomes including 1A, 1B, 1D, 2A, 2D, 3D, 4B, 4D, 6A, 6B, 6D, 7B, and 7D. Ten unique QTL with pleiotropic effects were identified on four chromosomes and eight were in common with the consistent QTL. These QTL increased dry biomass grain yield by 16.3 g m-2, plot yield by 28.1 g m-2, kernels spike-1 by 0.7, spikes m-2 by 14.8, thousand kernel weight by 0.9 g with favorable alleles from either parent. TAM 112 alleles mainly increased spikes m-2 and thousand kernel weight while TMA 111 alleles increased kernels spike-1, harvest index and grain yield. The saturated genetic map and markers linked to significant QTL from this study will be very useful in developing high throughput genotyping markers for tracking the desirable haplotypes of these important yield-related traits in popular parental cultivars.

Choice of nitrogen fertilizer affects grain yield and agronomic nitrogen use efficiency of wheat cultivars

2018 ◽  
Vol 41 (18) ◽  
pp. 2330-2343
Author(s):  
Mubshar Hussain ◽  
Sardar Alam Cheema ◽  
Rana Qaisar Abbas ◽  
Muhammad Faizan Ashraf ◽  
Muhammad Shahzad ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilizer ◽  
Wheat Cultivars ◽  
Nitrogen Use ◽  
Use Efficiency

scholarly journals Changes in Yield and Yield Components of Wheat Cultivars under Water Stress Condition

2015 ◽  
Vol 9 (5) ◽  
pp. 103-107 ◽  
Author(s):  
Amin Farnia ◽  
Amin Tork
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Water Deficit ◽  
Yield Components ◽  
Block Design ◽  
Irrigation Treatment ◽  
Dry Weight ◽  
Wheat Cultivars ◽  
Water Stress Condition ◽  
Yield And Yield Components

A field experiment was laid out in order to evaluation of effects water stress on yield and yield components of wheat cultivars in Lorestan province in Islamic Azad University, Boroujerd branch, Iran at 2014. The experiment was laid out in a split-plot design based on randomized block design with three replications. Treatments were irrigation in five levels such as 1: four period irrigation after anthesis, 2: three period irrigation after anthesis, 3: two period irrigation after anthesis, 4: one period irrigation after anthesis and 5: control in main plots and  three wheat cultivars (Shiraz, Pishtaz and Bahar) in sub plots.  The results showed that, the effect of water stress, cultivar and interaction between them on all parameters were significant at 1% level. The height of Pishtaz cultivar was taller than other cultivars. The Pishtaz cultivar with one period irrigation after anthesis had the highest number of spike per square and Bahar cultivar with one period irrigation after anthesis had the lowest number of spike per square. However, 1000- grainwas decreased in water deficit treatment.  However, the Pishtaz cultivar with four period irrigation had the highest plant dry weight and grain yield and Bahar cultivar non irrigation treatment after anthesis had the lowest plant dry weight and Shiraz cultivar in non-irrigation treatment had the lowest grain yield. The results showed that yield and yield components of common wheat decreased with increasing of water deficit and for increasing in grain yield of wheat complete irrigation are needed. However, Pishtaz cultivar had a highest grain yield and dry matter production. Then we can increase grain yield and production of wheat with cultivation of Pishtaz cultivar and avoid of water stress.DOI: http://dx.doi.org/10.3126/ijls.v9i5.12707

scholarly journals Nitrogen management alternatives using Azospirillum brasilense in wheat

2019 ◽  
Vol 54 ◽  
Author(s):  
Janete Denardi Munareto ◽  
Thomas Newton Martin ◽  
Glauber Monçon Fipke ◽  
Vinícius dos Santos Cunha ◽  
Guilherme Bergeijer da Rosa
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Yield Components ◽  
Azospirillum Brasilense ◽  
Seed Treatment ◽  
Foliar Application ◽  
Nitrogen Management ◽  
Wheat Cultivars ◽  
Yield And Yield Components ◽  
Management Alternatives

Abstract: The objective of this work was to evaluate nitrogen management alternatives using Azospirillum brasilense inoculation in wheat (Triticum aestivum) by seed and foliar applications. Treatments consisted of the inoculation or not of A. brasilense, via seed and leaves, associated with topdressing with 0, 70, and 140 kg ha-1 nitrogen. Three wheat cultivars were tested: BRS Parrudo, TBIO Quartzo, and TBIO Sinuelo. The experimental design was a randomized complete block, with three replicates. The following traits were evaluated: number of emerged plants, tillers, spikelets per ear, grains per ear, and grains per spikelet; 1,000-grain mass; hectoliter mass; and grain yield. The foliar management of A. brasilense showed a better association with the TBIO Sinuelo cultivar. The foliar application of A. brasilense, whether alone or combined with seed treatment, increases the grain yield and yield components of the evaluated cultivars.

scholarly journals Effect of Sowing Date on Grain Yield and Yield Components of Wheat Cultivars under Dryland Condition

2021 ◽  
Vol 5 (4) ◽  
pp. 574-583
Author(s):  
Galdi Mohammad Bahalkeh ◽  
Abbas Biabani ◽  
Hossein Sabouri ◽  
Hossein Ali Fallahi
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Sowing Date ◽  
Wheat Cultivars ◽  
Yield And Yield Components

scholarly journals Yield components and crop estimation for wheat cultivars at different sowing times

Acta Iguazu ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 62-77
Author(s):  
Lorena Maia Noreto ◽  
Stefanie Lais Kreutz Rosa ◽  
Jorge Luiz Moretti de Souza ◽  
Élcio Silvério Klosowski ◽  
Cláudio Yuji Tsutsumi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Research Center ◽  
Wheat Cultivars ◽  
Crop Evapotranspiration ◽  
Wheat Grains ◽  
Pests And Diseases ◽  
Sowing Dates ◽  
Yield And Yield Components ◽  
Maturation Stages

The objective of this study was to evaluate the yield and yield components of wheat cultivars, and compare the productivity obtained in the field and estimated with Jensen model, at different sowing dates, in Cascavel and Palotina cities, Parana state, Brazil. The experiments were carried out in the field at the COODETEC Research Center, located in Cascavel and Palotina. The experiment was conducted in a randomized blocks design in a 7 × 3 factorial, with plots consisting of six lines spaced at 5 × 0.17 meters, with seven wheat cultivars and three sowing dates, with three repetitions. The pluvial precipitation higher than crop evapotranspiration in all cultivation cycles analyzed did not prevent water deficiencies, which occurred predominantly in the heading and physiological maturation stages. The smallest water deficiencies in Cascavel (31.2 mm; April 22) and Palotina (7.2 mm; March 31), from sowing to heading, reduced grain yield by 41.7% and 42.8%, respectively, in relation to the higher productivity of each location. Small differences in yield components (NEM, NGE and MMG) provide differences in grain yield between the cultivars tested. The sowing carried out at the end of April and in May tended to have a higher yield. The best performances with Jensen model to estimate wheat grains yield were obtained for CD 1440 and QUARTZO cultivars. The Jensen model overestimated the grain yield of the CD 108, CD 1104, CD 150 and CD 154 cultivars, since the model do not consider losses due to excessive rainfall and/or pests and diseases.

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