scholarly journals Investigation On Selection Criteria For Drought Tolerance Of Bread Wheat (Triticum Aestivum L.) In The North-West Turkey

1970 ◽  
Vol 36 (2) ◽  
pp. 291-303
Author(s):  
Oguz Bilgin ◽  
Ismet Baser ◽  
Kayihan Z Korkut ◽  
Alpay Balkan
Keyword(s):  
Drought Tolerance ◽  
Grain Yield ◽  
Plant Height ◽  
Bread Wheat ◽  
Selection Criteria ◽  
First Year ◽  
Water Losses ◽  
Days To Flowering ◽  
Second Year ◽  
Heading Stage

This study was carried out with 27 bread wheat genotypes during two crop seasons. The great variations were determined between first and second year means of genotypes for all characters. The correlation between grain yield and rate of water losses at heading stage, number of stomata and days to flowering in the first year were found significant and negative. The correlation only between grain yield and days to maturity was positive and significant in the second year. The highest direct positive effects on grain yield were computed for plant height in two years. Although rate of water losses at heading stage showed negative direct effect on grain yield in the first year, it influenced the grain yield positively in the second year. It can be concluded that plant height, days to flowering, maturity, and rate of water losses at heading stage might be effective selection criteria for drought tolerance in semi-arid regions, such as Tekirdag. Keywords: Bread wheat; flag leaf area; rate of water loss; glaucousness; stomata; grain yield. DOI: http://dx.doi.org/10.3329/bjar.v36i2.9257 BJAR 2011; 36(2): 291-303

scholarly journals Comparison of Grain Yield and Some Characteristics of Hulled, Durum and Bread Wheat Genotypes Varieties

2017 ◽  
Vol 5 (2) ◽  
pp. 159 ◽  
Author(s):  
Bekir Atar ◽  
Burhan Kara
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
N Uptake ◽  
Grain Protein Content ◽  
First Year ◽  
Wheat Varieties ◽  
Hulled Wheat ◽  
Hulled Wheats ◽  
Negative Effect ◽  
Second Year

In spite of the low grain yield they produce, the hulled wheat have become even more important in recent years because of their resistance to negative environmental conditions and healthy nutritional content. The research was carry out in order to comparison the yield and yield characteristics of durum (Kiziltan-91 and C-1252), hulled (Einkorn and Emmer) and bread wheat (Tir) varieties in Isparta ecological conditions in 2013-14 and 2014-15 vegetation periods. In both years, the highest grain yield was obtained in Kiziltan-91 variety (3992 and 3758 kg ha-1 respectively). The grain yield of hulled wheats in the first year (Einkorn 1269 kg ha-1, Emmer 2125 kg ha-1) was around Turkey averages. However, grain yield decreased of commercial wheat varieties due to the negative effect of high amount of rainfall in June in the second year, but considerably increased in (Einkorn 2150 kg ha-1, Emmer 2533 kg ha-1). N uptake was found to be lower in the than durum wheats. In terms of grain protein content, the highest values were obtained in Emmer variety (16.4%-15.3%).

scholarly journals Genetic Variability, Heritability, and Correlation of Some Agronomical Characters of Soybean Varieties

2018 ◽  
Vol 10 (1) ◽  
pp. 9-15
Author(s):  
Heru Kuswantoro ◽  
Rina Artari ◽  
Wiwit Rahajeng ◽  
Erliana Ginting ◽  
Agus Supeno
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Grain Yield ◽  
Plant Height ◽  
Seed Yield ◽  
Selection Criteria ◽  
Plant Weight ◽  
Days To Flowering ◽  
Days To Maturity ◽  
Number Of Branches

Genetic diversity and inheritance of the traits determine the success of the breeding program. Analysis of genetic variability and heritability assist breeders to decide a strategy and appropriate selection criteria that will be used to repair the desired character. The purpose of this study was to obtain information about genetic diversity, heritability and correlation of nine agronomic characters of soybean varieties. The materials were 16 soybean varieties that arranged in a randomized block design with three replications. The results showed that days to flowering, number of branches per plant, number of reproductive nodes, number of unfilled pods per plant, weight of 100 seeds, and grain yield revealed broad CVG (Genetic Coeffiecient of Variance), whereas the days to maturity, plant height, number of pods per plant had a narrow CVG. CVP (Phenotypic Coeffiecient of Variance) value higher than the value of CVG on all the observed characters with a slight difference, except for grain yield. The broad sense heritability varied from low (seed yield), medium (the number of branches, number of reproductive nodes, number of pods and the number of unfilled pods), and high (days to flowering, days to maturity, plant height, and weight of 100 seeds). Characters of days to flowering and weight of 100 seeds are effectively used as selection criteria because they had a broad CVG and high heritability. Correlation of all yield components to the seed yield was not significant, and negatively correlated to weight of 100 seeds. Variety with higher plant height tended to have a higher number of branches, reproductive nodes and filled pod per plant.

scholarly journals Evaluation of agronomic traits and assessment of genetic variability in some popular wheat genotypes cultivated in Saudi Arabia

2019 ◽  
pp. 847-856 ◽  
Author(s):  
Soleman M. Al-Otayk
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Plant Height ◽  
Bread Wheat ◽  
Coefficient Of Variation ◽  
Agronomic Traits ◽  
Kernel Weight ◽  
Wheat Genotypes ◽  
Days To Heading ◽  
Days To Maturity

The present study was carried out to evaluate agronomic traits and assessment of genetic variability of some wheat genotypes at Qassim region, Saudi Arabia', during 2010/11 and2011/12 seasons. Fourteen wheat genotypes including five bread wheat and nine durum wheat genotypes were evaluated in randomized complete block design with three replications. The genotypes were evaluated for ten different yield contributing characters viz., days to heading, days to maturity, grain filling period, grain filling rate, plant height, number of spikes m-2, kernels spike-1, 1000-kernel weight, grain yield and straw yield. The combined analysis of variance indicated the presence of significant differences between years for most characters. The genotypes exhibited significant variation for all the characters studied indicating considerable amount of variation among genotypes for each character. Maximum coefficient of variation was observed for number of spikes m-2 (17%), while minimum value was found for days to maturity. Four genotypes produced maximum grain yield and statistically similar, out of them two bread wheat genotypes (AC-3 and SD12) and the other two were durum wheat (AC-5 and BS-1). The genotypes AC-3, AC-5 and BS-1 had higher grain yield and stable in performance across seasons. The estimation of phenotypic coefficient of variation in all the traits studied was greater than those of the genotypic coefficient of variation. High heritability estimates (> 0.5) were observed for days to heading, days to maturity, and plant height, while the other characters recorded low to moderate heritability. The high GA % for plant height and days to heading (day) was accompanied by high heritability estimates, which indicated that heritability is mainly due to genetic variance. Comparatively high expected genetic advances were observed for grain yield components such as number of kernels spike-1 and 1000-kernel weight. Grain yield had the low heritability estimate with a relatively intermediate value for expected genetic advance. The results of principle component analysis (PCA) indicated that the superior durum wheat genotypes for grain yield in the two seasons (AC-5 and BS-1) are clustered in group II (Fig. 2). Also, the superior two bread wheat genotypes (AC-3 and SD12) were in group I. Therefore, it could be future breeding program to develop new high yielding genotypes in bread and durum wheat.

scholarly journals Interaction of Different Water Amounts and Phosphorus and Magnesium Doses and Their Effects on Water-Yield Relations of Soybean (Glycine max L.) in Arid Conditions

2011 ◽  
Vol 39 (1) ◽  
pp. 183
Author(s):  
Aise DELIBORAN ◽  
Erdal SAKIN ◽  
Hasan ASLAN ◽  
Ahmet MERMUT
Keyword(s):  
Grain Yield ◽  
Water Consumption ◽  
Irrigation Water ◽  
Water Levels ◽  
Water Yield ◽  
First Year ◽  
Plant Water ◽  
Glycine Max L ◽  
Second Year ◽  
P Fertilizers

This field experiment examined the effects of magnesium (Mg) and phosphorus (P) fertilizers, which were given in different doses to soybean grown in different water levels, on plant water consumption, water-yield relations and grain yield factors. The experiment used a random blocks designed with three consecutive and was conducted over two years 2006 and 2007. Four different P doses (0-4-8-12 kg P da-1) and three different Mg doses (0-4-8 kg Mg da-1) were applied with three different water levels (I1, I2, I3). Cumulative pan values obtained from Class A Pan evaporation pool were applied as irrigation (I) 33% for I1, 67% for I2, 100% for I3. At the end of experiment were determined plant water consumption, water-yield relations and grain yield. At the start of irrigation, 548.00 mm, 786.00 mm and 1 017.00 mm of water were given to I1, I2 and I3 plots, respectively in the first year, and 457.98 mm, 698.02 mm and 931.00 mm irrigation water was given in the second year. Plant water consumption values (ETa) were determined as 648.00 mm, 903.00 mm and 1164.00 mm for I1, I2 and I3 parts in the first year, and 567.00 mm, 825.00 mm and 1070.00 mm in the second year. Moreover, according to experiment plots, irrigation water treatment efficiency (IWTE) varied between 0.14 and 0.53 kg m-3 in the first year and between 0.16 and 0.59 kg m-3 in the second year.

Influence of variety, row type and time of sowing on the morphology, chemical composition and in vitro digestibility of barley straw

1992 ◽  
Vol 118 (2) ◽  
pp. 165-173 ◽  
Author(s):  
B. S. Capper ◽  
G. Sage ◽  
P. R. Hanson ◽  
A. H. Adamson
Keyword(s):  
Chemical Composition ◽  
Linear Regression ◽  
Grain Yield ◽  
Plant Height ◽  
Spring Barley ◽  
Barley Straw ◽  
In Vitro Digestibility ◽  
Regression Equations ◽  
Days To Flowering ◽  
Straw Quality

SUMMARYLeaf proportions (LP) were determined in spring barley straws harvested at Cambridge in 1984 and 1985. Linear regression equations showed that a greater number of days to flowering increased LP whilst greater plant height decreased LP in spring barley straws. Plant height accounted for more than 70% of the variance in LP. By contrast, grain yield and stem diameter accounted for only a small percentage of the variance in LP. Straws from two-rowed winter barleys had slightly higher LP than six-rowed winter barleys but LP in winter and spring barleys were similar.Leaf blade and leaf sheath fractions of the straws had lower acid detergent fibre and lignin contents and were more digestible than the stem fractions. Linear regression equations of straw digestibility in spring barleys on LP, grain yields, days to flowering and plant heights showed that LP accounted for a higher percentage of the variance in digestibility in 1984 than the other characteristics. In 1985, when harvesting conditions were unusually wet, grain yield accounted for the highest percentage of the variance in straw digestibility.There were no differences in chemical composition and straw digestibility between two-rowed and six-rowed barleys, but winter barleys had higher straw digestibility than spring barleys. Date of sowing did not influence straw quality in two-rowed winter barleys.The ranking of two-rowed spring barleys for LP, chemical composition and digestibility suggested that varieties with consistently better straw quality could be identified.

scholarly journals Response of the Most Promising Wheat Genotypes with Different Nitrogen Levels

2017 ◽  
Vol 4 (4) ◽  
pp. 489-497
Author(s):  
N. Rawal ◽  
D. Chalise ◽  
N. Khatri
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Limiting Factor ◽  
First Year ◽  
Wheat Genotypes ◽  
Ecological Zones ◽  
Nitrogen Levels ◽  
Silty Loam ◽  
Second Year ◽  
Plot Design

Field experiments were conducted during winter seasons of 2013 and 2014 on the alkaline and silty loam soils of NWRP, Bhairahawa to study the interaction of the most promising wheat genotypes with different nitrogen levels under different agro-ecological zones and recommend the appropriate dose of nitrogen for newly released varieties. The experiment was laid out in split plot design: four nitrogen levels (0, 50, 100 and 150 kg/ha) as a whole plot and six wheat genotypes (BL 3623, BL 3629, BL 3872, NL 1008, NL 1055 and Vijay) as a sub-plot which were replicated three times. There was significant effect of varieties and nitrogen levels on plant height, number of spikes, thousand grain weight and grain yield in both the years. In first year, the highest grain yield of 3.35 t/ha was obtained from the application of nitrogen @ 150 kg/ha with the genotype BL 3872 which is followed by the genotypes BL 3623 (3.15 ton/ha) and NL 1055 (3.05 ton/ha). Similarly in second year, the genotype NL 1055 gave the highest grain yield of 4.01 ton/ha followed by genotypes BL 3629 (3.83 ton/ha) and BL 3623 (3.81 ton/ha) from the application of nitrogen @ 150 kg/ha. Based on two years results, it can be concluded that N was a limiting factor in the productivity of wheat. Nitrogen @ 150 kg per ha produced higher yield and yield attributing characters. Similarly, the wheat genotypes NL 1055, BL 3629, BL 3623 and BL 3872 were superior among the genotypes.

scholarly journals Evaluation of exotic oat (Avena sativa L.) varieties for forage and grain yield in response to different levels of nitrogen and phosphorous

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12112
Author(s):  
Hamida Bibi ◽  
Suleman Hameed ◽  
Mudassar Iqbal ◽  
Amal Al-Barty ◽  
Hadeer Darwish ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Block Design ◽  
Nitrogen And Phosphorus ◽  
Days To Flowering ◽  
Days To Maturity ◽  
Biological Yield ◽  
Number Of Leaves ◽  
The University ◽  
P Fertilizers

A field experiment was conducted during the Rabi season 2017–2018 (October–March) at the University of Agriculture, Peshawar research farm to examine the influence of different nitrogen (N) and phosphorus (P) levels on two different oat varieties: Australian and Ukrainian. The treatments included control and three levels of nitrogen and phosphorus at 30, 60, and 90 kg ha−1. The treatments were arranged in randomized complete block design (RCBD) and replicated three times. The findings showed that the oat varieties were significantly different from one another in yield and yield parameters. The Australian variety recorded higher emergence (49 plants m−2), days to emergence (15 days), days to flowering (122 days), days to maturity (145 days), plant height (142.7 cm), number of leaves (6.03 leaves plant−1), number of tillers (92.2 tillers m−1), biological yield (8,179.2 kg ha−1), and grain yield (3,725.6 kg ha−1) than the Ukrainian variety. Similarly, different N and P levels, the maximum days to emergence, days to flowering, and days to maturity were recorded in a control plot. The application of 105 kg N + 90 kg P ha−1 was statistically similar to the application of 105 kg N + 60 kg P ha−1. Maximum emergence (60 plants m−2), number of leaves (7.0 leaves plant−1), plant height (118.6 cm), number of tillers m−1 (102.6), biological yield (9,687.5 kg ha−1), and grain yield (4,416.7 kg ha−1) were determined in Australian variety. Based on the findings of this study, the Australian variety performed better in terms of yield and yield components and the application of N and P fertilizers at the rate of 105 kg N + 60 kg P ha−1 produced the best results in both oat varieties.

scholarly journals Assessment of high yielding local Pakistani bread wheat genotypes for improved chapati making quality

2020 ◽  
Vol 5 (3) ◽  
pp. 1
Author(s):  
Jabeen Farheen ◽  
Farzana Nasir Naqvi
Keyword(s):  
Grain Yield ◽  
Protein Content ◽  
Plant Height ◽  
Bread Wheat ◽  
Harvest Index ◽  
Flag Leaf ◽  
Block Design ◽  
Sds Page ◽  
Glutenin Protein ◽  
And Cluster Analysis

The experiment was conducted to classify the maximum glutenin protein possessed Pakistani bread wheat genotype for superlative chapati making quality by ten yield-related parameters. The studied germplasm was acquired from NARC, Pakistan, and planted in randomized-complete-block-design with four replicates at the screen house of the Genetics Department. Data were assessed via Duncan’s test, correlation analysis, SDS-PAGE, and cluster analysis. Duncan’s test conceded that Pirsabak-85 had the highest plant height, flag leaf area, biomass, grain yield plantˉ1, harvest index, and protein content. While, the correlation studies showed that plant height, tillers plantˉ1 (r = 0.649), fertile tillers plantˉ1 (r = 0.713),biomass (r = 0.861), spike length (LS), thousand-grain weight and harvest index had a positive higher significant association with grain yield plantˉ1. The SDS-PAGE analysis resolved 30 diverse high and low molecular weight bands, ranging from 200 kDa to 28 kDa glutenin subunits. Among genotypes, Pirsabak-85 showed maximum protein content and 10 Glu-1 scores. The dendrogram analysis revealed that Pirsabak-85 associated with cluster-II, which was a major and most diverged cluster. The Pirsabak-85 can be utilized to enhance bread wheat production and better chapati making quality

scholarly journals Evaluation of Grain Yield, Agronomical Traits and Drought Tolerance Indices in Some Bread Wheat Cultivars

2019 ◽  
Vol 11 (32) ◽  
pp. 11-21
Author(s):  
ali eftekhari ◽  
amin baghizadeh ◽  
rooholah abdshahi ◽  
mohamad mehdi yaghubi ◽  
◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Grain Yield ◽  
Bread Wheat ◽  
Wheat Cultivars ◽  
Drought Tolerance Indices ◽  
Tolerance Indices ◽  
Agronomical Traits
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