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Application of AMMI for Grain Yield Stability Analysis in Large Speckled Bean Genotypes Grown in Midlands of Bale Zone
Tadele Tadesse,
Gashaw Sefera,
Belay Asmare,
Amanuel Teklaign
Issue:
Volume 3, Issue 3, September 2018
Pages:
17-21
Received:
3 September 2018
Accepted:
14 September 2018
Published:
15 October 2018
Abstract: Genotypes–environment interaction was studied for grain yield of seventeen large speckled bean genotypes at Goro, Ginnir and Dellomena in the midlands of Bale zone for two consecutive years 2016 to 2017 main cropping season. Randomized complete block design with four replications was used for this study. Plot size of 6.4m2 (4 rows at 40cm spacing and 4m long) was used at all the tested locations. Yield stability is one of the setbacks facing plant breeders in developing widely adapted varieties with superior yield. The present study was carried out to investigate theeffect of genotype by environment (GxE) on the yield stability of speckled common bean using seventeen genotypes in six environments (Locations x years combination). The combined analysis of variance for mean grain yield revealed that highly significant variation for year, environment, genotypes, and Genotype by environment interaction. It revealed that 34.16% of the total variation was attributed to environment effect followed by genotypes 11.84%, and genotypes by environment interaction 2.97%. On the other hand the AMMI analysis for the grain yield revealed that 69.75% of the variation was due to environment effect followed by Genotypes (24.18) and GE (6.07%). AMMI 1 component explained 61.64% of the total interaction sum squares whereas AMMI 2 accounted for 38.36% of the variation. Of the tested genotypes G5 and G11 showed consistent stability across the testing environments showing slop value close to unity and deviation from regression near to zero with high mean grain yield. Therefore, these two genotypes were identified as candidate varieties to be verified in the coming cropping season for the possible releases in the midlands of bale zone and similar agro-ecologies.
Abstract: Genotypes–environment interaction was studied for grain yield of seventeen large speckled bean genotypes at Goro, Ginnir and Dellomena in the midlands of Bale zone for two consecutive years 2016 to 2017 main cropping season. Randomized complete block design with four replications was used for this study. Plot size of 6.4m2 (4 rows at 40cm spacing a...
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The Effects of Thermo-Physical Parameters on Free Convective Flow of a Chemically Reactive Power Law Fluid Driven by Exothermal Plate
Damilare John Samuel,
Babatunde Oluwaseun Ajayi
Issue:
Volume 3, Issue 3, September 2018
Pages:
22-34
Received:
28 August 2018
Accepted:
14 September 2018
Published:
22 October 2018
Abstract: In this article, the effects of thermo-physical parameters on free convective flow of a chemically reactive power law fluid driven by exothermal plate is studied. The effect of thermal radiation on the fluid flow is investigated. Also, an exothermal surface reaction modeled by Arrhenius kinetics supplied heat to the power law fluid. Suitable similarity transformations are used to transform the non-linear partial differential equations into system of non-linear coupled ordinary differential equations. The obtained coupled non-linear ordinary differential equations are then solved numerically via fourth-order Runge-Kutta Fehlberg method. A parametric study is performed to illustrate the influence of thermal conductivity parameter, Grashof number, power-law index, velocity exponent parameter, Prandtl number, heat generation parameter, magnetic parameter, Eckert number, radiation parameter, Frank-Kamenetskii parameter, activation energy parameter, Brinkman number, reactant consumption parameter, and suction parameter on the fluid velocity and temperature profiles within the boundary layer. Numerical values of different controlling parameters for local skin friction coefficient and local Nusselt number are obtained and discussed. Comparison of the present work with existing literature was carried out and the results are in excellent agreement. The results also shows that skin friction coefficient decreases with increase in Eckert number, while the rate of heat transfer is enhanced at the surface of the plate as the Eckert number increase.
Abstract: In this article, the effects of thermo-physical parameters on free convective flow of a chemically reactive power law fluid driven by exothermal plate is studied. The effect of thermal radiation on the fluid flow is investigated. Also, an exothermal surface reaction modeled by Arrhenius kinetics supplied heat to the power law fluid. Suitable simila...
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Agronomic Performance and Yield Stability of Large Red Bean Genotypes Using AMMI Model in Midlands of Bale Zone, South-Eastern Ethiopia
Tadele Tadesse,
Gashaw Sefera,
Belay Asmare,
Amanuel Teklaign
Issue:
Volume 3, Issue 3, September 2018
Pages:
35-39
Received:
3 September 2018
Accepted:
17 September 2018
Published:
24 October 2018
Abstract: In order to identify the agronomic performance and yield stability of the large red bean genotypes, sixteen large red bean genotypes were evaluated in the midlands of bale zone at Goro, Ginir and Dellomena for two consecutive years 2016 and 2017 main cropping season. The genotypes were arranged in randomized complete block design with four replications having plot size of 6.4m2 (4 rows at 40cm spacing and 4m long). The analysis of variance revealed that highly significant variation for environment, genotypes and year X Location, whereas GEI (Genotypes by Environment interaction) showed significant variation for mean grain yield. Of the total sum squares of variation observed, 38.33% was accounted for environment followed by genotypes 11.53% and GEI 4.51%. The significant effect of GE interaction reflected on the differential response of genotypes in various environments and demonstrated that GE interaction had remarkable effect on genotypic performance in different environments. The application of AMMI model for partitioning the GE interaction effects showed that only the first two terms of AMMI were significant. In the AMMI analysis, out of the total GEI variation observed, the first AMMI explained 78.28% of the variation whereas 21.72% was accounted for the AMMI2. A combination of high grain yield potential, stabilityparameter of regression coefficient of unity and minimum deviation mean squares from regression identifies G4 as moderately stable genotype with high grain yield deserved to be promoted for possible release as commercial variety for the midlands of Bale zone and similar agro-ecologies.
Abstract: In order to identify the agronomic performance and yield stability of the large red bean genotypes, sixteen large red bean genotypes were evaluated in the midlands of bale zone at Goro, Ginir and Dellomena for two consecutive years 2016 and 2017 main cropping season. The genotypes were arranged in randomized complete block design with four replicat...
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Quality Assessment of Selected Vitamin C Tablets Sold at Bridge Head Market, Onitsha
Issue:
Volume 3, Issue 3, September 2018
Pages:
47-50
Received:
3 September 2018
Accepted:
19 September 2018
Published:
31 October 2018
Abstract: Due to the importance of ascorbic acid in humans, qualitative and quantitative evaluation of ascorbic acid has gained a significant increase in several areas of analytical chemistry such as pharmaceutical analysis. Several analytical methods have been developed. Most of these methods are laborious and some require much reagents that may be either not readily available or are expensive. There is an influx of counterfeit drugs in the market and due to this, two questions come up; are we underdozed? Or overdozed? This is a research on the quality of selected brands of Vitamin C tablets. In this research work, five brands of Vitamin C tablets were purchased at Bridge head market, Onitsha and were analyzed for their percentage content of Ascorbic Acid (active pharmaceutical product), their average percentage friability, disintegration time and hardness using a UV/Vis spectrophotometer, friabilator, disintegration tester and hardness tester. The results showed that they all passed the hardness and disintegration time test. Samples 1, 3, 4, and 5 failed the test for the percentage content of Ascorbic acid; Sample 2 failed the friability test. Sample 2 has proven to have the highest quality and would be able to enact action faster since it has the highest quantity of Ascorbic acid that will be disintegrated at any time and this also means that it will be absorbed into the blood stream faster.
Abstract: Due to the importance of ascorbic acid in humans, qualitative and quantitative evaluation of ascorbic acid has gained a significant increase in several areas of analytical chemistry such as pharmaceutical analysis. Several analytical methods have been developed. Most of these methods are laborious and some require much reagents that may be either n...
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