scholarly journals Evaluation of Relative Efficiency of Alpha Lattice Design and Cluster Analysis of Twenty Spring Triticale Field Experiments

2020 ◽  
Author(s):  
R. N.F. Abdelkawy ◽  
A. Z. Turbayev ◽  
A. A. Soloviev
Keyword(s):  
Cluster Analysis ◽  
Relative Efficiency ◽  
Field Experiments ◽  
Field Trials ◽  
High Yield ◽  
Agricultural Field ◽  
Lattice Design ◽  
Spring Triticale ◽  
And Cluster Analysis ◽  
1000 Grain Weight

Twenty genotypes triticale were evaluated in an alpha lattice design and RCBD for eight characters to a comparison of the relative efficiency (RE) of alpha-lattice design and RCBD. Two experiments were analyzed according to alpha lattice design and RCB design. Average estimated (RE) was 12.97, 5.93, 21.79, 35.50, 21.53, 23.96 and 26.69% for number of plants / m2, tillering fertility, plant height (cm), spike length (cm), number of spikelets / spike, 1000-grain weight (g) and grain yield (g / m2), respectively, the high precision is obtained significantly to estimate treatment effects indicating that using an alpha lattice design in place of RCBD. Mean comparisons for both RCBD and alpha lattice design were performed and two designs confirmed to Dublet, Ulyana, 131/1656 and C259 genotypes were the highest yield (g / m2). Cluster analysis showed that genotypes were isolated into three principle groups and one of these contains one variety (Dublet). This variety was characterized by a high yield over two years. The results showed that alpha lattice more efficient and it can be used it instead of traditional RCB design in the agricultural field trials.

scholarly journals Efficiency of Alpha Lattice Design in Rice Field Trials in Pakistan

2010 ◽  
Vol 3 (1) ◽  
pp. 91 ◽  
Author(s):  
M. Kashif ◽  
M. I. Khan ◽  
M. Arif ◽  
M. Anwer ◽  
M. Ijaz
Keyword(s):  
Standard Error ◽  
Relative Efficiency ◽  
Rice Field ◽  
Field Experiments ◽  
Field Trials ◽  
Block Designs ◽  
Agricultural Field ◽  
Lattice Design ◽  
Homogeneous Block ◽  
Average Standard Error

Two rice trials were conducted from 2005 to 2006 in rice research institute, Kala Shah Kako Pakistan to evaluate the efficiency of alpha lattice design in field experiments. The average standard error of difference between genotypes mean is used to calculate relative efficiency of alpha lattice design. Both experiments clearly identified the advantages of small blocks. The average gain in efficiency was 119% with maximum 128%. Mean ranks comparison for both randomized complete block and alpha lattice design were performed. It was observed that the ranks were not constant across the experiments. The results emphasize that the traditional randomized complete block designs (RCBD) should be replaced by alpha lattice in the agricultural field experiments when number of varieties to be tested in an experiment increases to more than five or ten. In such a situation finding a homogeneous block is quite difficult in field experiments.Keywords: Rice; Alpha lattice design; RCBD; Pakistan.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i1.4773                 J. Sci. Res. 3 (1), 91-95 (2011)

Enhancement of dwarf wheat germplasm with high-yield potential derived from induced mutagenesis

2016 ◽  
Vol 16 (1) ◽  
pp. 74-81 ◽  
Author(s):  
Hongchun Xiong ◽  
Huijun Guo ◽  
Yongdun Xie ◽  
Linshu Zhao ◽  
Jiayu Gu ◽  
...  
Keyword(s):  
Yield Components ◽  
Field Experiments ◽  
Wheat Breeding ◽  
Grain Weight ◽  
Yield Potential ◽  
High Yield ◽  
Dwarfing Genes ◽  
Biosynthetic Genes ◽  
Specific Pcr ◽  
1000 Grain Weight

AbstractThe dwarfing wheat (Triticum aestivum L.) breeding has promoted a dramatic increase in yields. Since the utilized dwarfing genes in wheat are very limited, identification of novel dwarfing genes is necessary for improving the genetic diversity of wheat. In this study, more than 300 dwarfing wheat lines from induced mutation were screened by kompetitive allele-specific PCR and gibberellin (GA) treatment. The 17.49% of Rht-D1b and 1.37% of Rht-B1b dwarfing mutants were identified in this mutant group. Additionally, Rht-D1b mutants showed more effective in reduction of plant height and higher 1000-grain weight comparing with that of Rht-B1b mutants. By combing with comparison of yield components and expression profile of GA biosynthetic genes with wild-type, the GA-responsive mutant dm15 without directly involvement in GA metabolism, significantly increased 1000-grain weight but no change of other yield components in two locations of field experiments. Meanwhile, another elite mutant dm11 with change of GA biosynthetic genes expression was also identified. These mutants will be promising candidates for dwarfing wheat breeding.

scholarly journals Characterization of Morphological and Fruit Quality Traits of Coconut (Cocos nucifera L.) Germplasm

HortScience ◽  
2021 ◽  
pp. 1-9
Author(s):  
Ruining Zhang ◽  
Hongxing Cao ◽  
Chengxu Sun ◽  
Jerome Jeyakumar John Martin
Keyword(s):  
Cluster Analysis ◽  
Cocos Nucifera ◽  
Principal Component ◽  
Fruit Weight ◽  
High Yield ◽  
Germplasm Resources ◽  
New Varieties ◽  
And Cluster Analysis ◽  
Cocos Nucifera L ◽  
Fruit Flavor

The evaluation and identification of germplasm resources is an indispensable step in the breeding processes and have important roles in the selection and improvement of new varieties. This research intended to characterize coconut germplasm to determine the quantitative, qualitative, and morphological traits of the stem, leaf, and inflorescence and the fruit characteristics. Sixteen morphological and qualitative traits of 17 coconut (Cocos nucifera L.) germplasm resources from Hainan, China, were investigated to determine the characteristics and advantages of multiple germplasm lines to create the foundation for the cultivation and breeding of coconuts. The results of the correlation analysis, principal component analysis (PCA), and cluster analysis indicate a correlation between coconut germplasm factors and their contribution to coconut traits. The results revealed that stem girth at 0.2 m was the most obvious trait, along with the fruit flavor, edible rate, fat content, hole spacing, single fruit weight, and number of female flowers, which reflect most of the information regarding coconut traits and contribute to its value. The PCA and cluster analysis indicated that two high-yield and superior-quality sweet water dwarf coconut germplasms, named ‘15-19’ and ‘15-17’, were suitable for cultivation and production in Hainan, China. The results of this study act a far-reaching influence on the collection and utilization of coconut resources and have an impact on the development and progress of the coconut industry in China.

scholarly journals Effect of Dwarfing Gene Ddw1 on Height and Agronomic Traits in Spring Triticale in Greenhouse and Field Experiments in a Non-Black Earth Region of Russia

Plants ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 131 ◽  
Author(s):  
Pavel Kroupin ◽  
Anastasiya Chernook ◽  
Gennady Karlov ◽  
Alexander Soloviev ◽  
Mikhail Divashuk
Keyword(s):  
Field Experiments ◽  
Agronomic Traits ◽  
Grain Weight ◽  
Spike Density ◽  
Dwarfing Gene ◽  
Winter Triticale ◽  
Spring Triticale ◽  
1000 Grain Weight ◽  
New Crop

Triticale is a relatively new crop which still possesses serious drawbacks that can be significantly improved by breeding. The dwarfing genes proved to be very useful in the development of new lodging resistant and productive cultivars of winter triticale. The aim of our research was to assess the effect of the Ddw1 dwarfing gene from rye on the agronomic valuable traits in spring triticale. The Ddw1 effect was studied in the greenhouse experiment in segregating the F2:3 population and in the field of F3:4 and F4:5 families derived from crossing winter triticale ‘Hongor’ (Ddw1Ddw1) and spring triticale ‘Dublet’ (ddw1ddw1). As a result, in all three generations, a strong decrease in plant height was demonstrated that was accompanied by a decrease in grain weight per spike and 1000-grain weight. In field experiments, a decrease in spike length and increase in spike density and delay in flowering and heading were observed. As a result of decrease in culm vegetative weight due to Ddw1, the harvest index measured in F4:5 increased. The spike fertility and number of grains were not affected by Ddw1. The comparison of Ddw1 in rye, winter, and spring triticale, and the possible role of Ddw1 in improving spring triticale are discussed.

PRACTICAL USE OF NEIGHBOR METHODS AND ALTERNATIVES IN THE ANALYSIS OF FIELD TRIALS

1987 ◽  
Vol 67 (2) ◽  
pp. 477-489 ◽  
Author(s):  
M. R. BINNS
Keyword(s):  
Field Data ◽  
Field Experiments ◽  
Field Trials ◽  
Covariance Analysis ◽  
Standard Methods ◽  
Designed Experiments ◽  
Fertility Trends ◽  
Lattice Design ◽  
Fertility Trend ◽  
Actual Field

Neighbor methods for the analysis of field experiments are described with the minimum of mathematical detail. Using actual field data, two popular methods are compared with standard blocking, row and column elimination, and covariance analysis. It is shown that simple randomized block analysis is likely to give biased treatment effects when there is a fertility trend. For large experiments, row and column analysis is likely to be inferior to covariance analysis using well-chosen covariates. Neighbor analysis can be more precise than standard methods based on well-designed experiments with appropriate blocking. Situations where neighbor methods may not work well are suggested, but since the methods are easy to use they are recommended when fertility trends are suspected and a simple detective tool is required.Key words: Neighbor analysis, covariate analysis, lattice design, fertility trends

scholarly journals Relative Abundance and Field Efficacy of Insecticides and Bio-control Agents Against Stem Borer Species in Rice (Oryza sativa L.)

2021 ◽  
Author(s):  
T. Sharmitha ◽  
C. Gailce Leo Justin ◽  
S. Sheeba Joyce Roseleen
Keyword(s):  
Field Experiments ◽  
Insect Pests ◽  
Oryza Sativa L ◽  
Stem Borer ◽  
Field Trials ◽  
Control Agent ◽  
High Yield ◽  
Seasonal Incidence ◽  
Yellow Stem Borer ◽  
Highly Effective

Background: In India, out of the total loss incurred by different insect pests of paddy, 25 to 30 per cent damage is done by stem borer alone. Many conventional insecticides though have been evaluated against stem borers, yet, most of the chemicals have failed to provide adequate control. Hence, the present study aimed to evaluate the efficacy of some newer molecules of insecticides and bio-control agents.Methods: Field trials were conducted to record the seasonal incidence and to evaluate the efficacy of insecticides and bio-control agents against the stem borer species in rice during Kharif and Rabi. Result: Field experiments revealed that during Kharif 2018, chlorantraniliprole 18.5 SC was highly effective with 92.98 and 91.24 per cent reduction of stem borer infestation over control at vegetative and reproductive stages, respectively and recorded a high yield of 5720 kg/ha followed by spinetoram 11.7 SC with 83.16 and 80.82 per cent reduction of stem borer over control at vegetative and reproductive stages, respectively. During Rabi 2019, spinetoram 11.7 SC was highly effective with 92.36 and 93.73 per cent reduction of stem borer infestation over control at vegetative and reproductive stages respectively and recorded a high yield of 4570 kg/ ha, followed by chlorantraniliprole 18.5 SC with 84.60 and 91.48 per cent reduction of stem borer at vegetative and reproductive stages, respectively. The difference in the efficacy of insecticides during Khaif, 2018 and Rabi, 2019, might be due to shift in the species occurrence of stem borer, with a dominant occurrence of yellow stem borer (80.61%) in Kharif 2018 and pink stem borer (70.00%) in Rabi, 2019. The bio-control agent Trichogramma japonicum exerted minimum reduction of stem borer with a low grain yield of 3946.6 kg/ha.

scholarly journals Evaluation of wheat genotypes (Triticum aestivum L.) for assessment of character association, path coefficient and cluster analysis

2018 ◽  
Author(s):  
Anuj Kumar ◽  
Shailendra Singh Gaurav ◽  
Tejbir Singh ◽  
Ravi Singh Thapa
Keyword(s):  
Cluster Analysis ◽  
Plant Height ◽  
Flag Leaf ◽  
Triticum Aestivum L ◽  
Spike Length ◽  
Path Coefficient ◽  
Cluster Distance ◽  
Biological Yield ◽  
And Cluster Analysis ◽  
1000 Grain Weight

Thirty wheat genotypes (Triticum aestivum L.) were evaluated for 11 morphological and yield trait for analysis of character association (phenotypic and genotypic correlation coefficient), path analysis and cluster analysis. The experiment was conducted during rabi seasons of 2014-2015 in a randomized block design with three replication. Days to 50% heading showed positive and significant correlation with flag leaf area and number of spiklet per ear; flag leaf area showed positive and significant correlation with 1000 grain weight; Plant height showed positive and significant correlation with spike length; spike length showed positive and significant correlation with 1000 grain weight. Phenotypic path analysis showed biological yield and number of grain per spike had highly positive and direct effect on grain yield. Direct and highly positive effect on grain yield was shown by number of productive tillers, plant height, spike length, number of spikelet per spike genotypic path coefficient. Biological yield and grains yield per plant show highly positive and direct effect on yield with number of productive tillers, plant height, number of spikelet per spike and spike length. In cluster analysis the intra cluster distance ranged from 1.61 (cluster II) to 2.37 (cluster III and VI ). Thus the member of cluster II were least divergent and similarly the member of cluster III and IV were most divergent The maximum inter cluster distance was between cluster II and III followed by cluster IV and V , cluster VI and III and cluster VI and V that order therefore the accessions grouped in the five pair of cluster may be considered as most divergent.

The limit of the contemporary financial system in Russia

2020 ◽  
Vol 16 (7) ◽  
pp. 1223-1245
Author(s):  
V.V. Smirnov
Keyword(s):  
Cluster Analysis ◽  
Foreign Currency ◽  
Financial System ◽  
Descriptive Statistics ◽  
High Tech ◽  
Monetary Aggregate ◽  
Internal System ◽  
Monetary Relations ◽  
And Cluster Analysis ◽  
Structural Preservation

Subject. The article focuses on the modern financial system of Russia. Objectives. I determine the limit of the contemporary financial system in Russia. Methods. The study is based on methods of descriptive statistics, statistical and cluster analysis. Results. The article shows the possibility of determining the scope of the contemporary financial system in Russia by establishing monetary relations as the order of the internal system and concerted operation of subsystems, preserving the structure of the financial system, maintaining the operational regime, implementing the program and achieving the goal. I found that the Russian financial system correlated with the Angolan one, and the real scope of the contemporary financial system in Russia. Conclusions and Relevance. As an attempt to effectively establish monetary relations and manage them, the limit of the contemporary financial system is related to the possibility of using Monetary Aggregate M0 to maintain the balance of the Central Bank of Russia. To overcome the scope of Russia’s financial system, the economy should have changed its specialization, refocusing it on high-tech export and increasing the foreign currency reserves. This can be done if amendments to Russia’s Constitution are adopted. The findings expand the scope of knowledge and create new competence in the establishment of monetary relations, order of the internal system and concerted interaction of subsystems, structural preservation of the financial system and maintenance of its operational regime.

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