scholarly journals Sequential Path Analysis for Determination of Relationship Between Yield and Yield Components in Bread Wheat (Triticum aestivum.L.)

2014 ◽  
Vol 6 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Mohtasham MOHAMMADI ◽  
Peyman SHARIFI ◽  
Rahmatollah KARIMIZADEH
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Plant Height ◽  
Canopy Temperature ◽  
Correlation Coefficients ◽  
Early Growth ◽  
Spike Length ◽  
Lattice Design ◽  
Growth Vigor ◽  
Positive Direct

An experiment was conducted to evaluate 295 wheat genotypes in Alpha-Lattice design with two replications. The arithmetic mean and standard deviation of grain yield was 2706 and 950 (kg/ha),respectively. The results of correlation coefficients indicated that grain yield had significant and positive association with plant height, spike length, early growth vigor and agronomic score. Whereas there were negative correlation coefficients between grain yield and days to physiological maturity and canopy temperature before and during anthesis. Path analysis indicated agronomic score and plant height had high positive direct effects on grain yield, while canopy temperature before and during anthesis, and days to maturity, wes another trait having negative direct effect on grain yield. The results of sequential path analysis showed the traits that accounted as a criteria variable for high grain yield were agronomic score, plant height, canopy temperature, spike length, chlorophyll content and early growth vigor, which were determined as first, second and third order variables and had strong effects on grain yield via one or more paths. More important, as canopy temperature, agronomic score and early growth vigor can be evaluated quickly and easily, these traits may be used for evaluation of large populations.

scholarly journals GENETIC VARIABILITY, CHARACTER ASSOCIATION AND PATH ANALYSIS OF YIELD AND ITS COMPONENT TRAITS IN MAIZE (Zea mays L.)

2016 ◽  
Vol 29 (1) ◽  
pp. 21-30
Author(s):  
M. N. Huda ◽  
M. S. Hossain ◽  
M. Sonom
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Path Analysis ◽  
Plant Height ◽  
Direct Effect ◽  
Coefficient Of Variation ◽  
Block Design ◽  
Male Flower ◽  
Maize Genotypes ◽  
Positive Direct

The experiment was conducted in the experimental area of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during March to June, 2014 to study the genetic variability, correlation and path co-efficient analysis for yield and yield contributing characters of maize. In this experiment 25 maize genotypes were used as experimental materials. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Mean performance, variability, correlation matrix and path analysis on different yield contributing characters and yield of maize genotypes were estimated. The highest grain yield/plant (272.21 g) was recorded in the genotype of BARI Hybrid Maize-6, whereas the lowest grain yield/plant (180.40 g) from the genotype of NZ-003. Phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all the yield contributing traits. In correlation study, significant positive association was recorded for grain yield/plant of maize genotypes with plant height (0.235), tassel height (0.359), number of grains/cob (0.854), cob length (0.390), cob diameter (0.313) and weight of 1000-grains (0.689). Path analysis revealed that days to initiation of male flower had positive direct effect (0.132), days to initiation of female flower had negative direct effect (-0.254), days to maturity had positive direct effect (0.178), plant height had positive direct effect (0.314), tassel height had positive direct effect (0.234), ear length had positive direct effect (0.197), number of grains/cob had negative direct effect (-0.095), cob length had positive direct effect (0.167), cob diameter had positive direct effect (0.168) and that weight of 1000-grains had positive direct effect (0.217) on yield / plant.

scholarly journals Morphological characterization and genetic analysis in bread wheat germplasm: A combined study of heritability, genetic variance, genetic divergence and association of characters

2020 ◽  
Vol 12 (4) ◽  
pp. 301-311
Author(s):  
G. Gerema ◽  
D. Lule ◽  
F. Lemessa ◽  
T. Mekonnen
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Bread Wheat ◽  
Analysis Of Variance ◽  
Coefficient Of Variation ◽  
Grain Filling ◽  
Path Coefficient ◽  
Wheat Genotypes ◽  
Lattice Design ◽  
Positive Direct

Abstract. The present study was conducted to assess the nature and magnitude of genetic variability and traits association of bread wheat genotypes for yield and related traits. A total of 180 genotypes were evaluated in alpha lattice design with three replications in 2017/18 cropping season. Data for 10 quantitative traits were collected and subjected to analysis of variance. The result from the analysis of variance revealed highly significant variability observed among genotypes for all traits studied. Phenotypic coefficient of variation (PCV) is superior over genotypic coefficient of variation (GCV) for most traits but narrow variations were found between PCV and GCV for most of the traits. Heritability in broad sense and genetic advance as percent of the mean (GA%) were relatively higher for Kernels per spike and grain filling period. Grain yield showed positive and highly significant (p≤0.01) association with number of tillers, kernel per spike and plant height both on genotypic and phenotypic levels.The path coefficient analysis showed that spike length, plant height and kernels per spike had positive direct effect on grain yield on both genotypic and phenotypic levels. Divergence analysis (D2) grouped the total test germplasm into 10 clusters. Among those, clusters IV and IX showed the highest genetic distance and thus the possibility to develop segregating populations upon the crossing of widely related genotypes in those clusters. The results could help researches to utilize the most promising wheat genotypes of this study in future breeding programmes for enhancing desirable traits.

scholarly journals Validation of Maize (Zea mays L.) Hybrids for the Study on Variability, Trait Association, and Path Analysis

2021 ◽  
pp. 298-308
Author(s):  
M. Ramesh Kanna ◽  
Hiramani Barman ◽  
Kasireddy Sivasankarreddy ◽  
Dikshita Gogoi ◽  
T. V. Rao ◽  
...  
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Plant Height ◽  
Harvest Index ◽  
Area Index ◽  
Ear Height ◽  
Positive Direct ◽  
Pollen Shed

The present investigation was conducted with nine genotypes in randomized block design during Rabi, 2019-20 at the instructional-cum-research farm, Assam Agricultural University, Jorhat. All the characters exhibited significant genotypic mean squares in analysis of variance except anthesis silking interval, kernel rows per ear and 100 kernel weights. High heritability coupled with high genetic advance was observed for the traits plant height, ear height, ears per plant, ear length, kernels per row, chlorophyll content, leaf area index 60 days after sowing (LAI 60 DAS), LAI 90 DAS, harvest index, grain yield per plant and grain yield per hectare. Significant genetic association of grain yield per plant and grain yield per hectare with days to 50% pollen shed, days to 50% silk, days to 100% dry husk, ear height, kernels per row, LAI 60DAS and LAI 90 DAS. Genotypic path analysis revealed that the characters, days to 50% silk, days to 100% dry husk, plant height, ears per plant, ear diameter and harvest index had the highest positive direct effects on grain yield per hectare while days to 50% pollen shed and ear height had the highest negative direct effect on grain yield per hectare. The hybrids namely, PAC 751, CP 333 and PAC 751 ELITE, were found to be the three best hybrids to possess a high estimate of desirable traits such as days to 50% pollen shed, days to 50% silk, days to 100% dry husk, plant height, ear height, ear diameter, leaf area index at 60 days after sowing, lea area index at 90 days after sowing, grain yield per plant and grain yield per hectare.

scholarly journals Correlation and path coefficient analysis in advanced wheat genotypes

2017 ◽  
Vol 15 (1) ◽  
pp. 1-12 ◽  
Author(s):  
DK Ayer ◽  
A Sharma ◽  
BR Ojha ◽  
A Paudel ◽  
K Dhakal
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Direct Effect ◽  
Harvest Index ◽  
Wheat Crop ◽  
Path Coefficient ◽  
Lattice Design ◽  
Biological Yield ◽  
Level Of Significance ◽  
Positive Direct

A field experiment was conducted in alpha lattice design in subtropical region of Nepal in the wheat crop to determine the association between yield and yield attributing traits through correlation and path analysis. The result showed highly significant variations among the genotypes for all the traits under study. Simple correlation coefficients revealed that the association of grain yield with biological yield followed by harvest index, plant height, thousand grain weight and Area Under SPAD Retread Curve (AUSRC) at anthesis were positive and highly significant (at 1% level of significance). The positive and significant (at 5% level of significance) association of grains per spike followed by flag leaf area with grain yield was also found. Path analysis showed that biological yield and harvest index had the highest positive direct effect on grain yield. While other traits contribute to the grain yield significantly indirectly via biological yield and harvest index. This suggests that biological yield and harvest index having significant positive correlation and high direct effect on grain yield explained the true relationship and the direct selection of the genotypes through these traits is effective for improving yield potentiality.SAARC J. Agri., 15(1): 1-12 (2017)

scholarly journals Phenotypic variation and traits interrelationships in bread wheat (Triticum aestivum L.) genotypes in Northern Ethiopia

2021 ◽  
Vol 117 (3) ◽  
pp. 1
Author(s):  
Ahmed GETACHEW ◽  
Fisseha WOREDE ◽  
Sentayehu ALAMEREW
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Phenotypic Variation ◽  
Seed Mass ◽  
Spike Length ◽  
Direct Selection ◽  
Northern Ethiopia ◽  
Lattice Design ◽  
Improvement Programs ◽  
Positive Direct

<p class="042abstractstekst">Information on phenotypic variation helps to breed better varieties. Forty-nine bread wheat genotypes were evaluated in simple lattice design at Jamma and Geregera to determine the extent of variation and association among 11 traits. Analysis of variance showed significant differences (<em>p </em>&lt; 0.01) among the genotypes for all traits, indicating the presence of adequate variability. Maximum values of genotypic coefficients of variation were recorded for spike length (8.66 %), number of productive tillers (8.4 %), number of grains per spike (6.4 %) and thousand-seed mass (6.15 %); this also shows the presence of substantial variability for these traits. Genetic parameters of the study revealed that days to heading, plant height, spike length, number of grains per spike and thousand-seed mass had moderate to high heritability and genetic advance as percent of the mean. Therefore, direct selection could be practiced to improve bread wheat for these traits. Moreover, selection of early-cycle lines which can escape the negative effects of climate change will be possible. Grain yield had strong and significant positive correlation with thousand-seed mass (r<sub>g </sub>= 0.395**), biological yield (r<sub>gv</sub>= 0.617**) and harvest index (r<sub>g </sub>= 0.731**); selection based on these traits will be most effective in future bread wheat yield improvement programs as they also exerted strong positive direct effects on grain yield.</p>

scholarly journals Some Genetic Parameters and Path Coefficient of Three-Way Crosses in Maize

2021 ◽  
Vol 910 (1) ◽  
pp. 012099
Author(s):  
Banan Hassan Hadi ◽  
Wajeeha Abed Hassan ◽  
Majid S.H. Hamdalla
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Leaf Area ◽  
Correlation Coefficients ◽  
Direct Selection ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
Positive Significant Correlation

Abstract Correlation and path coefficient analysis were worked out for ten morphological traits in 30 three-way crosses of maize. Phenotypic and genotypic correlation analysis indicated that ear length; row numbers per ear, grain numbers per row, leaf area and leaves numbers had a positive significant correlation with grain yield per plant. Further partitioning of correlation coefficients into direct and indirect effects showed that traits days to silking, row numbers per row and leaves numbers had a positive direct effect on grain yield per plant. The traits ear length, grain numbers per row and leaf area had a maximum total effect on grain yield. Furthermore, PCA analysis has gave interested results and it supported the results of correlation and path analysis. The correlation and path analysis obviously indicated that direct selection based on these attributes may be useful in raising grain yield in maize.

scholarly journals Genetic Variability and Path Analysis Studies in Barley (Hordeum vulgare L.)

2019 ◽  
Vol 7 (2) ◽  
pp. 243-247
Author(s):  
Mohammad Quamrul Islam Matin ◽  
Mohammad Amiruzzaman ◽  
Md. Motasim Billah ◽  
Most. Bilkis Banu ◽  
Nazmun Naher ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Path Analysis ◽  
Plant Height ◽  
Seed Weight ◽  
Block Design ◽  
Spike Length ◽  
Direct Selection ◽  
Hordeum Vulgare L ◽  
Days To Heading ◽  
Positive Direct

The present study was carried out to investigate the correlation coefficient, path analysis and genetic variability among some barley varieties for nine characters in a Randomize Block Design (RBD) with three replications in three environments of Bangladesh. High genotypic coefficient of variation (GCV) was obtained from grain/ spike (29.89 %), yield/ plant (28.72%) and effective tiller/plant (21.86 %) and spike length (13.56 %). The characters with high GCV indicated high potential for selection. The highest heritability (Hb) was observed for 1000 seed weight (95.09) followed by yield/ plant (93.98), grain/ spike (92.09) and spike length (69.93), days to heading (72.65) but the lowest Hb was identified for effective tiller/plant (22.41) followed by the plant height (34.21). Those traits with higher heritability may be considered for selection. Grain/ spike had the highest positive direct effect (5.65) on yield followed by 1000 seed weight (4.65), spike length (1.26), yield/ plant (0.66), days to heading (0.55) and days to maturity (0.34). These parameters were identified as direct selection. Direct negative effect on yield was shown by plant height (-0.32) and effective tiller/plant (-0.74). This was an indication of indirect selection. Int. J. Appl. Sci. Biotechnol. Vol 7(2): 243-247

scholarly journals Genetic Variation in Early Growth Characteristics of Two Populations of Wild Service Tree (Sorbus torminalis (L.) Crantz) and Their Interrelationship

2008 ◽  
Vol 57 (1-6) ◽  
pp. 340-348 ◽  
Author(s):  
K. Espahbodi ◽  
H. Mirzaie-Nodoushan ◽  
M. Tabari ◽  
M. Akbarinia ◽  
Y. Dehghan-Shuraki ◽  
...  
Keyword(s):  
Path Analysis ◽  
Plant Height ◽  
Direct Effect ◽  
Indirect Effect ◽  
Correlation Coefficients ◽  
Early Growth ◽  
Genotypic Correlation ◽  
Sorbus Torminalis ◽  
Collar Diameter ◽  
Wild Service Tree

AbstractThis study was performed in order to compare two wild service tree populations (Sorbus torminalis (L.) Crantz) for their early growth and to find useful vegetative characteristics to be used in indirect selection of fast and tall growing trees of the species in the field. We used phenotypic and genotypic correlation coefficients estimated on data from 30 three-year old seedlings of each 40 randomly selected adult trees. Assuming genetic differences between the trees sampled, path analysis was performed on genotypic and phenotypic levels. Results showed that plus trees of one of the sites may be used for clonal seed orchard establishment. But the other site is suggested as a better site for breeding purposes with more effective Sorbus population. Collar diameter had the strongest positive direct effect and strongest correlation with plant height at the phenotypic level. In contrast, lateral branches showed very weak direct effect but relatively strong total indirect effect on plant height. Path analysis on the genotypic correlation coefficients detected negative indirect effect between the characters. Collar diameter could be regarded as a good predictor of plant height because of its strong direct and indirect phenotypic and genotypic correlations. The use of recommended selection criteria is discussed.

scholarly journals Variability Study of Advanced Fine Rice with Correlation, Path Co-efficient Analysis of Yield and Yield Contributing Characters

2014 ◽  
Vol 2 (3) ◽  
pp. 364-370 ◽  
Author(s):  
M. A. Rahman ◽  
M. S. Hossain ◽  
I.F. Chowdhury ◽  
M.A. Matin ◽  
H. Mehraj
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Plant Height ◽  
Direct Effect ◽  
Positive Association ◽  
Negative Association ◽  
Panicle Length ◽  
Positive Direct ◽  
Variability Study

The experiment was conducted in experimental Farm, Sher-e-Bangla Agricultural University, Bangladesh from July to December 2011 to study the variability of advanced lines of fine rice with correlation and path co-efficient of yield and yield contributing characters. Seven newly developed lines viz. S-1, S-2, S-5, AL-33(II), AL-36, AL-42(II), AL-44(I) and Chinigura. Grain yield/plant of newly developed advanced fine rice lines and check showed positive association in respect of number of effective tillers/hill (0.308), number of filled spikelets/panicle (0.110) and weight of 1000-grains (0.109), whereas significant negative association with panicle length (-0.609), number of unfilled spikelets/panicle (-0.542) and non significant negative association with plant height (-0.136) and number of ineffective tillers/hill (-0.304). Path analysis revealed that plant height had positive direct effect (0.154), number of effective tillers/hill had positive direct effect (0.065), number of ineffective tillers/hill had negative direct effect (-0.114), panicle length had positive direct effect (0.163), number of filled spikelets/panicle had positive direct effect (0.285), number of unfilled spikelets/panicle had negative direct effect (-0.154), weight of 1000-grains had positive direct effect (0.234) on grain yield/plant. DOI: http://dx.doi.org/10.3126/ijasbt.v2i3.11069Int J Appl Sci Biotechnol, Vol. 2(3): 364-370  

scholarly journals Path Analysis and Genetic Parameters for Grain Yield in Bread Wheat (Triticum aestivum L.)

2019 ◽  
pp. 1-8 ◽  
Author(s):  
Rahul Singh Rajput
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Block Design ◽  
Strong Association ◽  
Canopy Temperature ◽  
Triticum Aestivum L ◽  
Test Weight ◽  
Growing Seasons ◽  
Randomized Block Design ◽  
Positive Direct

The experiment was conducted with 2 replications and 54 genotypes of wheat consisting 10 lines, 4 testers and their 40 crosses made in line X tester mating fashion in randomized block design during growing seasons 2014-2015. Spike length recorded the highest value of broad sense heritability while Canopy temperature index reported the highest value of genetic advance as a percent of mean and also reported highest phenotypic and genotypic coefficient of variation. Genotypic path analysis revealed that test weight and weight of grain/spike exhibited positive and strong association with grain yield and highest positive direct effects on grain yield. The selection for yield contributing test weight and weight of grain/spike must be given preference along with grain yield for speedy improvement grain yield.

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