scholarly journals Phenotypic correlation and path analysis in cultivars and strains of upland rice for drought tolerance

2017 ◽  
pp. 1474-1484
Author(s):  
Thiago Gledson Rios Terra ◽  
Tarcísio Castro Alves de Barros Leal ◽  
Paulo Hideo Nakano Rangel ◽  
Aluízio Borém
Keyword(s):  
Drought Tolerance ◽  
Path Analysis ◽  
Upland Rice ◽  
Phenotypic Correlation ◽  
Correlation And Path Analysis

scholarly journals Correlation and path analysis of yield and its components and plant traits in wheat

2004 ◽  
Vol 34 (6) ◽  
pp. 1701-1708 ◽  
Author(s):  
Lauro Akio Okuyama ◽  
Luiz Carlos Federizzi ◽  
José Fernandes Barbosa Neto
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Plant Traits ◽  
Flag Leaf ◽  
Phenotypic Correlation ◽  
Path Coefficient ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
Correlation And Path Analysis ◽  
Positive Direct

This study was aimed to characterize yield components and plant traits related to grain yield. Correlation and path analysis were carried out in wheat genotypes grown under irrigated and non-irrigated field conditions. In the path coefficient analysis, grain yield represented the dependent variable and the number of spikes m-2, number of grains spike-1, kernel weight, days to anthesis, above-ground biomass m-2 and plant height were the independent ones. In both years, periods without rain occurred from early milk to grain ripening and from flag leaf sheath opening to grain ripening for first and second sowing dates, respectively. Character associations were similar in both water regimes. Grain yield showed positive phenotypic correlation with above-ground biomass, number of spikes m-2 and number of grains per spike. Path analysis revealed positive direct effect and moderate correlation of number of spike m-2 and number of grains per spike with grain yield. These results indicated that the number of spikes m-2 and the number of grains per spike followed by the above-ground biomass were the traits related to higher grain yield, under irrigated and late season water stress conditions.

scholarly journals Phenotypic correlations and path analysis for plant architecture traits and grain production in three generations of cowpea

Revista CERES ◽  
2016 ◽  
Vol 63 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Hugo Leonardo Coelho Ribeiro ◽  
Carlos Antônio Fernandes Santos ◽  
Laerte da Silva Diniz ◽  
Layana Alves do Nascimento ◽  
Edna Deodato Nunes
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Plant Architecture ◽  
Statistical Significance ◽  
Phenotypic Correlation ◽  
Cowpea Cultivars ◽  
Phenotypic Correlations ◽  
Three Generations ◽  
Correlation And Path Analysis ◽  
Selection Of

ABSTRACT The objective of this study was to analyze the phenotypic correlation and path analysis of traits related to plant architecture, earliness and grain yield in F2, BC1 and BC2 generations, from crosses between cowpea cultivars BRS Carijó and BR14 Mulato. Most phenotypic correlations of the examined traits were concordant in statistical significance, with approximate values among the examined generations. For the trait seed weight, significant and positive phenotypic correlations were observed in the three generations only for the trait number of secondary branches. The values of the direct effects were in agreement with the values of the phenotypic correlations, which indicate true association by the phenotypic correlation among the traits of grain yield examined. Path analysis indicated that the selection of productive plants will result in early plants and an increased number of secondary branches. In F2, plants with shorter length of the main branch and shorter length of secondary branches can be obtained. The causal model explained 15 to 30% of the total variation in grain weight in relation to the traits examined. The analyses indicated the possibility of selecting plants with a higher and early grain yield, shorter length of primary branches and lower number of nodes, which are important variables for mechanical or semi-mechanical harvesting.

scholarly journals Correlation and Path Analysis in Commercial Tenera Oil Palms Collected from Southern Thailand

2021 ◽  
Author(s):  
Pilalak Popet ◽  
Theera Eksomtramage ◽  
Jakarat Anothai ◽  
Thanet Khomphet
Keyword(s):  
Path Analysis ◽  
Oil Palm ◽  
Dry Weight ◽  
Fresh Fruit ◽  
Oil Yield ◽  
Phenotypic Correlation ◽  
Fresh Fruit Bunch ◽  
Southern Thailand ◽  
Oil Palms ◽  
Correlation And Path Analysis

Background: Tenera oil palm is widely planted as a commercial plantation crop throughout Southern Thailand. The purpose of this study was to evaluate the phenotypic correlation and the direct and indirect effects among bunch yields and vegetative characteristics in commercial tenera oil palms. Methods: The oil yield, fresh fruit bunch, bunch number, average bunch weight, leaf area, leaf dry weight and rachis length were recorded from six commercial tenera oil palm progenies. The data were recorded between January 2019 and June 2020 at The Chaipattana Foundation’s oil palm plantation in Trang Province, Thailand. Result: Results show that fresh fruit bunch, average bunch weight and rachis length positively correlated with oil yield (rp = 0.90**, 0.50* and 0.53, respectively), while bunch number and rachis length positively correlated with fresh fruit bunch (rp = 0.58* and 0.47*, respectively). The path analysis shows that bunch number significantly correlated with fresh fruit bunch (0.58*) and strongly directly affected it (1.11). The fresh fruit bunch significantly correlated with oil yield, (0.90**) and had a strong direct (2.08) and indirect effect (1.20). These results indicate that bunch number and fresh fruit bunch are useful variables for oil yield improvement in further breeding programs of oil palm.

scholarly journals Genetic correlation and path analysis of agronomical traits of soybean (Glycine max) lines infected by CpMMV

2019 ◽  
Vol 20 (6) ◽  
Author(s):  
MARIA MONICHA FAOT ◽  
SITI ZUBAIDAH ◽  
HERU KUSWANTORO
Keyword(s):  
Glycine Max ◽  
Path Analysis ◽  
Disease Severity ◽  
Seed Yield ◽  
Phenotypic Correlation ◽  
Main Experiment ◽  
Correlation And Path Analysis ◽  
Agronomical Traits ◽  
Number Of Seeds ◽  
Number Of Branches

Abstract. Faot MM, Zubaidah S, Kuswantoro H. 2019. Genetic correlation and path analysis of agronomical traits of soybean (Glycine max) lines infected by CpMMV. Biodiversitas 20: 1496-1503. CpMMV is a virus that can decrease soybean production. The virus vector is an insect where the control is carried out using a chemical insecticide that is less environmentally friendly. Developing a superior variety of soybean that is resistant to CpMMV is one of the solutions to solve such a problem. This research aimed to study the relationship of agronomical traits to the yield of soybean line infected by CpMMV. Ten lines and two varieties of soybean with four replications was used in this study in a randomized complete block design. Bemisia tabaci was used in CpMMV infestation as the vector of the disease. Rearing Bemisia tabaci was done forty days before sowing the main experiment, and it placed surrounding the main experiment plots. The observation variables were disease severity, days to flowering and maturity, plant height, length, width and ratio of the leaf, number of branches and reproductive nodes, number of filled and unfilled pods, number of seeds, 100 seeds weight, and seed yield per plant. The data was analyzed for genotypic and phenotypic correlation, and the path analysis for direct and indirect effects of disease severity, and agronomical characters. The results showed that CpMMV infestation caused disease severity by about 20-28.5%. A significant positive phenotypic correlation to the seed yield per plant was shown by the number of reproductive nodes and the 100 seeds weight. Meanwhile, a significant positive genotypic correlation to the seed yield per plant was shown by the days to maturity and the number of branches. The number of reproductive nodes, the 100 seeds weight, and the number of seeds per plant showed a high direct effect to the seed yield per plant. The high positive indirect effect was also shown by the number of filled pods, days to flowering, plant height, leaf length, leaf width, the number of reproductive nodes, and the number of branches through the number of seeds per plant was also. Therefore, the selection criteria for high yielding CpMMV-resistant soybean lines can be based on the number of reproductive nodes and 100 seeds weight.

scholarly journals Phenotypic Correlation and Path Analysis in Sunflower Genotypes and Pollination Influence on Estimates

2017 ◽  
Vol 3 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Emerson Dechechi Chambó ◽  
Newton Tavares Escocard de Oliveira ◽  
Regina Conceição Garcia ◽  
Maria Claudia Colla Ruvolo-Takasusuki ◽  
Vagner de Alencar Arnaut de Toledo
Keyword(s):  
Path Analysis ◽  
Phenotypic Correlation ◽  
Correlation And Path Analysis

scholarly journals Study of Correlation and Path Analysis in the Selected Okra Genotypes

2020 ◽  
pp. 1-11
Author(s):  
A. T. M. Hamim Ashraf ◽  
M. Mizanur Rahman ◽  
M. Mofazzal Hossain ◽  
Umakanta Sarker
Keyword(s):  
Path Analysis ◽  
Direct Effect ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Phenotypic Correlation ◽  
Genotypic Correlation ◽  
Fruit Length ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
Fruit Diameter

An experiment was conducted at the experimental farm, Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur from March 2008 to July 2008 to study the correlation and path analysis in the selected okra genotypes. The experiment was carried out in Randomized Complete Block Design with thee replications. The results indicated that different genotypes varied significantly regarding all the studied characters. The Fruits per plant and fruit weight of different genotypes had a high degree of significant positive association with fruit yield and a high positive direct effect indicated that these characters had a major contribution towards the fruit yield of the genotypes. The days to first flowering and days to first fruit harvest showed a significant positive correlation with picking duration both genotypic and phenotypic levels. The Picking duration showed a highly significant positive genotypic correlation with fruit diameter and fruit length. At the final harvest plant height showed a highly significant positive genotypic correlation with fruit length and fruit weight at the genotypic level. The fruit length showed a highly significant positive genotypic correlation with fruit weight and fruit diameter and genotypic level. The fruits per plant showed a highly significant positive genotypic and phenotypic correlation with fruit yield. A significant positive genotypic correlation with fruit yield was shown by fruit weight. The fruits per plant (0.979) and fruit weight (0.554) also showed a high positive direct effect on fruit yield.

scholarly journals Drought tolerance in selected aerobic and upland rice varieties is driven by different metabolic and antioxidative responses

Planta ◽  
2021 ◽  
Vol 254 (1) ◽  
Author(s):  
Giovanni Melandri ◽  
Hamada AbdElgawad ◽  
Kristýna Floková ◽  
Diaan C. Jamar ◽  
Han Asard ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Upland Rice ◽  
Vegetative Stage ◽  
Clear Understanding ◽  
Multiple Time ◽  
Rice Varieties ◽  
Antioxidant Power ◽  
Antioxidative Response ◽  
Biomass Loss ◽  
Osmotic Acclimation

Abstract Main conclusions Sugar-mediated osmotic acclimation and a strong antioxidative response reduce drought-induced biomass loss at the vegetative stage in rice. Abstract A clear understanding of the physiological and biochemical adaptations to water limitation in upland and aerobic rice can help to identify the mechanisms underlying their tolerance to low water availability. In this study, three indica rice varieties-IR64 (lowland), Apo (aerobic), and UPL Ri-7 (upland)-, that are characterized by contrasting levels of drought tolerance, were exposed to drought at the vegetative stage. Drought-induced changes in biomass, leaf metabolites and oxidative stress markers/enzyme activities were analyzed in each variety at multiple time points. The two drought-tolerant varieties, Apo and UPL Ri-7 displayed a reduced water use in contrast to the susceptible variety IR64 that displayed high water consumption and consequent strong leaf dehydration upon drought treatment. A sugar-mediated osmotic acclimation in UPL Ri-7 and a strong antioxidative response in Apo were both effective in limiting the drought-induced biomass loss in these two varieties, while biomass loss was high in IR64, also after recovery. A qualitative comparison of these results with the ones of a similar experiment conducted in the field at the reproductive stage showed that only Apo, which also in this stage showed the highest antioxidant power, was able to maintain a stable grain yield under stress. Our results show that different metabolic and antioxidant adaptations confer drought tolerance to aerobic and upland rice varieties in the vegetative stage. The effectiveness of these adaptations differs between developmental stages. Unraveling the genetic control of these mechanisms might be exploited in breeding for new rice varieties adapted to water-limited environments.

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