scholarly journals Path correlation and Bayesian analysis on popping expansion components in popcorn hybrids

2020 ◽  
Vol 38 (1) ◽  
pp. 3-8
Author(s):  
Gustavo Hugo Ferreira de Oliveira ◽  
Gabriela Pelegrini ◽  
Tâmara Rebecca Albuquerque De Oliveira ◽  
Maisa Nascimento Carvalho ◽  
Gustavo Vitti Môro
Keyword(s):  
Bayesian Network ◽  
Path Analysis ◽  
Negative Correlation ◽  
Block Design ◽  
Kernel Size ◽  
Cause And Effect ◽  
Superior Genotypes ◽  
Grain Width ◽  
Individual Grains ◽  
Expansion Volume

Knowing the cause and effect among two or more traits can help to increase the selection accuracy of superior genotypes. The main objective of this study was to evaluate the cause and effect relationship between expansion volume and kernel size in popcorn hybrids using path analysis and Bayesian network. A total of 41 popcorn hybrids were evaluated through a randomized complete block design (RCBD) with two replicates in the city of Jaboticabal, Brazil. The assessed traits were grain length (GL),grain thickness (GT), grain width (GW), caryopsis roundness index (CRI), mass of 50 grains (MG), and expansion volume (EV). Measurements were performed on individual grains, using three 50-grain samples from each plot. Pearson’s correlation coefficient, path analysis and Bayesian network were estimated. A negative correlation was detected among EV and the traits, except for GT. Path analysis indicated that MG has a direct and positive effect on EV and the negative correlation observed is mainly due to the indirect effects by GL and GT. Bayesian networks did not detect a direct association between kernel size and expansion volume while indicating that GT is the only trait that can affect popcorn flake size.

scholarly journals ORRELATION AND PATH ANALYSIS OF INTRODUCTION KIDNEY BEAN (Phaseolus vulgaris L.)

2021 ◽  
Vol 2 (1) ◽  
pp. 50-58
Author(s):  
Yuliawati ◽  
Nani Yulianti ◽  
Raden Deti Indriani
Keyword(s):  
Path Analysis ◽  
Block Design ◽  
Breeding Programs ◽  
A Value ◽  
Kidney Beans ◽  
Timor Leste ◽  
Randomized Complete Block Design ◽  
Superior Genotypes ◽  
Correlation And Path Analysis ◽  
The Relationship

Efforts to improve the yield of kidney beans can be done through plant breeding programs, namely through introduction and selection activities. Selection is carried out to identify superior genotypes and will be effective if the relationship and influence between the characters are known. The research was conducted to study the closeness of the relationship between the characters of introduced kidney beans from Timor Leste and their direct and indirect effects through correlation and path analysis. This research was conducted at the Universitas Djuanda Experimental Garden, Ciawi, Bogor, in August-November 2020. The research design used was a randomized complete block design (RCBD) with accession as a factor and repeated 4 times. The results showed that the number of pods character had the highest correlation coefficient value on seed weight per plant as a yielding character for kidney beans with a value of r = 0.91 *. Besides, the number of pods also had a high direct (0.35) and indirect (0.91) effect through the characters of the number of seeds per pod (0.8) and the number of branches (0.3).    

scholarly journals ASSOCIATIONS BETWEEN TRAITS IN FISÁLIS: A TOOL FOR INDIRECT SELECTION OF SUPERIOR PLANTS

2017 ◽  
Vol 39 (4) ◽  
Author(s):  
NICOLE TREVISANI ◽  
RITA CAROLINA DE MELO ◽  
MAURO PORTO COLLI ◽  
JEFFERSON LUÍS MEIRELLES COIMBRA ◽  
ALTAMIR FREDERICO GUIDOLIN
Keyword(s):  
Path Analysis ◽  
Pearson Correlation ◽  
Block Design ◽  
Correlation Coefficients ◽  
Indirect Selection ◽  
Fruit Weight ◽  
Physalis Peruviana ◽  
Randomized Block Design ◽  
Number Of Seeds ◽  
Fruit Diameter

ABSTRACT Knowledge about associations between traits is fundamental for plant breeding, since indirect selection can accelerate the development of promising genotypes. This study assessed the magnitude of associations between agronomically important traits in fisális (Physalis peruviana L). The experiment was conducted in Lages, Santa Catarina, and the treatments consisted of six fisális populations. The experiment was arranged in a randomized block design, with two replications and seven plants per plot. The correlations between traits were estimated based on the Pearson correlation coefficients and partitioned into direct and indirect effects through path analysis. Fruit weight was positively correlated with number of seeds (0.874), equatorial fruit diameter (0.738) and polar fruit diameter (0.672). By path analysis, number of seeds was identified as the trait with the highest direct contribution to fruit weight. The high phenotypic correlations between the equatorial and polar fruit diameters with fruit weight were mainly due to the indirect effect via number of seeds (0.505 and 0.459). The selection for heavier fisális fruits was strongly influenced by number of seeds, i.e., this trait should be taken into account for selection.

scholarly journals Tolerance to preharvest sprouting and yield of wheat genotypes from different breeding programs

2015 ◽  
Vol 50 (8) ◽  
pp. 698-706
Author(s):  
Rafael Nörnberg ◽  
José Antonio Gonzalez da Silva ◽  
Henrique de Souza Luche ◽  
Elisane Weber Tessmann ◽  
Sydney Antonio Frehner Kavalco ◽  
...  
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Preharvest Sprouting ◽  
Rio Grande Do Sul ◽  
Falling Number ◽  
Breeding Programs ◽  
Wheat Genotypes ◽  
Randomized Complete Block Design ◽  
Superior Genotypes ◽  
Selection Of

Abstract:The objective of this work was to characterize the performance of elite wheat genotypes from different Brazilian breeding programs for traits associated with grain yield and preharvest sprouting. The study was conducted in 2010 and 2011 in the municipality of Capão do Leão, in the state of Rio Grande do Sul, Brazil, in a randomized complete block design with three replicates. Thirty-three wheat genotypes were evaluated for traits related to preharvest sprouting and grain yield. The estimate of genetic distance was used to predict potential combinations for selection of plants with high grain yield and tolerance to preharvest sprouting. The combined analysis of sprouted grains and falling number shows that the TBIO Alvorada, TBIO Mestre, Frontana, Fundacep Raízes, Fundacep Cristalino, and BRS Guamirim genotypes are tolerant to preharvest sprouting. Combinations of TBIO Alvorada and TBIO Mestre with Fundacep Cristalino show high potential for recovering superior genotypes for high grain yield and tolerance to preharvest sprouting.

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 Action of auxin inhibitors on growth and grain yield of soybean

Revista CERES ◽  
2013 ◽  
Vol 60 (5) ◽  
pp. 621-628 ◽  
Author(s):  
Gederson Luiz Buzzello ◽  
Michelangelo Muzell Trezzi ◽  
José Abramo Marchese ◽  
Elouize Xavier ◽  
Edemir Miotto Junior ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Negative Correlation ◽  
Block Design ◽  
Sowing Date ◽  
Growth And Yield ◽  
Fertility Level ◽  
Randomized Block Design ◽  
Soybean Genotypes ◽  
Soybean Plants

Soybean genotypes grown in sub-tropical climate may exhibit lodging. The plant lodging is influenced by soil type and fertility level, sowing date, latitude and altitude of the location, plant population and conditions of crop development. Plant regulators and herbicides are able to avoid or reduce plant lodging. This study aimed to verify the effects of the growth regulators TIBA and daminozide on vegetative growth and yield of soybean cultivar CD 214 RR. The experiment was carried out at a field in randomized block design with four replications in a factorial scheme. The A factor was represented by the combination of regulators TIBA and daminozide and its concentrations, and the Factor B was seven times of evaluation of injury and plant height or eight times of evaluation of lodging. In the range of doses used, the application of daminozide resulted in greater injury to soybean plants than TIBA. The smaller plant height was achieved by the application of 6 g ha-1 of TIBA and 1200 g ha-¹ of daminozide. Treatments with daminozide (100 g ha-¹) and TIBA (10 g ha-1) stood out due to the reduced lodging of soybean plants. Grain weight increased linearly when the levels of TIBA increased. There was a negative correlation between lodging and grain yield and a positive correlation between plant height and lodging. There was also a negative correlation between injury caused by the application of plant regulators and lodging.

Leaf Biochemical Composition of Seven Mulberry Genotypes

2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Crestilyn N. Damasco ◽  
Merlita A. Dacayanan ◽  
Roel D. Supsup
Keyword(s):  
Biochemical Composition ◽  
Evaluation Method ◽  
Block Design ◽  
Phytochemical Analysis ◽  
Total Carbohydrate ◽  
Total N ◽  
Leaf Yield ◽  
Randomized Complete Block Design ◽  
Superior Genotypes ◽  
Index Value

Seven mulberry genotypes, namely: Alf-004, Alf-018, Alf-025, S61-011, S61-019, S54-019 and the Batac were evaluated in terms of biochemical parameters along with leaf yield. Parameters viz; moisture content (MC), total carbohydrate (TC), crude fat (CF), ash, crude protein (CP), Total N,P and K along with leaf yield were analyzed using the ANOVA in Randomized Completely  Block Design (RCBD). Further, Evaluation Method Index was used to determine the superior mulberry genotypes. The data revealed that the different genotypes under study vary in their biochemical components where significant variations in all the parameters evaluated except in percent total phosphorus. For the phytochemical analysis, alkaloids, carbohydrates, glycosides, saponins, phytosterols, phenolic compounds, flavonoids and proteins were detected. Based on the evaluation index value, the identified and selected superior genotypes having higher leaf biochemical composition were Alf-004, Alf-018 and Alf-025. Keywords - Biochemistry, open-pollinated mulberry varieties, phytochemical, Randomized Complete Block Design, Philippines, Asia

Tolerance and Phenotypic Analysis of Irrigated Rice Genotypes under Iron Toxicity

2019 ◽  
pp. 1-11
Author(s):  
Eduardo Anibele Streck ◽  
Gabriel Almeida Aguiar ◽  
Paulo Henrique Karling Facchinello ◽  
Lais Perin ◽  
Pedro Ujacov da Silva ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Evaluation System ◽  
Dry Matter ◽  
Block Design ◽  
Iron Toxicity ◽  
Breeding Program ◽  
Temperate Climate ◽  
Irrigated Rice ◽  
Excess Iron ◽  
Rice Genotypes

Introduction: The development of tolerant rice genotypes is the main tool to minimize the problem caused by the excess of iron in the soil. Aims: The study aims to evaluate the response of genotypes of the Embrapa breeding program of irrigated rice against iron stress, as well as to envision the relationship of the effect of this disorder on leaf mass production in different phenological phases of the plant. Study Design: The trial was established in a randomized block design with additional controls, with the plots consisting of four rows 3 m long with 0.20 m spacing between rows. Place and Duration of Study: The experiment was conducted in the experimental field of Embrapa Temperate Climate Lowlands Station, in a period of nine years, consisting of the harvest of 2006/2007 until 2014/2015. Methodology: It was evaluated 255 lines along with 4 additional control cultivars with known tolerance levels. The symptoms were evaluated at 40, 70 and 100 days after plant emergence through a visual assessment in the field, based on the standard evaluation system for rice. In addition to the determination of the average toxicity levels of genotypes, the mass was collected, constituted by the dry matter of shoot, for the detection of interrelationships through their correlations. Results: It was found that 58.82% of the developed irrigated rice lines show good tolerance to toxicity by excess iron. The association of the content of dry matter of shoots and the levels of indirect toxicity of iron showed a significant negative correlation (-0.6848), being that the highest magnitude of negative correlation was at 70 DAE (-0.6161). Conclusion: There is variability for tolerance to indirect iron toxicity between the irrigated rice genotypes assessed. The breeding program of irrigated rice of Embrapa has been effective in developing genotypes with tolerance by excess iron in the soil over nine years. There is a negative association between the content of dry matter of shoots and the levels of indirect iron toxicity.

Evaluation of genetic variability, heritability and genetic advance in blackgram [Vigna mungo (L.) Hepper]

2018 ◽  
Author(s):  
Shilpa Chauhan ◽  
Raj Kumar Mittal ◽  
A. Lohar ◽  
Vinod Kumar Sood ◽  
Ranjana Patial
Keyword(s):  
Experimental Study ◽  
Seed Yield ◽  
Harvest Index ◽  
Block Design ◽  
Genetic Advance ◽  
Biological Yield ◽  
High Heritability ◽  
Superior Genotypes ◽  
Transgressive Segregants ◽  
Selection Of

An attempt was made to study blackgram germplasm with an objective to develop genetically diverse genotypes accompanied with high heritable components of yield contributing traits. The experimental material comprised of 21 blackgram genotypes, was examined during kharif 2015 and 2016. Experimental study conducted during kharif 2015, was mainly relied on selection of transgressive segregants, which were further analyzed in Compact Family Block Design during kharif 2016. The results depicted that families and progenies within families were significantly different for majority of the traits and found to be highly variable for biological yield, harvest index and seed yield. High heritability coupled with high genetic advance were recorded for plant height (74.15%, 33.12%), branches per plant (84.34%, 40.55%), biological yield (83.51%, 69.11%) and seed yield (84.50%, 66.11%). Thus, the present findings could be beneficial to develop superior genotypes through selection in blackgram breeding program.

scholarly journals Macroelements and Microelements in the Soil and Their Relationship with the Content of Steviol Glucosides in Stevia rebaudiana Bert from Five Regions of Colombia

Horticulturae ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 547
Author(s):  
Enrique Combatt Caballero ◽  
Jaime Hernández Burgos ◽  
Alfredo Jarma-Orozco ◽  
Juan Jaraba Navas ◽  
Luis Rodríguez Páez
Keyword(s):  
Negative Correlation ◽  
Block Design ◽  
Stevia Rebaudiana ◽  
Experimental Unit ◽  
Soil Conditions ◽  
Steviol Glycosides ◽  
Rebaudioside A ◽  
Leaf Production ◽  
Positive Correlation ◽  
Leaf Yield

This study was conducted to determine the effect of edaphic environmental conditions in the concentration of principal steviol glycosides and Stevia rebaudiana Bert yield, utilizing leaves from five Colombian regions. The structure of the experiment was a randomized complete block design with two treatments in a 5 × 2 factorial arrangement (5 locations × 2 radiation levels). In each experimental unit (UE), five healthy plants of similar physiological growth age were selected for the extraction of total glycosides (GT), stevioside (Stv), rebaudioside A (Rb-A),and leaf yield. Results were analyzed with the SAS statistical package (version 9.1). Concentrations of total glycosides and rebaudioside A showed a positive effect with the increase of nitrogen (N), phosphorus (P), magnesium (Mg), and copper (Cu). Therefore, they are important in the available phase of the soil to obtain an increase in these glycosides. Meanwhile, boron (B) presented a negative correlation under these conditions. For the production of stevioside, N, Mg, manganese (Mn) had a positive correlation, and calcium (Ca) and sodium (Na) had a negative correlation. Similarly, for leaf yields by locality, it was found that N, Ca, Mg, and B have a positive correlation with leaf production, while Mg, Mn, and iron (Fe) negatively correlate with biomass gain.The cultivation of stevia can be established in different soil conditions, precipitation and solar radiation in Colombia. Therefore, it is necessary to advance fertilization plans with these nutrients, considering the response of these metabolites to their application.

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