scholarly journals Variance components and correlations of agronomic traits among cabbage (Brassica oleracea var. capitata L.) maturity groups

Genetika ◽  
2012 ◽  
Vol 44 (1) ◽  
pp. 55-68 ◽  
Author(s):  
Janko Cervenski ◽  
Jelica Gvozdanovic-Varga ◽  
Svetlana Glogovac
Keyword(s):  
Plant Height ◽  
Correlation Coefficients ◽  
Early Spring ◽  
F1 Hybrids ◽  
Plant Weight ◽  
Whole Plant ◽  
Head Weight ◽  
Positive Correlations ◽  
Head Height ◽  
Maturity Groups

In this paper we studied the variability and correlation of cabbage traits in different maturity groups. The study included early spring cabbages (planted in early spring, harvested in early summer) and autumn cabbages (planted in mid-summer, harvested in late autumn). Using coefficients of variation and correlation coefficients, we analyzed 17 cabbage traits in 35 commercially grown cultivars, F1 hybrids, and experimental F1 hybrids. The traits were analyzed separately for each maturity group. In the early cabbages, the coefficients of variation ranged from 4.8 to 44.2%. The calculated correlation coefficients differed between the two maturity groups. The early cabbages had 26 significant positive correlations. The positive correlations calculated among different traits of early cabbages defined this group fully and made it distinct from the late-maturing genotypes. Plant height and rosette diameter in the early genotypes were highly positively correlated with rosette weight, whole plant weight, head weight, usable portion of head, head height, and head diameter. Plant height and rosette diameter participate in the formation of active photosynthetic area in early cabbages. Rosette width in these genotypes provides a greater influx of light and heat, which results in greater head weight. Also, in early cabbages that have greater plant height, the leaf rosette will not lie on the cold surface of the ground in the spring. The activity of the cabbage plant is thus more focused towards the formation of larger head weight. Head volume in the late genotypes was highly positively correlated with rosette diameter, whole plant weight, head weight, usable portion of head, inner stem length, and head height. In late cabbages plant activity is directed towards the formation of head volume due to the longer duration of the growth period, larger leaves, and differences in climatic conditions.

scholarly journals Studiul unor trăsături asociate cu productivitatea la hibrizi experimentali de floarea-soarelui

2021 ◽  
Author(s):  
Clapco Steliana Clapco ◽  
◽  
Aliona Cucereavii ◽  
Ion Gisca ◽  
Maria Duca ◽  
...  
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Physiological Parameters ◽  
Leaf Number ◽  
Head Diameter ◽  
Number Of Leaves ◽  
Positive Correlations

The relationships between seed yield and some morpho-physiological parameters, such as plant height, head diameter, leaf number, number and weight of total and full seeds per head and 1000 seeds in 32 local hybrids has been studied. The analyses of Pearson correlation coefficients showed significant, but low, positive correlations between yield and number of full seeds per calatidium, weight of total seeds per calatidium, weight of 1000 seeds and hectolitre weight. There were also observed positive correla-tions between plant height and number of leaves.

scholarly journals Fine-tuned Head Weight Estimation in Globe Artichoke (Cynara scolymus L.)

HortScience ◽  
2005 ◽  
Vol 40 (3) ◽  
pp. 525-528 ◽  
Author(s):  
Eftal Düzyaman ◽  
Basak Ünver Düzyaman
Keyword(s):  
Correlation Coefficients ◽  
Specific Model ◽  
Nondestructive Method ◽  
Globe Artichoke ◽  
Weight Estimation ◽  
Linear Measurements ◽  
Head Weight ◽  
Spherical Head ◽  
Independent Variable ◽  
Head Height

A novel and nondestructive method for head weight estimation in globe artichoke was described. Linear measurements on head height (h) and head diameter (2r) were performed on head samples of five cultivars and one developed clone having cylindrical, conical or spherical head forms. The measurements on 2r were performed at the base in conical- and cylindrical-headed cultivars, while they were taken equatorially in spherically headed cultivars. Correlation and regression analyses were performed between single true head weights and eight different models [h, r, 2r, r3, r2h, πr2h (cylinder volume), ⅓πr2h (cone volume) and \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\frac{4}{3}{\pi}r^{3}\) \end{document} (sphere volume)]. Since πr2h and ⅓πr2h are folds of r2h, and \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\frac{4}{3}{\pi}r^{3}\) \end{document} of r3; r2h or r3 had completely the same correlation coefficients as their folds, and hence were equally effective in the statistical analyses. Head weights were more precisely estimated when the r2h model (or their folds) was used for cylindrical and conical heads and the r3 model (or their folds) for spherical heads then any other model. Coefficients of determination (R2) explained the highest variability observed for true head weights when the r2h model was used as the independent variable in the regression analysis for cylindrical and conical cultivars (96.6% to 97.5%) and the r3 model for the spherical cultivars (96.6% to 98.4%). Even though all correlation coefficients and regression F values were very highly significant (p < 0.001), 81% of estimated cases had <10% deviations when one of the appropriate models were used in comparison to 66% of the estimated cases having <10% deviations when, for example, the 2r model was used, the second most effective model for all types of heads. The agreement between true and estimated head weights was also tested, where the bias was lower for a cultivar-specific model vs. the 2r model. Discussions on applying the results to the selection procedures were made.

scholarly journals Effect of Planting Position, Pruning and Size of Slip on the Vegetative Development of Pineapple (Ananas comosus) (L) Merr. cv. Smooth Cayenne.

1969 ◽  
Vol 70 (1) ◽  
pp. 63-74
Author(s):  
Francisco L. Jordán-Molero
Keyword(s):  
Plant Height ◽  
Growth And Development ◽  
Correlation Coefficients ◽  
Ananas Comosus ◽  
Soil Conditions ◽  
Vegetative Development ◽  
Plant Weight ◽  
Leaf Weight ◽  
Length Width ◽  
Data Grouping

Vegetative development of 12-month-old Smooth Cayenne plants was observed as affected by planting position, slip pruning and slip size. Data taken included plant height, spread, leaf number and "D"-leaf weight, length, width and thickness. Results showed that vegetative development was not affected by planting in a vertical or inclined position. Plant height, number of green leaves, and "D" leaf weight were negatively affected when slip leaves were pruned although reduction in leaf area is supposed to affect fruit yield. There was no difference among the three pruning treatments. Size of slips showed highly significant differences in all variables observed with the exception of leaf width. Vegatative development was proportional to slip size even though climate and soil conditions were very favorable to growth and development. Growth was vigorous and succulent. Correlation coefficients between all variables studied were highy significant. Plant weight, slip weight, stem weight and stem diameter showed consistent correlation values. Mean comparisons present data grouping on two levels. Slip weight under 200 grams did not show good development.

scholarly journals Correlational Analysis between Growth and Yield Parameters of Cabbage (Brassica oleracea) as Affected by Organic Manure and Inorganic Fertilizer in Jos

2019 ◽  
pp. 1-8
Author(s):  
M. Obidola, Shakirdeen ◽  
I. Iro, Ibrahim ◽  
Anayib Mudi ◽  
Akle, Silas Dapia
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Organic Manure ◽  
Inorganic Fertilizer ◽  
Growth And Yield ◽  
Head Diameter ◽  
Yield Parameters ◽  
Head Weight ◽  
Positive Correlations ◽  
Range Test

Aim: To determine the correlation between the growth and yield parameters of cabbage grown with organic manure and inorganic fertilizer. Study Design: The experimental design consist of randomized complete block design with five treatments which were replicated four times. Location and Duration: The experiment was conducted at the experimental field of Federal College of Forestry, Jos, during the 2018/2019 raining season. Methods: Land clearing was done and the land was properly demarcated based on the different treatments and replicates. Cabbage seeds were first planted in a nursery bed and later transplanted onto the experimental plots. Data was taken on the plant height, leaf count, cabbage head diameter and head weight. The data collected were subjected to analysis of variance (ANOVA) using SPSS version 23 and Duncan Multiple Range Test, used to separate the means were significance occurred. Results: The result of the correlation coefficient of growth and yield showed that a strong correlation exist between plant height and cabbage head weight (r = 0.681 and 0.648) at P ≤ 0.01. Plant height was also positively correlated with head weight (r = 0.365, P ≤ 0.05) and head weight was as well and positively correlated with head diameter at (r = 0.501, P ≤ 0.05). Conclusion: Based on the results obtained, it can be concluded that application of organic manure and inorganic fertilizer has positive correlations between the growth and the yield parameters of cabbage.

scholarly journals Correlation coefficients of morphological: Productive traits of species of Sorghum genus

2012 ◽  
Vol 28 (3) ◽  
pp. 585-593
Author(s):  
S. Jankovic ◽  
S. Rakic ◽  
J. Ikanovic ◽  
J. Kuzevski ◽  
Lj. Zivanovic ◽  
...  
Keyword(s):  
Plant Height ◽  
Correlation Coefficients ◽  
Forage Sorghum ◽  
Sudan Grass ◽  
Hybrid Plants ◽  
Number Of Leaves ◽  
Productive Traits ◽  
Positive Correlations ◽  
The Impact ◽  
Interspecies Hybrid

Objective of the research were phenotypic and genetic correlation coefficients of three species of Sorghum genus - forage sorghum S. bicolor Moench. (genotype NS-Dzin), Sudan grass S. sudanense L. (genotype Zora) and interspecies hybrid S. bicolor x S. sudanense (genotype Siloking). Studies were carried out on samples of plant material from the first cut. The following morphological-productive traits were studied: plant height, number of leaves per plant, mass of leaves on the stem, average stem mass and yield of green biomass. In the analysis of genetic and phenotypic coefficients, differences depending on the impact on studied morphological-productive traits are observed. The highest value of the stem height was recorded in Sudan grass (2.281 m), as well as number of leaves per plants (7.917). The greatest mass of leaves per plant was established in forage sorghum (49.05 g), and the highest average stem mass was recorded in interspecies hybrid plants (80.798 g). Variation of morphological-productive indicators per species was significant and very significant. Coefficients of simple correlations indicate the presence of very strong to almost complete, statistically very significant positive correlations, so these effects were expected. Plant height and number of leaves were not directly but indirectly statistically significant to yield of green biomass and varied from insignificant and very weak to sporadically medium strong and statistically significant.

Relationships among attributes of pure lines of bread wheat derived from heterotic F1 hybrids

1994 ◽  
Vol 45 (3) ◽  
pp. 601
Author(s):  
MN Uddin ◽  
FW Ellison ◽  
L O'Brien ◽  
BDH Latter
Keyword(s):  
Plant Height ◽  
Unit Area ◽  
Kernel Weight ◽  
High Yield ◽  
F1 Hybrids ◽  
Plant Weight ◽  
Selection For ◽  
Basic Characteristics ◽  
Pure Lines ◽  
Positive Heterosis

Measurements were made of the number of spikes per unit area, the number of kernels per spike, kernel weight and plant weight in four heterotic hand-made hybrids and the commercial hybrid Comet, together with the parents of the hand-made hybrids, and 75 pure lines derived from each hybrid by single seed descent. Kernel weight exhibited the strongest heterosis, while the incidence of positive heterosis for the remaining yield components varied between crosses. Mid-parent heterosis for plant height was significant for all hand-made hybrids. In both hybrids and pure lines, high yield was associated with intermediate kernel weight and intermediate plant height, but for each trait higher values were observed in the hybrids and pure lines compared with their parents. In terms of both plant height and the major components of yield, viz. kernel number per unit area and kernel weight, the highest yielding pure lines and the hybrids were similar, demonstrating that it is possible to recover homozygous genotypes with the same basic characteristics as the heterotic hybrids from which they were derived. The absence of any consistent pattern on how the best lines obtained their yield suggests that selection for yield based on its components would be unrewarding, except for selection against extremes of kernel weight and plant height.

scholarly journals RELATIONSHIPS BETWEEN FORAGE YIELD AND CHARACTERS IN SOME NARBONNE VETCH (VICIA NARBONENSIS L.) CULTIVARS SOWN IN EARLY SPRING AT SUBTROPICAL CONDITIONS

2021 ◽  
Vol 10 (19) ◽  
pp. 394-400
Author(s):  
Hazım Serkan Tenikecier ◽  
Adnan Orak
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Correlation Coefficients ◽  
Early Spring ◽  
Forage Yield ◽  
Stem Diameter ◽  
Herbage Yield ◽  
Number Of Leaves ◽  
Plant Stem ◽  
Number Of Branches

The aim of this research was to determine relationships among forage yield and its some characters in Narbonne vetch cultivars sown in early spring at subtropical conditions. This investigation was conducted between 2016-2018 years at Tekirdağ Namık Kemal University, Faculty of Agriculture, Field Crops Department Research and Experimental Area in randomized complete block design with three replications. Three Narbonne vetch (Bozdağ, Dikili and Özgen) cultivars were used. The plant height, number of branches per plant, stem diameter, number of leaves per plant were determined in ten plants. The plant height, number of branches per plant, stem diameter, number of leaves per plant, herbage and hay yields ranged from 40.75-43.09 cm, 1.67-2.72, 5.70-6.57 mm, 10.27-13.73 t ha-1 and 2.28-2.89 t ha-1, respectively, in Narbonne vetch cultivars. A statistically significant and positive relationships were determined between herbage yield and hay yield, between stem diameter and herbage yield and between stem diameter and hay yield. The correlation coefficients analysis showed that the strongest effective trait on herbage yield in Narbonne vetch was the stem diameter. Stem diameter trait can be considered as the primary selection criteria for improving herbage yield in Narbonne vetch at early spring sowing in similar ecological conditions

MATERNAL AND RECIPROCAL EFFECTS ON SEEDLING CHARACTERS IN ARABIDOPSIS THALIANA (L.) HEYNH

Genetics ◽  
1976 ◽  
Vol 82 (4) ◽  
pp. 677-683
Author(s):  
L A Corey ◽  
D F Matzinger ◽  
C Clark Cockerham
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Length ◽  
Early Growth ◽  
F1 Hybrids ◽  
Reciprocal Effects ◽  
Plant Weight ◽  
Weight Percentage ◽  
Maternal Genotype ◽  
Seedling Characters ◽  
Growth Characters

ABSTRACT Five early growth characters were examined in six races of Arabidopsis thaliana (L.) Heynh, their reciprocal F1 hybrids (1974) and F1 by tester hybrids, using a seventh race as a paternal tester. Three of the five characters were also examined at two nutrient levels in reciprocal F1 hybrids (1972) of all seven races. Analyses of F1 and F1 by tester hybrids revealed significant maternal effects in all characters examined in F1 hybrids (1972) and in root length and plant weight of F1 (1974) and F1 by tester hybrids. Significant reciprocal effects were found for plant weight in F1 by tester hybrids and for seed weight, percentage of germination and root length in F1 (1974) and F1 by tester hybrids. The presence of significant maternal and/or reciprocal components in both F1 (1974) and F1 by tester diallels suggests that differences in maternal cytoplasm rather than maternal genotype per se were responsible for much of the variation resulting from these non-direct genetic effects.

scholarly journals Organizational Factors as Predictors of Knowledge Management Practices in Federal University Libraries in Nigeria

2018 ◽  
Vol 13 (2) ◽  
pp. 48-69 ◽  
Author(s):  
Cyprian Ifeanyi Ugwu
Keyword(s):  
Knowledge Management ◽  
Management Practices ◽  
Correlation Coefficients ◽  
Organizational Factors ◽  
Management Tool ◽  
Management Support ◽  
University Libraries ◽  
Internal Reliability ◽  
Knowledge Management Practices ◽  
Positive Correlations

Abstract Objective – University libraries in Nigeria are facing challenges arising from poor funding, increasing user demands, and a competitive information environment. Knowledge management has been accepted by information professionals as a viable management tool, but issues surrounding its application require empirical investigation. The aim of this study is to determine the organizational factors that are correlates and predictors of knowledge management practices in federal university libraries in Nigeria. Methods – The study was based on a correlational research design. Twenty heads of university libraries in Nigeria responded to a structured questionnaire developed by the researcher. The questionnaire was validated by experts and its internal reliability was 0.78 obtained through Cronbach’s alpha procedures. The data collected were analyzed using Mean, Standard Deviation, One-Way ANOVA, Pearson’s Product Moment Correlation Coefficient, and regression analysis. Results – The study found that management support and collaboration were the most significant predictors of knowledge management practices in federal university libraries in Nigeria.  Even though human resources policy and rewards systems had positive correlations with knowledge management practices, their correlation coefficients were not significant. Conclusion – The success of knowledge management in university libraries in Nigeria depends on some contextual factors such as the support given by the management staff and the extent of collaboration among staff.

scholarly journals Effect of planting dates on the yield of broccoli genotypes

2015 ◽  
Vol 40 (3) ◽  
pp. 465-478
Author(s):  
MA Hafiz ◽  
A Biswas ◽  
M Zakaria ◽  
J Hassan ◽  
NA Ivy
Keyword(s):  
Plant Height ◽  
Total Yield ◽  
Planting Date ◽  
Flower Head ◽  
Planting Dates ◽  
Head Diameter ◽  
Head Weight ◽  
Average Plant ◽  
Early Flower ◽  
Average Plant Height

This experiment was conducted during September, 2011 to March, 2012 in the experimental field of Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur to find out the effect of planting date on the yield of broccoli genotypes. There were five genotypes viz. Early green, Forest green, Green calabrese, Premium crop and Green king and four planting dates viz. 2 October, 27 October, 21 November and 16 December. The treatment effects were statistically analyzed and found significant in most of the characters studied. Genotype Green calabrese was the highest in average plant height (53.70 cm). Green king produced the maximum spread diameter (69.23 cm), stem diameter (30.35 mm) and early initiation of floral head. Genotype Early green performed the best regarding head weight (343.87 g), yield per plant (477.4 g) and yield (19.10 t/ha). Broccoli planted on 21 November initiated early flower head, maximum head diameter (16.99 cm), head weight (314.49 g), yield per plant (453.64 g) and total yield (18.15 t/ha). The genotype Early green planted on 21 November showed the best performance in yield per plant (580.17 g) and yield hectare (23.21 t/ha).Bangladesh J. Agril. Res. 40(3): 465-478, September 2015

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