scholarly journals Correlations and path analysis of morphological and yield traits of cactus pear accessions

2013 ◽  
Vol 13 (3) ◽  
pp. 203-207 ◽  
Author(s):  
Diogo Gonçalves Neder ◽  
Fabiane Rabelo da Costa ◽  
Ricardo Loiola Edvan ◽  
Lenildo Teixeira Souto Filho
Keyword(s):  
Path Analysis ◽  
Dry Matter ◽  
Selection Process ◽  
Morphological Characteristics ◽  
Indirect Selection ◽  
Strongly Correlated ◽  
Fresh Matter ◽  
Cactus Pear ◽  
Green Matter ◽  
Selection For

The objectives of this study were to evaluate the relationships between morphological characteristics and fresh matter yield of cactus pear and identify their direct and indirect effects. Nineteen accessions were evaluated for the following traits: number (NCl), thickness (ThCl), length (LCl) and width (WCl) of cladodes, plant height (PH) and plant width (PW), and green matter yield (GMY), dry matter yield (DMY) and dry matter percentage (DM). The correlations were estimated, and path analysis was performed by the method proposed by Wright. GMY was strongly correlated with DMY, allowing indirect selection for this trait. NCl and ThCl had a direct effect on GMY and can be used for indirect selection or as secondary traits in the selection process. Given the lack of significant correlations between MS and DMY, it is possible to select a palm variety with high DMY and DM.

Efficiency of Indirect Selection for Dry Matter Yield Based on Fresh Matter Yield in Perennial Ryegrass Sward Plots

Crop Science ◽  
2008 ◽  
Vol 48 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Patrick Conaghan ◽  
Michael D. Casler ◽  
Pádraig O'Kiely ◽  
Leslie J. Dowley
Keyword(s):  
Perennial Ryegrass ◽  
Dry Matter ◽  
Indirect Selection ◽  
Dry Matter Yield ◽  
Fresh Matter ◽  
Selection For

scholarly journals Association between the morphological and productive characteristics in the selection of elephant grass clones

2011 ◽  
Vol 40 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Márcio Vieira da Cunha ◽  
Mario de Andrade Lira ◽  
Mércia Virginia Ferreira dos Santos ◽  
Erinaldo Viana de Freitas ◽  
José Carlos Batista Dubeux Junior ◽  
...  
Keyword(s):  
Path Analysis ◽  
Dry Matter ◽  
Morphological Characteristics ◽  
Matter Content ◽  
Dry Matter Production ◽  
Leaf Angle ◽  
Dry Matter Content ◽  
Canonical Correlations ◽  
Matter Production ◽  
Tiller Density

The objectives in this work were to study the association between the morphological and productive characteristics in Pennisetum sp. clones, and to identify the morphological characteristics responsible for the productivity in Pennisetum cp. clones. The canonical correlations were evaluated and the path analysis was made from the simple genotypic correlation matrix between the morphological and productive characteristics of eight Pennisetum sp. clones (Taiwan A-146 2.37, Taiwan A-146 2.27, Taiwan-146 2.114, Merker México MX 6.31, Mott, HV-241, Elefante B and IRI-381). The canonical correlations were significant at 1% probability by the Chi-square test. The first pair of canonic factors, with correlation of 0.9999, related the plants with the highest dry matter content to plants with lower leaf area indexes, light perception and leaf angle. The second pair of canonic factors, with correlation of 0.9999, related the plants with the highest dry matter production to the plants with higher basal tiller density, height, and low green leaf number per tiller. The results of the path analysis indicated that the light interception is determinant in dry matter content expression of Pennisetum sp. clones, while the basal tiller density and plant height are responsible for dry matter production in these clones.

scholarly journals Path analysis and expected response in indirect selection for grain yield in soybean

2006 ◽  
Vol 6 (2) ◽  
pp. 151-159 ◽  
Author(s):  
I.M. Bárbaro ◽  
M.A.P.C. Centurion ◽  
A.O. Mauro ◽  
S.H. Unêda-Trevisoli ◽  
N.H.C. Arriel ◽  
...  
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Indirect Selection ◽  
Selection For

scholarly journals MORPHOLOGICAL CHARACTERISTICS AND FORAGE PRODUCTIVITY OF IRRIGATED CACTUS PEAR UNDER DIFFERENT CUTTING INTENSITIES

2016 ◽  
Vol 29 (2) ◽  
pp. 481-488 ◽  
Author(s):  
GUILHERME FERREIRA DA COSTA LIMA ◽  
MARGARETH MARIA TELES REGO ◽  
FERNANDA DANIELE GONÇALVES DANTAS ◽  
RAIMUNDO NONATO BRAGA LÔBO ◽  
JOSÉ GERALDO MEDEIROS DA SILVA ◽  
...  
Keyword(s):  
Plant Height ◽  
Irrigation Water ◽  
Significant Interaction ◽  
Dry Matter ◽  
Management Practice ◽  
Morphological Characteristics ◽  
Planting Density ◽  
Cactus Pear ◽  
Area Index ◽  
Length Width

ABSTRACT: This study evaluated the effect of different cutting intensities and years of harvesting on the morphological characteristics and production of fresh (FMP) and dry matter (DMP) of cactus pear cv. Gigante (Opuntia ficus-indica Mill) under conditions of irrigation, high planting density and fertilization, with 12 months of regrowth. The experimental was completely randomized in a factorial design (3 × 2) with 12 replicates. The treatments were three cutting intensities (preserving the mother cladode (PMC), primary cladodes (PPC), or secondary cladodes (PSC)), and two years of harvesting. The soil was classified as Cambisol Haplicum and the irrigation water was classified as C4S1 (EC 5.25 dS.m-1) density of 50,000 plants ha-1. The research evaluated plant height, number of cladodes per plant (NCP), length, width, perimeter and thickness of the cladodes, cladode area (CA), cladode area index (CAI), FMP and DMP. There was no significant interaction between treatments (P > 0.05) for the variables plant height, NCP, CAI and FMP. The variables related to cladode morphology showed a significant interaction (P < 0.05). The treatment PSC resulted in a greater DMP (P < 0.05) with a mean of 27.17 Mg ha-1 yr-1, compared to PPC (18.58 Mg ha-1 yr-1) or PMC (11.78 Mg ha-1 yr-1). The treatment PSC promoted greater NCP and forage productivity at harvest and can be considered as a management practice for the sustainability of cactus pear cv. Gigante under irrigation. The more important morphological characteristics were also influenced by the lower cutting intensities.

scholarly journals Path Analysis in Soybean Under Drought Stress and Co-inoculated With Azospirillum brasilense

2019 ◽  
Vol 11 (3) ◽  
pp. 311
Author(s):  
Alessandra Maria de Lima Naoe ◽  
Joênes Mucci Peluzio ◽  
Lucas Koshy Naoe ◽  
Leonardo José Motta Campos ◽  
Waldesse Piragé de Oliveira Júnior
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Path Analysis ◽  
Root Length ◽  
Bradyrhizobium Japonicum ◽  
Azospirillum Brasilense ◽  
Dry Matter ◽  
Morphological Characteristics ◽  
Crop Evapotranspiration ◽  
Plot Design

The study was carried out with the objective of verifying the effect of the bacterium Azospirillum brasilense in the behavior of the morphological characteristics of cultivars soybean submitted to drought stress. Two experiments were carried in randomized blocks with a split-split plot design, with four replications. We evaluated the cultivars TMG 132 and ANTA 82. The treatments were subjected to two irrigation depths: total irrigation (100% of crop evapotranspiration) and irrigation with drought stress (25% of crop evapotranspiration) and co-inoculated with Azospirillum brasilense and inoculated whit only Bradyrhizobium japonicum. The coefficients of the correlation between the characteristics: leaf area, plant height, root length, number of nodules, shoot dry matter, root dry matter and nodule dry matter were analyzed, as well as the effects over the productivity through the path analisys. The drought stress did not alter the correlations between the studied characteristics; however the alteration happened due to the inoculation method. The path analysis showed that the root length was the only variable that had a direct effect on soybean grain yield, and this occurred only inoculation. In the co-inoculated treatments with Azospirillum brasilense, there were greater indirect effects in grain yield due the root dry matter and shoot dry matter.

scholarly journals Association of secondary traits with yield in maize F 1 's

2016 ◽  
Vol 46 (5) ◽  
pp. 776-782 ◽  
Author(s):  
Maicon Nardino ◽  
Velci Queiróz de Souza ◽  
Diego Baretta ◽  
Valmor Antonio Konflanz ◽  
Ivan Ricardo Carvalho ◽  
...  
Keyword(s):  
Grain Yield ◽  
Selection Process ◽  
Indirect Selection ◽  
Leaf Angle ◽  
Thousand Grain Weight ◽  
Secondary Traits ◽  
Selection For ◽  
Partial Diallel ◽  
Corn Grain ◽  
Number Of Branches

ABSTRACT: The objective was to identify phenotypic and genotypic associations, and cause-and-effect relations of secondary components on primary components to establish criteria in the indirect selection process for maize. Partial diallel crosses were conducted in Clevelândia. F1's were evaluated in five environments. For the purpose of increasing the yield of corn grain, breeders should seek to reduce the characters distance from the last node to the first branch of the tassel, tassel length and number of branches. The indirect selection for distance from the last node to the first branch of the tassel would be effective to increase the grain yield. The selection for smaller leaf angle, larger stem diameter and thousand grain weight are favorable for increasing grain yield in maize.

scholarly journals Nopalea cactus pear fertilized with nitrogen: morphometric, productive and nutritional characteristics

2018 ◽  
Vol 40 (1) ◽  
pp. 38325
Author(s):  
João Ricardo Avelar Leite ◽  
Eleuza Clarete Junqueira de Sales ◽  
Flávio Pinto Monção ◽  
Adriano De Souza Guimarães ◽  
João Paulo Sampaio Rigueira ◽  
...  
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Matter Content ◽  
Dry Matter Content ◽  
Morphometric Characteristics ◽  
Cactus Pear ◽  
Randomized Block Design ◽  
Green Matter ◽  
Nutritional Characteristics ◽  
Dry Conditions

 This study aimed to evaluate the structural, productive and nutritional characteristics of cactus pear (Nopalea cochenillifera Salm Dyck. cv. Miúda/Doce) under five nitrogen doses and two planting orientations. A randomized block design in a 5 x 2 factorial scheme was used in the scheme: five nitrogen doses (0, 150, 300, 450 and 600 kg of N ha-1), and two planting orientations (North/South and East/West), with three replicates. Except for the thickness of the secondary (p = 0.04) and tertiary cladodes (p = 0.02), the morphometric characteristics of the cactus pear were not influenced by the nitrogen doses (p > 0.05). The mean height was 120 cm, the areas of the primary, secondary and tertiary cladodium were 160.9; 208 and 158.4 cm², respectively. The application of nitrogen fertilizer, in the dry conditions and doses evaluated, did not affect the production of green matter (PGM, p = 0.56), dry matter (PDM, p = 0.74) and dry matter content (DM, p = 0.72), with averages of 276 t ha-1, 43.2 t ha-1 and 15.7%, respectively. The increase of the nitrogen doses does not improve the majority of the morphometric characteristics or the dry matter yield of the cactus pear cv. Miúda at 730 days after planting. 

Productivity and Nutrient Supply in ‘Gigante’ Cactus Pear with Regulated Deficit Irrigation Using Wastewater

2019 ◽  
pp. 1-12 ◽  
Author(s):  
José Alberto Alves De Souza ◽  
Delfran Batista dos Santos ◽  
Thaís Carvalho Camelo ◽  
Giliarde Alves Dos Reis ◽  
Carlos Elízio Cotrim
Keyword(s):  
Deficit Irrigation ◽  
Dry Matter ◽  
Block Design ◽  
Organic Fertilizer ◽  
Nutrient Supply ◽  
Organic Fertilization ◽  
Regulated Deficit Irrigation ◽  
Cactus Pear ◽  
Green Matter

Aims: To evaluate productivity and nutrient supply in 'Gigante' cactus pear with regulated deficit irrigation (RDI) using wastewater, compared to RDI using common water and fertilization with bovine manure. Study Design: Treatments: no fertilization and no irrigation (T1); no fertilization and RDI with wastewater (0.6 L plant-1 week-1) (T2); no fertilization and RDI with wastewater (1.2 L plant-1 week-1, applied once a week) (T3); no fertilization and RDI with wastewater (1.2 L plant-1 week-1, divided into two applications per week) (T4); with organic fertilization (60 Mg ha-1 of bovine manure) and RDI with common water (1.2 L plant-1 week-1) (T5); and with organic fertilization (60 Mg ha-1 of bovine manure) and no irrigation (T6). The treatments were arranged in a randomized complete block design, with five replicates. Place and Duration of Study: The experiment was carried out between October 2015 and August 2017 at Instituto Federal Baiano, Guanambi Campus, Brazil. Methodology: Productivity of green and dry matter, amount of macro and micronutrients applied in the soil by wastewater and by organic fertilizer, macro and micronutrient contents present in the cladodes tissues, and macro and micronutrient contents in the soil were evaluated. The wastewater used was collected in the stabilization pond of the campus. Results: Green matter yield was significantly higher in irrigated treatments. Regarding dry matter, its value was higher in T5 and it did not differ statistically in the others. Conclusions: RDI, using common water, provided a yield of green matter 2.47 times higher than in non-irrigated treatment with the same fertilization; in the absence of organic fertilization, RDI, using wastewater, provided a yield of green matter 1.96 times higher than in non-irrigated treatment; in the absence of irrigation, organic fertilization does not provided a yield higher than in non-fertilized treatment; and the contribution of N, K, Cu, Zn and Mn only by the wastewater is not enough to sustain the crop's productivity in the long term.

Divergent Selection for In Vitro Dry Matter Digestibility in Smooth Bromegrass 1

Crop Science ◽  
1986 ◽  
Vol 26 (6) ◽  
pp. 1123-1126 ◽  
Author(s):  
N. J. Ehlke ◽  
M. D. Casler ◽  
P. N. Drolsom ◽  
J. S. Shenk
Keyword(s):  
Dry Matter ◽  
Divergent Selection ◽  
Smooth Bromegrass ◽  
Dry Matter Digestibility ◽  
Selection For
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