Characterization of tomato accessions for resistance to early blight

The purpose of this study was to characterize 50 tomato genotypes of the Vegetable Genebank of the Federal University of Viçosa. They were evaluated together with the controls Débora, Fanny and Santa Clara, in a randomized block design with two replications. The experiment was conducted in a research field of the UFV, from February to May 2007. We evaluated the disease severity, which is the percentage of diseased leaf area. The severity values were transformed into area under the disease progress curve (AUDPC), improving the result visualization. The analysis of variance and grouping of AUDPC means by the Scott-Knott test at 5 % significance were performed. The accessions BGH-2081, BGH-2034, BGH-700, BGH-2057, BGH-2035, BGH-2054, BGH-2018, BGH-2065, BGH-2008, and BGH-2032 had a lower mean AUDPC than the controls and are therefore indicated for future breeding programs.

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Genetic characterization of the 28 maize landraces in Paraná State

Semina Ciências Agrárias ◽

10.5433/1679-0359.2017v38n4p1715 ◽

2017 ◽

Vol 38 (4) ◽

pp. 1715 ◽

Cited By ~ 1

Author(s):

Sara Regina Silvestrin Rovaris ◽

Pedro Mário de Araújo ◽

Deoclécio Domingos Garbuglio ◽

Cleber Vinicius Guiaretta de Azevedo ◽

Cássio Egídio Cavenaghi Prete

Keyword(s):

Recurrent Selection ◽

Agronomic Traits ◽

Block Design ◽

Breeding Programs ◽

Randomized Block Design ◽

Fixed Model ◽

Maize Landraces ◽

Ear Height ◽

Female Flowering

The characterization of maize landraces is extremely important in breeding programs for use of these genotypes as sources of genetic variability. The objective of this study was to quantitatively characterize 28 populations of maize landraces from the state of Paraná using the estimates of the effects of varieties and heterosis parents and the general combining ability, thereby assessing the main agronomic traits. In the crop of 2008/09, 56 inter-varietal hybrids, obtained through a topcross, 28 populations of maize landraces and three check varieties were evaluated for female flowering (FF), plant height (PH), ear height (EH) and grain mass (GY). The treatments were evaluated in a randomized block design, with two replications, at three Paraná State locations: the Experimental Center of the Agronomic Institute of Paraná in Londrina (IAPAR) and the experimental units of Pato Branco and Ponta Grossa. The data were submitted to an analysis of variance, considering a fixed model for genotypes and a random model for environments; the averages grouped by the Scott-Knott test, along with intersections of topcrosses, were analyzed according to a readapted model proposed by Oliveira et al. (1997). According to estimates of the parental effects, the GI 133 population showed the most promising estimates for all characteristics. The GI 088 and GI 173 populations stood out with promising estimates of the effects of heterosis. The conclusion is that the populations GI 133 and GI 173 may be indicated for recurrent selection programs or participation in obtaining composites.

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Caracterização da Peneira Média em Clones de Coffea canephora

REVISTA FIMCA ◽

10.37157/fimca.v5i2.58 ◽

2018 ◽

Vol 5 (2) ◽

pp. 28-31

Author(s):

Darlan Darlan Sanches Barbosa Alves ◽

Victor Mouzinho Spinelli ◽

Marcos Santana Moraes ◽

Carolina Augusto De Souza ◽

Rodrigo da Silva Ribeiro ◽

...

Keyword(s):

Genetic Improvement ◽

Block Design ◽

Coffea Canephora ◽

Coffee Production ◽

Randomized Block Design ◽

Significant Difference ◽

The Mean ◽

Four Blocks ◽

Selection Of

Introdução: O estado de Rondônia se destaca como tradicional produtor de café, sendo o segundo maior produtor brasileiro de C. canephora. No melhoramento genético de C. canephora, a seleção de plantas de elevada peneira média está associada à bebida de qualidade superior. Objetivos: O objetivo desse estudo foi avaliar a variabilidade genética de clones de C. canephora para o tamanho dos grãos, mensurado a partir da avaliação da peneira média (PM). Materiais e Métodos: Para isso, foi conduzido ao longo de dois anos agrícolas experimento no campo experimental da Embrapa no município de Ouro Preto do Oeste-RO, para a avaliação da peneira média de 130 genótipos (clones) com características das variedades botânicas Conilon, Robusta e híbridos intervarietais. O delineamento experimental utilizado foi de blocos ao acaso, com quatro repetições de quatro plantas por parcela. Resultados: Não houve resultados significativos para a interação clones X anos, indicando uma maior consistência no comportamento das plantas ao longo do tempo. Porém foram observadas diferenças significativas para o tamanho dos grãos entre os genótipos avaliados, possibilitando selecionar genótipos superiores. Conclusão: Os genótipos agruparam-se em cinco classes de acordo com o teste de média, subsidiando a caracterização de um gradiente de variabilidade da característica avaliada ABSTRACTIntroduction: Coffea canephora accounts for approximately 35% of the world's coffee production. The state of Rondônia stands out as a traditional coffee producer, being the second largest Brazilian producer of C. canephora. In the classical genetic improvement of C. anephora, the selection of plants of high average sieve is associated with a drink of superior quality. Objectives: The objective of this udy was to evaluate the genetic variability of Coffea canephora clones for the agronomic medium sieve (PM). Materials and Methods: The experiment was conducted in the experimental field of Embrapa, municipality of OuroPreto do Oeste-RO, located at coordinates 10º44'53 "S and 62º12'57". One hundred thirty genotypes (clones) of botanical characteristics Conilon, Robusta and intervarietal hybrids were evaluated in the agricultural years 2013-2014 and 2014-2015. The experimental design was a randomized block design with four blocks and four plants per plot, spacing 3.5 x 1.5 meters between plants. Results: Significant difference was found for the grain size. According to the F test, at 5% probability, the genotypes were grouped into five classes according to the mean test. Conclusion: The results obtained subsidized the characterization of a variability gradient of the evaluated trait.

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MORPHOLOGICAL AND PRODUCTIVE CHARACTERIZATION OF FORAGE CACTUS VARIETIES

Revista Caatinga ◽

10.1590/1983-21252015v28n326rc ◽

2015 ◽

Vol 28 (3) ◽

pp. 230-238 ◽

Cited By ~ 2

Author(s):

PHILIPE LIMA DE AMORIM ◽

JANAINA AZEVEDO MARTUSCELLO ◽

JOSÉ TEODORICO DE ARAÚJO FILHO ◽

DANIEL DE NORONHA FIGUEIREDO VIEIRA DA CUNHA ◽

LIANA JANK

Keyword(s):

Block Design ◽

Morphological Characteristics ◽

Correlation Coefficients ◽

Dry Mass ◽

Negative Effects ◽

Breeding Programs ◽

Area Index ◽

Promising Alternative ◽

Randomized Block Design ◽

Use Efficiency

ABSTRACT: Cultivars of the genus Nopalea are known in Brazil for being tolerant to cochineal carmine attacks, thus making the cultivation of this genus a promising alternative for mitigating the negative effects of this insect on the production of biomass. With the objectives of characterizing morphologically spineless forage cactus varieties and identify morphological characteristics that may be the focus in spineless forage cactus breeding programs, an experiment was conducted in a completely randomized block design with 11 treatments and four replications. The variety Alagoas showed the highest values of weight, area and volume of cladodes. The varieties Negro Michoacan F7 and V7, Tamazunchale V12 showed the highest values of the cladode area index, the total volume of cladodes and total fresh mass production. The varieties Negro Michoacan V7 and F7 presented the highest water use efficiency and dry mass yield. Cladode volume showed the highest correlation coefficients with the fresh weight of cladodes. Aiming the release of varieties for biomass production, varieties Negro Michoacan F7, V7 and Tamazunchale V12 may substitute the Miúda variety. The number and cladode area index may be used as criteria for selection of superior varieties in breeding programs.

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Ametoctradin: a new fungicide for potato late blight control

Arquivos do Instituto Biológico ◽

10.1590/1808-1657000352014 ◽

2016 ◽

Vol 83 (0) ◽

Cited By ~ 1

Author(s):

Jesus Guerino Töfoli ◽

Ricardo José Domingues ◽

Walter Jacobelis Jr. ◽

Marina Pacheco Lombardi Tortolo

Keyword(s):

Late Blight ◽

Block Design ◽

Potato Late Blight ◽

Significant Control ◽

Progress Curve ◽

Randomized Block Design ◽

Commercial Potato ◽

Crop Development ◽

Potato Crops ◽

Application Volume

ABSTRACT: Late blight (Phytophthora infestans ) is among the most important and destructive diseases in potato cultivation. Aiming to evaluate the efficacy of the new fungicide ametoctradin, mixed with dimethomorph and metiram, an experiment was carried out in commercial potato crops (Ágata cultivar) in Pilar do Sul, São Paulo state, Brazil, during the growing season in 2013. A randomized block design was used, with 4 replications, on plots of 15 m2. Applications were carried out using a backpack sprayer with a spray-bar under 3 bar of constant pressure. The application volume varied from 300 L to 600 L.ha-1 based on crop development. The variables evaluated were leaf severity (0 to 100%), area under the disease progress curve, and yield. Ametoctradin + dimethomorph (1.25 L.ha-1) provided significant control of late blight, exceeding benthiavalicarb + fluazinam, dimethomorph + metiram, dimethomorph + pyraclostrobin, cymoxanil + mancozeb, metalaxyl-M + mancozeb, ametoctradin + metiram, and pyraclostrobin + metiram, although similar to ametoctradin + dimethomorph (1.00 L.ha-1), fluopicolide + propamocarb, and fenamidone + propamocarb. Ametoctradin + metiram resulted in moderate control, which was always similar to the standard. Ametoctradin and its associations represent a new alternative for the management of potato late blight.

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Effect of different irrigation levels on the performance of wheat

Progressive Agriculture ◽

10.3329/pa.v29i2.38293 ◽

2018 ◽

Vol 29 (2) ◽

pp. 99-106 ◽

Cited By ~ 1

Author(s):

ST Islam ◽

MZ Haque ◽

MM Hasan ◽

ABMMM Khan ◽

UK Shanta

Keyword(s):

Block Design ◽

Coastal Region ◽

Growth Yield ◽

Research Field ◽

Growth And Yield ◽

Irrigation Level ◽

Randomized Block Design ◽

Package Program ◽

Biological Yield ◽

Irrigation Levels

An experiment was conducted at the research field of the Department of Agricultural Botany, Patuakhali Science and Technology University, Patuakhali under the Agro-ecological zone-13 (AEZ-13) during the period from November 2012 to February 2013. The aim of the study was to identify the most effective irrigation level for obtaining the better growth and higher yield performance of BARI Gom-25 that are suitable to cultivate under coastal region of Patuakhali, Bangladesh. So, the present study was consists of five irrigations levels including control viz. control or no irrigation (T0), one irrigation at 25 DAS (T1), two irrigations at 25 and 40 DAS (T2), three irrigations at 25, 40 and 55 DAS (T3) and four irrigations at 25, 40, 55 and 70 DAS (T4). The seeds of BARI Gom-25 were collected from the BARI, Joydebpur, Gazipur on 22 November, 2012. The experiment was laid out in completely randomized block design (RCBD) with four replications and analysis was done by the MSTAT-C package program where means were separated by DMRT at 5% level of probability. Data were recorded on various growth and yield attributing traits. The plot size was 5 m2 (2.5 × 2.0 m) where row to row and seed to seed distances were 20 and 10 cm respectively. Data were collected on various morpho-physiological growth, yield and yield attributing traits. Results obtained from the present study, whole characters of the study were significant at 5% by the moisture (irrigation) levels where three irrigations given at 25, 40 and 55 DAS had most effective than that of other moisture levels and no irrigation. From the results investigation, it was found that the tallest plant (76.86 cm), maximum requiring days to anthesis (61.00 days), maturity (109.0 days) and maximum number of effective tillers (5.00 hill-1),the highest grain growth (3.11g at 36 DAA) and grains (44.00 spike-1) were obtained with three irrigation (T3) levels. Similarly, T3 further showed the greater performance on spike length (17.28 cm), 1000-seed weight (50.16 g), grain (4.16 t ha-1), straw (5.89 t ha-1) and biological yield (10.05 t ha-1) as well as the higher harvest index (41.39%). Investigated above whole characters were produced lower performances under no moisture (irrigation) treatments. These results indicated that irrigation at three times (T3) would be most advantageous irrigation levels for wheat production under the studied non saline ecosystem of coastal region.Progressive Agriculture 29 (2): 99-106, 2018

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Tanggap Pertumbuhan Bibit Tebu Merah (Saccharum officinarum L.) Asal Bud Set terhadap Pemangkasan dan Frekuensi Penyiraman

Jurnal Pertanian Tropik ◽

10.32734/jpt.v5i1.3148 ◽

2018 ◽

Vol 5 (1) ◽

pp. 136-146

Author(s):

Supriadi Hartanto ◽

Irsal ◽

Asil Barus

Keyword(s):

Block Design ◽

Saccharum Officinarum ◽

Research Field ◽

Stem Diameter ◽

Randomized Block Design ◽

Bud Set ◽

Wet Weight ◽

Number Of Leaves ◽

Plant Stem ◽

Weight Pruning

This research was conducted to determine the growth of red sugarcane seedling on pruning and frequency of watering. This research was conducted in the research field of Faculty of Agriculture University of Sumatera Utara (± 25 m asl) from June-October 2017 using Factorial Randomized Block Design with three replications. The first factor was pruning (control, 1, and 2 months/plant) as well as the second factor was the frequency of watering (1, 3, 5, and 7 days/plants). The variable observed were plant height, a number of leaves, stem diameter, a number of the tiller, shoot wet weight, root wet weight, and shoot-root ratio. The results showed that the frequency of watering treatment had a significant effect on the number of a leaf (4,6,8,10 and 12 weeks after plant), stem diameter (4,6,8,10 and 12 weeks after plant), shoot wet weight, and root wet weight. Pruning treatment had no significant effect on all variables observed. The interaction of both has no significant effect on all variables observed.

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Genotypic selection of multispecific hybrids obtained through crosses between commercial Passiflora edulis and wild passiflora species

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452021963 ◽

2021 ◽

Vol 43 (1) ◽

Author(s):

Mara Cecília de Mattos Grisi ◽

Nilton Tadeu Vilela Junqueira ◽

Leo Duc Haa Carson Schwartzhaupt da Conceição ◽

Fábio Gelape Faleiro ◽

Marcelo Fideles Braga ◽

...

Keyword(s):

Block Design ◽

Fruit Weight ◽

Passion Fruit ◽

Simultaneous Increase ◽

Interspecific Crosses ◽

Breeding Programs ◽

Passiflora Edulis ◽

Interspecific Introgression ◽

Randomized Block Design ◽

Sour Passion Fruit

Abstract The interspecific introgression of resistance genes to diseases in commercial varieties through interspecific crosses has been adopted as a strategy in breeding programs of sour passion fruit. This work aimed to evaluate 11 progenies of multispecific hybrids obtained from crosses involving seven Passiflora species, in addition to four commercial cultivars, using the REML/BLUP method. The experiment was carried out as a randomized block design with six repetitions and three plants per plot. Ten fruit traits were evaluated. The additive, multiplicative, and sum of ranks indexes were applied to determine the most appropriate selective strategy in the simultaneous increase of fruit weight, number of fruits, and yield. Plants from the 325 x VAO progeny showed a lower bacterial defoliation index and better means predicted for the traits number of fruits and productivity. The progenies 325 x LD4, PL3 x LD4, and the controls CSB-Marília and BRS-Gigante Amarelo showed plants with better-predicted means for traits related to fruit quality. The genetic gains demonstrated good prospects for the use of wild species in sour passion fruit genetic breeding.

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Calcium and potassium contents in nutrient solution on Phoma leaf spot intensity in coffee seedlings

Revista CERES ◽

10.1590/0034-737x201663040008 ◽

2016 ◽

Vol 63 (4) ◽

pp. 486-491 ◽

Cited By ~ 1

Author(s):

Aricléia de Moraes Catarino ◽

Edson Ampélio Pozza ◽

Adélia Aziz Alexandre Pozza ◽

Leone Stabile dias Santos ◽

Gabriel Brandão Vasco ◽

...

Keyword(s):

Nutrient Solution ◽

Leaf Spot ◽

Block Design ◽

Fungal Diseases ◽

Growth Chamber ◽

Spot Intensity ◽

Controlled Conditions ◽

Progress Curve ◽

Randomized Block Design ◽

Nutrient Solutions

ABSTRACT Coffee is one of the main export commodities of Brazilian agribusiness. Phoma leaf spot [Phoma tarda (Stewart) Boerema & Bollen] is one of the most important coffee fungal diseases in Brazil. Therefore, this study aimed to evaluate the intensity of Phoma leaf spot in coffee seedlings supplied with different rates of Ca+2 and K+. The study was conducted under controlled conditions in a growth chamber, at the Department of Phytopathology - UFLA, from February 2010 to December 2011. The assay was repeated twice under the same conditions. The nutrient solutions consisted of five concentrations of K+ (3, 4, 5, 6, 7 mmol L-1) and Ca+2 (2, 4, 6, 8 and 10 mmol L-1). The experiment was arranged in a randomized block design, with 25 treatments and three replicates, with two plants per plot. The areas under incidence progress curve (AUIPC) and severity (AUSPC) were calculated. At the lowest rate of Ca2+ (2 mmol L-1) and highest K+ (6 and 7 mmol L-1), approximately, the AUIPC was the smallest. For the AUSPC, the lowest rates of Ca+2 and K+ resulted in the lowest severities. Supply of Ca+2 and K+ in nutrient solution reduced AUIPC and AUSPC of Phoma leaf spot, and these nutrients can be recommended for the management of the disease.

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Evaluation of Sunflower (Helianthus annuus L.) Hybrids Using Multivariate Statistical Analysis

Helia ◽

10.1515/helia-2015-0007 ◽

2015 ◽

Vol 38 (63) ◽

pp. 175-187

Author(s):

Natalija Markova Ruzdik ◽

Ilija Karov ◽

Sasa Mitrev ◽

Biljana Gjorgjieva ◽

Biljana Kovacevik ◽

...

Keyword(s):

Seed Yield ◽

Environmental Conditions ◽

Agronomic Traits ◽

Block Design ◽

Principal Component ◽

Original Data ◽

Research Field ◽

Multivariate Statistical ◽

Main Components

AbstractEvaluation and characterization of sunflower hybrids using morphological, physiological and biochemical data are necessary and essential in sunflower breeding programs. The aim of this paper was to evaluate the productive possibilities of some sunflower hybrids grown in Macedonian environmental conditions. The experiment was carried out during the period 2013 and 2014 on the research field of the Faculty of Agriculture, “Goce Delchev” University – Shtip, in Ovche Pole locality, Republic of Macedonia. Total 20 sunflower hybrids were used as an experimental material. The trial was arranged as randomized complete block design (RCBD) with three replications. The average content of oil and oleic acid were 45.6 and 65.2%, respectively. The highest seed yield from all sunflower hybrids was obtained for the hybrid NLK12M144 (3,344 kg ha–1) and the lowest for hybrid NLK12S126 (2,244 kg ha–1). Cluster analysis classified the sunflower hybrids into four groups based on agronomic traits and seed yield. Most of the hybrids were included in cluster I and III (7 hybrids) followed by cluster IV. Using principal component analysis two main components have been extracted, with eigenvalue greater than one. They account for 72.99% of the variability in the original data. Only four hybrids had positive values for both main components (NLK12M144, NLK12S070, NLK12S125 and NLN12N011 DMR). The results from this study can be used to identify the best sunflower hybrids grown under Macedonian environmental conditions and to select the superior hybrids for future exploitation.

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Manganese Fractionation in Soils after Application of Municipal Solid Wastes Compost in Two Consecutive Years

Applied and Environmental Soil Science ◽

10.1155/2016/5202789 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

Molod Samiei ◽

Abdolamir Bostani

Keyword(s):

Organic Matter ◽

Block Design ◽

Research Field ◽

Solid Wastes ◽

Residual Fraction ◽

Municipal Solid Wastes ◽

Randomized Block Design ◽

Compost Application ◽

Mn Concentration ◽

Mn Oxides

In order to study the effect of Tehran municipal solid wastes compost on manganese accumulation in soil and to determine its concentration in any readily available plant forms (exchangeable and carbonates-bonded), Mn-oxides bonded fraction, organic matter bonded fraction, and residual fraction in a calcareous soil, a factorial experiment based on completely randomized block design (RCBD) was conducted in research field of Shahed university at different levels of municipal solid wastes compost (0, 15, 30, and 60 ton/ha) as first factor and application times (one- or two-year compost application) as second factor in three replications. Results showed that, by increasing compost level, total Mn concentration, DTPA-extractable concentration, and amounts existing in all five fractions were increased, so lowest and highest amounts of Mn were observed in control and 60 ton/ha compost application. Based on results from Mn fractionation using Tessier consecutive extraction method, Mn fractions in all samples were in the following order: residual > Fe-Mn oxides > carbonates-bonded > organic matter-bonded ≫ exchangeable fractions in which residual fraction (RE) at first and second year was dominant rather than other fractions by 34.28–43.04 and 34.28–49.48 percent, respectively. Mn concentration in Fe-Mn oxides-bonded fraction at both years was considerable. Mn amounts in Fe-Mn oxides- bonded, application times were decreased.

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