Tamanho de amostra para a estimação da média de caracteres de pêssego na colheita e após o armazenamento refrigerado

Toebe, Marcos; Both, Vanderlei; Brackmann, Auri; Filho, Alberto Cargnelutti; Thewes, Fábio Rodrigo

doi:10.1590/s0103-84782012000200004

Cited by 12 publications

(10 citation statements)

References 6 publications

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“…The weight of cultivar Ataulfo is in the range reported by Gálvez-López et al (2010a) in Ataulfo cultured of Chiapas. The variable fruit weight showed CV between 13 and 24.5% (Figure 1) which could be said to be an intermediate coefficient (TOEBE et al, 2012). The trend was similar for all the evaluated cases, showing the lowest CV with a sample size between 6 (where the inflection point of the curve is perceived) and 8 fruits (CV from 17.9 to 19.1%), except for the cultivar Ataulfo from Nayarit that with a sample size of 20 his CV decreased to 13.5%; however, for practical purposes it can be said that if a sample size of 8 is chosen it is sufficient to have reliability in the data.…”

Section: Resultsmentioning

confidence: 99%

Optimum sample size in quantitative characteristics of seeds of polyembrynic mango

2018

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Determining the sample size in a scientific investigation is important because it gives reliability in the results together with the efficiency in the use of resources and optimization of time. Polyembryony is a characteristic that allows to obtaining clonal and zygotic plants in the same seed. In mango this characteristic is presented, however, there is no information that mentions which is the adequate sample size to evaluate it. The objective of the present work was to determine the optimum sample size by means of the maximum curvature method for future polyembryony studies. Mangoes from the cultivar Manila and Ataulfo were collected from the states of Guerrero and Nayarit, Mexico. In each state, two orchards of each cultivar were chosen, and in each one three trees were selected. In the Fruit Biotechnology laboratory of the Colegio de Postgraduados, Campus Montecillo, five fruit variables were evaluated: weight of fruit, seeds (endocarp and embryos), embryos, weight of the largest embryo and number of embryos. In all the variables evaluated, except for the weight of the largest embryo, the inflection point of the curve was in 6 fruits and an optimal sample size of 8 fruits was determined. The minimum variation coefficients (CV) for fruit weight were from 17.9 to 19.1%, for seed weight 12.7 to 19.3%, embryo weight 12.3 to 17.1% and number of embryos 6.7 to 16.7%. In the case of larger embryo weight, it was determined that 20 fruits are the optimal sample size, obtaining CV from 7 to 22.6%. The fruit and seed weight characteristics were the least variation, and number of embryos with higher CV. The cultivar Manila of Nayarit presented the highest CV in all the variables studied.

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Section: Resultsmentioning

confidence: 99%

Optimum sample size in quantitative characteristics of seeds of polyembrynic mango

2018

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“…In peach 'Eldorado ', TOEBE et al (2012) observed that larger sample sizes are required to estimate the mean of pulp firmness, followed by the mass, ratio, and acidity. In the same study, smaller sample sizes were required to estimate the mean of juice content, length, diameter (greater and smaller), coloring, and total soluble solids.…”

Section: ----------------------------------------------------------Lomentioning

confidence: 99%

“…According to BUSSAB & MORETTIN (2011), the sample size is proportional to the variability of the data and the desired reliability, being inversely proportional to the a priori error allowed by the researcher. The sample size dimensioning has been studied in several fruits, such as for the evaluation of fruit traits of peach (TOEBE et al, 2011(TOEBE et al, , 2012 and apple cultivars (MIRANDA et al, 2007;TOEBE et al, 2011TOEBE et al, , 2014, evaluated at harvest and post-harvest. Furthermore, AVANZA et al (2010) established the sample size for measuring the growth pattern and diameter of orange fruits 'Valencia late ' and BARRY et al (1999) reported the sample size required to estimate the juice content, total soluble solids, acidity, and ratio of orange fruits 'Valencia'.…”

Section: Introductionmentioning

confidence: 99%

Sample size for estimate the average of Passiflora caerulea fruits traits

Bandeira

Fortes²,

Toebe

et al. 2016

Cienc. Rural

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“…For peaches subjected to different forms of storage, the sample size was determined to assess flesh firmness, epidermis background color (TOEBE et al, 2011), pulp firmness, mass, acidity, and juiciness (TOEBE et al, 2012). However, knowledge of the number of fruits per batch and treatment for evaluation of the lesioned area due to brown rot on peaches is currently unknown.…”

Section: Introductionmentioning

confidence: 99%

Sampling Plan for Assessing Brown Rot Severity in Peaches Subjected to Different Plant Extracts

et al. 2016

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-The identification of brown rot control derivatives has been the focus of intense research owing to the negative effects of the unrelenting usage of fungicides. Brown rot, caused by Monilinia fructicola, is an important post-harvest disease of peaches. The goal of this study was to estimate the optimum sample size of peaches in order to assess the average lesion size and the influence of different plant extracts on the fruits. Three preparation forms (FPE) were evaluated, as well as another seven forms of application (FAE) of canola and mustard extracts on peaches, with applications of the pathogen's inoculum. Five fruits were utilized in five repetitions per treatment. Evaluation involved measurement of the fruits' lesioned areas. The necessary sampling size was determined for estimation of the averages for each treatment and experiment. For measurement of the lesion size, 99 fruits in FPE and 23 fruits in FAE were sufficient for estimating the average with an estimation error of 10%. Based on the same estimation error, the sampling size is contingent on the extracts (canola, and mustard), batches of fruits, forms of extraction, and extract application on the fruits.Keywords: Monilinia fructicola. Experimental Precision. Sample Size. Post-harvest. PLANO AMOSTRAL PARA A AVALIAÇÃO DA SEVERIDADE DE PODRIDÃO-PARDA EM PÊSSEGOS SUBMETIDOS A DIFERENTES EXTRATOS VEGETAISRESUMO -Devido aos efeitos da utilização indiscriminada de fungicidas, diversos estudos vêm sendo desenvolvidos na busca por formas alternativas de controle da podridão-parda, causada por Monilinia fructicola, em pós-colheita de pêssego. O objetivo deste estudo foi estimar o tamanho ótimo de amostra para avaliar a média do tamanho da lesão pêssegos e a influência de diferentes extratos vegetais nos frutos sobre o tamanho de amostra. Foi conduzido um experimento de três formas de preparo (FPE) e outro experimento de sete formas de aplicação (FAE) de extratos de canola e mostarda sobre pêssegos, com posterior aplicação do inóculo do patógeno. Foram usados cinco frutos em cinco repetições por tratamento. As avaliações foram feitas através da medição da área da lesão nos frutos. Foi determinado o tamanho de amostra necessário para a estimacão da média para cada tratamento e cada experimento. Para a mensuração do tamanho da lesão, 99 frutos em FPE e 23 frutos em FAE são suficientes para a estimação da média com um erro de estimação de 10% da média. Usando um mesmo erro de estimação, o tamanho de amostra (número de frutos) depende dos extratos (canola e mostarda), lotes de frutos e formas de extração e de aplicação dos extratos nos frutos.Palavras-chave: Monilinia fructicola. Precisão experimental. Tamanho de amostra. Pós-colheita.

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Tamanho de amostra para a estimação da média de caracteres de pêssego na colheita e após o armazenamento refrigerado

Cited by 12 publications

References 6 publications

Optimum sample size in quantitative characteristics of seeds of polyembrynic mango

Optimum sample size in quantitative characteristics of seeds of polyembrynic mango

Sample size for estimate the average of Passiflora caerulea fruits traits

Sampling Plan for Assessing Brown Rot Severity in Peaches Subjected to Different Plant Extracts

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