Efeito da carga pendente na qualidade de frutos de laranjeira 'Valência'

Resumo -O objetivo deste trabalho foi determinar o coeficiente de repetibilidade de características de qualidade do fruto de laranjeira-doce (Citrus sinensis) e o número mínimo de avaliações capaz de proporcionar níveis de certeza da predição do valor real dos genótipos. Foram avaliados, em cinco safras, 39 genótipos de laranjeira-doce, coletados em nove municípios do Estado do Acre. Utilizou-se o delineamento de blocos ao acaso, com três repetições. Foram avaliados: massa média de frutos, rendimento de suco, espessura de casca, sólidos solúveis (SS), acidez total (AT), relação SS/AT e índice tecnológico. Para a estimativa dos coeficientes de repetibilidade, foram utilizados os métodos da análise de variância, dos componentes principais e da análise estrutural. Todos os caracteres avaliados mostraram variabilidade, exceto o rendimento de suco. Os caracteres avaliados mostraram padrão cíclico, o que foi mais bem captado pelas metodologias multivariadas de estimativa do coeficiente de repetibilidade. São necessárias 15 avaliações para determinar, com 90% de certeza, os caracteres espessura de casca e sólidos solúveis, e 11, 6, 3, 2 e 1 avaliações, respectivamente para massa média de fruto, acidez total, índice tecnológico, rendimento de suco e relação SS/AT.Termos para indexação: Citrus sinensis, análise multivariada, índice tecnológico, melhoramento genético, rendimento de suco, sólidos solúveis. Repeatability estimates for fruit quality characters of sweet orangeAbstract -The objective of this work was to determine the repeatability coefficient of fruit quality characteristics of sweet orange (Citrus sinensis) and the minimum number of evaluations that can provide levels of prediction certainty of the true genotype value. Thirty nine genotypes of sweet orange, collected in nine municipalities of the state of Acre, Brazil, were evaluated in five crop cycles. A randomized complete block design was used, with three replicates. The following were evaluated: average fruit weight, juice yield, peel thickness, soluble solids (SS), total acidity (TA), SS/TA ratio, and technological index. To estimate the repeatability coefficients, the methods of analysis of variance, principal component analysis, and structural analysis were used. All evaluated characters showed variability, except for juice yield. The evaluated characters showed a cyclic pattern, which was best captured by the multivariate methodologies for estimating the repeatability coefficient. Fifteen evaluations are needed to determine, with 90% certainty, the characters peel thickness and soluble solids, and 11, 6, 3, 2, and 1 evaluations, respectively for average fruit weight, total acidity, technological index, juice yield, and SS/TA ratio, respectively.

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“…Essa característica representa importante atributo de qualidade, e tende a aumentar com o desenvolvimento da planta (Duarte et al, 2011).…”

Section: Resultsunclassified

Estimativa de repetibilidade para caracteres de qualidade de frutos de laranjeira-doce

Negreiros

Andrade-Neto

Miqueloni

et al. 2014

Pesq. agropec. bras.

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“…Tomasetto et al (2009) assessed juice production relative to two graft bearers and concluded that the values were within the acceptable ranges. Duarte et al (2011) estimated properties such as juice yield (JY) and found values that were greater than reported by Azevêdo (2003). However, the TSS values were between 7 and 12 ºBrix, and the TSS/TTA values varied between 3 and 18 ºBrix.…”

Section: Resultsmentioning

confidence: 70%

Spatial variability of soil chemical attributes and productivity and the chemical and physical properties of oranges

et al. 2014

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A GPS receiver and a total station were used to measure the spatial location of the fruit and to determine which quadrant they were located in. In this experiment, 13 trees were studied. Twelve fruits were evaluated in each geographical quadrant, and 156 fruits were considered. After harvest, the productivity was expressed as kg per quadrant (kg quadrant -1 ). Next, physical tests (equatorial diameter (EqD), total fruit mass (TFM), juice yield (JY)) and chemical tests (total soluble solids (TSS), total titrable acidity (TTA), the TSS/TTA ratio, and the ascorbic acid (AA) content) were conducted in the laboratory. In addition, the data were subjected to analysis by descriptive statistics and geostatistics to determine the spatial variability of the physical and chemical properties of the oranges, the variations of the soil properties and the correlations between the following parameters: the pH properties of the fruit and Zn; TFM and K; EqD and K, and C and TSS. The orchard varies spatially, especially regarding the EqD, TFM, JcP, TSS and AA for the quadrants with the highest values (the Northwest, Southeast, Northeast, Southwest and Southeast, respectively). The soil potassium and zinc contents were strongly correlated with the physical and chemical properties of the orange fruits.

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“…2020 http://dx.doi.org/10.14393/BJ-v36n2a2020-46413 Concerning juice yield, fruits from trees grafted on rootstocks that had the highest mass and the thickest rind showed the least juice yield (53.02% and 54.04%), except rootstocks 'Orlando' tangelo and HTR -051, which had the highest juice yield, yielding 57.16% and 56.83%, respectively. According to Duarte et al (2011), rind thickness reflects mainly on juice yield, i.e., the thinner the rind, the better the yield. The 'Pineapple' orange grafted on LVK-CLEO-264, grown in Brejão, Pernambuco, exhibited juice yield of 54% (MEDEIROS et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Performance of the pineapple sweet orange on different rootstocks

et al. 2020

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This study aimed at evaluating the agronomical performance of ‘Pineapple’ sweet orange grafted on ten rootstocks, in 2011-2017 harvests, so as to recommend the best combinations to be commercially explored in citrus growing regions in Bahia and Sergipe states, Brazil. An experiment was installed to test ten rootstock for 'pineapple' sweet orange: 'Santa Cruz' Rangpur lime, 'Red Rough' Lemon, 'Orlando' Tangelo, 'Sunki Tropical' Mandarin, 'Swingle' citrumelo, the citrandarins 'Indio' and 'Riverside' and the hybrids HTR-051, LVKxLCR-010 and TSKxCTTR-002. The trial was installed in 2008 in the municipality of Umbauba in Sergipe. The experimental design was complete randomized blocks with four replications and two plants per plot. Plant spacing was 6 x 4 m which corresponds to 416 plants per hectare and the orchard was rainfed and followed conventional management. The following agronomical parameters were evaluated: vegetative growth, drought tolerance, yield and physico-chemical quality of fruits as well as the abundance of phytophagous mites. Both hybrids LVK x LCR – 010 and TSKC x CTTR-002 and the ‘Santa Cruz’ rangpur lime bestowed higher tolerance to the dry period on the ‘Pineapple’ orange tree, by comparison with higher water deficit susceptibility conferred by the ‘Orlando’ tangelo and the ‘Swingle’ citrumelo. Rootstocks HTR-051, ‘Riverside’ citrandarin, ‘Swingle’ citrumelo and TSKC x CTTR-02 induced plants to remain small and, thus, showed aptitude for culture densification. Cumulative yield of the ‘Pineapple’ orange was higher on rootstocks ‘Red Rough’ lemon and ‘Santa Cruz’ Rangpur lime, the hybrid LVK x LCR-010 and ‘Sunki Tropical’. Yield efficiency was not influenced by the rootstocks. Physico-chemical quality of fruits of ‘Pineapple’ orange is affected by the rootstocks and meets the requirements of juice industries. Regarding plant resistance, the rootstocks did not influence the population density of mites P. oleivora, E. banksi and T. mexicanus on ‘Pineapple’ oranges. Results show that both rootstocks ‘Red Rough’ lemon and ‘Santa Cruz’ rangpur lime conferred high regularity to ‘Pineapple’ orange trees in citrus growing regions in Bahia and Sergipe states.

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Efeito da carga pendente na qualidade de frutos de laranjeira 'Valência'

Cited by 12 publications

References 10 publications

Estimativa de repetibilidade para caracteres de qualidade de frutos de laranjeira-doce

Estimativa de repetibilidade para caracteres de qualidade de frutos de laranjeira-doce

Spatial variability of soil chemical attributes and productivity and the chemical and physical properties of oranges

Performance of the pineapple sweet orange on different rootstocks

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