Revista Brasileira de Fruticulturahttps://www.scielo.br/journal/rbf/feed/2024-02-20T19:57:05.831000ZVol. 46 - 2024Werkzeug‘Ataulfo’ mango maturity index prediction using the AS7262 spectral sensor10.1590/0100-294520240482024-02-20T19:57:05.831000Z2020-08-09T06:49:05.990000ZCano, David VargasSchlam, Federico Félix Hahnde la O, José Luis RodríguezPriego, Alejandro Facundo Barrientos
<em>Cano, David Vargas</em>;
<em>Schlam, Federico Félix Hahn</em>;
<em>De La O, José Luis Rodríguez</em>;
<em>Priego, Alejandro Facundo Barrientos</em>;
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Abstract ‘Ataulfo’ mango is highly produced in Mexico, being harvested when it reaches its physiological maturity. This process takes at least another month for the fruit to reach consumption maturity. Warehouses and markets present important losses as the ready-to-eat status is unknown. Maturity status is determined by measuring slow and destructive physicochemical variables. An optical device based on the AS7262 spectral sensor was connected to the ESP32 microcontroller and measurements were correlated with soluble solids content (SSC), dry matter (DM) and firmness of mangoes obtained from the local market. Data analysis was carried out by partial least squares (PLS) regression, classification, regression tree (CART) and random forest (RF) models. With PLS, SST and firmness were predicted with R2 of 0.61 and 0.76, respectively. The root mean squared error of prediction (RMSEP) was 0.91 for SSC and 0.67 for firmness. With the CART model, classification accuracy was 90% for SSC and 87% for firmness of intact mango fruits.Economic analysis of the harvest date effects on quality and productivity of ‘Fuji Suprema’ apples10.1590/0100-294520240642024-02-20T19:57:05.831000Z2020-08-09T06:49:05.990000ZArgenta, Luiz CarlosAnese, Rogerio de OliveiraThewes, Fabio RodrigoVieira, Marcelo JoséAlvarenga, Tiago Henrique de PaulaFreitas, Sérgio Tonetto deArgenta, Luiza Helena Machado
<em>Argenta, Luiz Carlos</em>;
<em>Anese, Rogerio De Oliveira</em>;
<em>Thewes, Fabio Rodrigo</em>;
<em>Vieira, Marcelo José</em>;
<em>Alvarenga, Tiago Henrique De Paula</em>;
<em>Freitas, Sérgio Tonetto De</em>;
<em>Argenta, Luiza Helena Machado</em>;
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Abstract This study aimed to analyze the effect of harvest date on ‘Fuji Suprema’ apple quality, productivity, and economic profitability at harvest and after storage. Apples were harvested at the beginning of the commercial harvest window (H1), ten days after H1 (H2), and 22 days after H1 (H3) in the 2008 and 2009 growing seasons. A total of six samples with ~400 kg of fruit (~2,900 apples) each were picked at each growing season and harvest date, which were assessed at harvest (six subsamples of 100 fruit) and after 250 days of controlled atmosphere storage at 0.8 °C. The economic analysis considered fixed and variable production costs in the orchard and postharvest practices and the productivity of packaged apples (pack-out). Early harvested (H1) apples had greater flesh firmness, acidity, and lower soluble solids content than late-harvested apples (H3), both at harvest and after storage. Delaying harvest by 22 days increased the production by 10.2% due to increased fruit size but reduced the production by 3.6% due to severe sunburn and pre-harvest decay incidence. Late harvest also increased production losses due to decay by 4.4% and 10.9% during storage and shelf, respectively, but reduced production losses due to superficial scald by 17.1 to 22.7%. The net revenue (R$ ha-1) is higher for apples harvested late (H3, flesh firmness of 15.6 lb and starch index of 7.1) than for apples harvested early (H1 and H2) when the fruit is marketed soon after harvest (between April and May). However, for apples marketed after long-term storage, economic profitability is maximum when harvested at an intermediate maturity stage (H2, flesh firmness of 16.4 lb and starch index of 6).Phenological cycle and thermal accumulation in the genotypes of sweet orange in Southern Brazil10.1590/0100-294520240332024-02-20T19:57:05.831000Z2020-08-09T06:49:05.990000ZSchneider, Leonardo AndréGonzatto, Mateus PereiraBoettcher, Gerson NestorGriebeler, Sabrina RaquelMunhoz, Bruno de OliveiraSchwarz, Sergio Francisco
<em>Schneider, Leonardo André</em>;
<em>Gonzatto, Mateus Pereira</em>;
<em>Boettcher, Gerson Nestor</em>;
<em>Griebeler, Sabrina Raquel</em>;
<em>Munhoz, Bruno De Oliveira</em>;
<em>Schwarz, Sergio Francisco</em>;
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Abstract The aim of this work was to study the phenology of several sweet orange cultivars and their relationship with the accumulated degree-day (ADD), under the conditions of the Depressão Central of Rio Grande do Sul, in Southern Brazil. For this, 25 genotypes were evaluated for three consecutive growing seasons between 2015 and 2018. The experiment was carried out in a Citrus Collection located in municipality of Eldorado do Sul, RS, Brazil. The ADD was calculated for each interval between the phenological stages, as well as for the entire cycle. The first one, swelling of the buds, was concentrated between mid-July and early August. Sprouting in winter increased the risk of frost damage. Full bloom occurred between August 28 and September 22, when the orange trees ‘Cabula’, ‘Rubi’, ‘Lima Verde’ and ‘Folha Murcha’ were the first to bloom and ‘Sanguinea’, ‘Salustiana’, ‘Midknight’ and ‘Jaffa’ the last. The last stage evaluated, the skin color change of the fruits, occurred between the beginning of April and the end of May, with 2,306.4 to 2,619.4 ADD, since the beginning of sprouting. The orange trees showed different behavior when compared between genotypes and between years. Two groups of cultivars were defined: early and late.Peach cultivars and new IAC selections for mild winter10.1590/0100-294520240252024-02-20T19:57:05.831000Z2020-08-09T06:49:05.990000ZSobierajski, Graciela da RochaFeldberg, Nelson PiresBarros, Vera Lucia Nishijima Paes deBlain, Gabriel ConstantinoBettiol Neto, José EmílioChagas, Edvan Alves
<em>Sobierajski, Graciela Da Rocha</em>;
<em>Feldberg, Nelson Pires</em>;
<em>Barros, Vera Lucia Nishijima Paes De</em>;
<em>Blain, Gabriel Constantino</em>;
<em>Bettiol Neto, José Emílio</em>;
<em>Chagas, Edvan Alves</em>;
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Abstract Traditional peach production regions provide adequate chill for satisfactorily bud’s flower break dormancy, in cultivars there developed. However, considering the expansion of the orchards in mild winter areas and the expected global trends to warmer conditions, the local development of cultivars became relevant. Based on this background, this study proposed to evaluate the performance of 33 peach and nectarine cultivars and selections in mild winter climate. Features associated to the vegetative development, phenology, productivity and fruit characteristics were measured in nine seasons, and the data analyzed by multivariate analysis of variance. Significant correlations between features were remarked. The Pillai and F tests presented significant results, highlighting significant differences among cultivars for almost all features. Peach and nectarine genotypes showed genetic diversity that may be accessed for use as cultivars, or parental for crosses. ‘IAC Aurora 1’, ‘IAC Aurora 2’, ‘IAC Centenário’, ‘IAC Douradão’, ‘IAC Jóia4’, ‘IAC Ouromel 3’, ‘IAC Régis’, ‘Diamante’, ‘Eldorado’, ‘FlordaPrince’, ‘Premier’ and ‘Tropic Beauty’ were the cultivars with the best results. A large number of selections showed promising results, emphasizing, the ‘IAC 680-177’, ‘IAC 1085-27’, ‘IAC 785-9’, ‘IAC 2982-31’, ‘IAC 4682-45’and ‘IAC 6882-84’.Evaluation of varieties and hybrid selections of mango in the brazilian semi-arid region10.1590/0100-294520240262024-02-20T19:57:05.831000Z2020-08-09T06:49:05.990000ZMatos Filho, Carlos Humberto AiresCarvalho Júnior, José Eduardo Vasconcelos deLima, Maria Auxiliadora Coelho deLopes, Ângela Celis de AlmeidaGomes, Regina Lucia FerreiraLima Neto, Francisco Pinheiro
<em>Matos Filho, Carlos Humberto Aires</em>;
<em>Carvalho Júnior, José Eduardo Vasconcelos De</em>;
<em>Lima, Maria Auxiliadora Coelho De</em>;
<em>Lopes, Ângela Celis De Almeida</em>;
<em>Gomes, Regina Lucia Ferreira</em>;
<em>Lima Neto, Francisco Pinheiro</em>;
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Abstract: The aim of this study was to estimate genetic parameters and select superior mango genotypes using the mixed-models approach. The 16 genotypes, varieties and hybrid selections, were evaluated regarding physical and physical-chemical traits of the fruit using the REML/BLUP methodology. Mango fruit weight and pulp weight can be selected indirectly based on fruit length and diameter, which are more easily evaluated. The hybrids CPAC 26394, Lita, and Rosa 46 stand out in regard to fruit size. The genotypes R12P09, CPAC 2293, Roxa, Omega, Alfa, and Lita have better quality fruit than the Tommy Atkins variety that is widely used in commercial orchards. The Roxa variety has pulp with little or no fiber, a trait that is of great importance to consumers and for industrial processing. The genotypes Alfa, CPAC 5895, Ômega, R10P08, R12P09, R13P10, Rosa 2, Rosa 36, and Rosa 46 have pulp free of internal breakdown. The varieties and hybrid selections of mango show variability regarding fruit traits, and the REML/BLUP methodology is efficient for selection of genotypes with desirable fruit traits in mango.Callusing soil of grafted grape cuttings as a positive feature for climate change10.1590/0100-294520240192024-02-20T19:57:05.831000Z2020-08-09T06:49:05.990000ZAbdel-Mohsen, Mohamed Abdel-AzizRashedy, Ahmed AbdelHady
<em>Abdel-Mohsen, Mohamed Abdel-Aziz</em>;
<em>Rashedy, Ahmed Abdelhady</em>;
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Abstract Nowadays, some relative warming temperatures related to climate change may be provided at the grafting time. Therefore, this study was conducted during two seasons (2018-2019) to study the effect of three callusing method (callusing room, callusing soil, callusing tunnel) and four grafting date (15 Jan., 1Feb., 15 Feb., 1 Mar.) for early (Flame seedless), medium (Thompson seedless) and late (Crimson seedless) grape varieties on grafted grape cuttings as short methods for transplant production. The results indicated that, the early grapes variety achieved higher grafting success on 1st Feb. grafting date as well as the late grape variety in callusing room and callusing soil methods. Also, Callusing soil achieved grafted success by 72.9%, 68.55% and 77.94% compared to callusing tunnel 37.3%, 45.9% and 55% for Flame seedless, Thompson seedless and Crimson seedless, respectively as mean of both seasons. High grafting success resulted from the high content of indole and sugars, along with low phenol content before callusing stage, as well as high indole and low sugars of grafts partner after callusing stage. while, higher phenols was accumulated in rootstock after callusing stage. There is no antagonistic effect between grafts partners. Callusing soil may be considered as an eco-friendly, sustainable and cheaper alternative tool for callusing of grafts cuttings.