24 results on '"Siquieroli, Ana Carolina Silva"'
Search Results
2. Hyperspectral characterization and estimation models for agronomic parameters of coffee cultivars after pruning
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de Menezes Freitas, Renato Aurélio Severino, Martins, George Deroco, Assis, Gleice Aparecida, Siquieroli, Ana Carolina Silva, dos Santos Fernandes, Marco Iony, Soares, Maria Olivia Queiroz Silva, and da Silva Pinheiro, Bruno Eduardo Caetano Campos
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- 2023
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3. Quality parameters in orange flesh sweetpotato grown in different Brazilian states
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Mello, Alexandre Furtado Silveira, da Silva, Giovani Olegário, da Silva Minguita, Adriana Paula, dos Santos, Felipe Nardo, Samborski, Tarcísio, Ferreira, José Carlos, de Carvalho, José Luiz Viana, Nuti, Marília Regini, Siquieroli, Ana Carolina Silva, and Severo, Joseana
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- 2022
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4. Introgression of the Self-Pruning Gene into Dwarf Tomatoes to Obtain Salad-Type Determinate Growth Lines.
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Pereira, Lucas Medeiros, Maciel, Gabriel Mascarenhas, Siquieroli, Ana Carolina Silva, Luz, José Magno Queiroz, Ribeiro, Ana Luisa Alves, Oliveira, Camila Soares de, Pinto, Frederico Garcia, and Ikehara, Brena Rodrigues Mota
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PLANT breeding ,TOMATO breeding ,SELF-pollination ,PLANT hybridization ,INTROGRESSION (Genetics) ,PLANT growth ,TOMATOES ,FRUIT quality - Abstract
The use of dwarf plants in tomato breeding has provided several advantages. However, there are no identified dwarf plants (dd) containing the self-pruning habit (spsp). The aim of this work was to obtain future generations, characterize the germplasm, and select potential dwarf plants with a determinate growth habit to obtain Salad-type lines. The work was started by carrying out hybridization, followed by the first, second, and third backcrosses. Once F
2 BC3 seeds became available, the introgression of the self-pruning gene (spsp) into dwarf plants (dd) began. Three strains of normal architecture and a determinate growth habit were hybridized with two strains of dwarf size and an indeterminate growth habit, thus yielding four hybrids. Additionally, donor genotype UFU MC TOM1, the commercial cultivar Santa Clara, and the wild accession Solanum pennellii were used in the experiment. Agronomic traits, fruit quality, metabolomics, and acylsugars content were evaluated, and dwarf plants with a determinate growth habit were selected. Hybrid 3 exhibited the highest yields. Visual differences between determinate and indeterminate dwarf plant seedlings were observed. It is suggested to carry out five self-pollinations of the best dwarf plant determined and subsequent hybridization with homozygous lines of normal plant architecture and determinate growth habit to obtain hybrids. [ABSTRACT FROM AUTHOR]- Published
- 2024
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5. Analysis of Combining Ability to Obtain Tropical Carrot Hybrids for Production Traits.
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Coelho, Fernanda Gabriela Teixeira, Maciel, Gabriel Mascarenhas, Siquieroli, Ana Carolina Silva, de Oliveira, Camila Soares, Parrella, Nádia Nardely Lacerda Durães, da Silva, Amilton Ferreira, Luz, José Magno Queiroz, and Nogueira, Ana Paula Oliveira
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CARROTS ,TROPICAL climate ,CULTIVARS ,CHLOROPHYLL ,VEGETABLES ,RESEARCH teams - Abstract
Carrots (Daucus carota L.), a globally significant vegetable, lack extensive research on heterotic groups and diallel analysis to generate hybrid combinations. Thus, the objective of this study was to assess combining abilities and identify optimal carrot parents for producing hybrids suitable for tropical climates with elevated metabolite levels. Twenty carrot hybrids, ten parent plants, and three commercial cultivars were evaluated during the summers of 2020/2021 and 2021/2022. Agronomic evaluations were carried out and chlorophyll and carotenoid levels were determined, followed by a diallel analysis using Griffing's Method III and GGE biplot analysis. There were significant general combining ability (GCA) effects for various agronomic traits, suggesting additive genetic effects. Based on GCA, cultivars 5, 4, and 2 were the most promising parents. Specific combining ability (SCA) revealed that hybrids 1 × 2 and 3 × 5 stood out in environment 1, whereas hybrids 1 × 5 and 5 × 3 performed well in environment 2. The GGE biplot analysis showed that hybrids 1 × 2 and 3 × 2 displayed larger average root diameters, belonged to the group with the best bolting percentages, and exhibited stability across environments. Moreover, hybrids 2 × 4, 3 × 1, 4 × 1, and 4 × 2 exhibited higher metabolite levels. These findings suggest the feasibility of obtaining superior hybrids tailored for the tropical carrot market. [ABSTRACT FROM AUTHOR]
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- 2024
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6. High-Throughput Phenotyping for the Evaluation of Agronomic Potential and Root Quality in Tropical Carrot Using RGB Sensors.
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Coelho, Fernanda Gabriela Teixeira, Maciel, Gabriel Mascarenhas, Siquieroli, Ana Carolina Silva, Gallis, Rodrigo Bezerra de Araújo, Oliveira, Camila Soares de, Ribeiro, Ana Luisa Alves, and Pereira, Lucas Medeiros
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CARROTS ,ARTIFICIAL neural networks ,SELF-organizing maps ,SOIL color ,DRONE aircraft ,REMOTE sensing - Abstract
The objective of this study was to verify the genetic dissimilarity and validate image phenotyping using RGB (red, green, and blue) sensors in tropical carrot germplasms. The experiment was conducted in the city of Carandaí-MG, Brazil, using 57 tropical carrot entries from Seminis and three commercial entries. The entries were evaluated agronomically and two flights with Remotely Piloted Aircraft (RPA) were conducted. Clustering was performed to validate the existence of genetic variability among the entries using an artificial neural network to produce a Kohonen's self-organizing map. The genotype–ideotype distance index was used to verify the best entries. Genetic variability among the tropical carrot entries was evidenced by the formation of six groups. The Brightness Index (BI), Primary Colors Hue Index (HI), Overall Hue Index (HUE), Normalized Green Red Difference Index (NGRDI), Soil Color Index (SCI), and Visible Atmospherically Resistant Index (VARI), as well as the calculated areas of marketable, unmarketable, and total roots, were correlated with agronomic characters, including leaf blight severity and root yield. This indicates that tropical carrot materials can be indirectly evaluated via remote sensing. Ten entries were selected using the genotype–ideotype distance (2, 15, 16, 22, 34, 37, 39, 51, 52, and 53), confirming the superiority of the entries. [ABSTRACT FROM AUTHOR]
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- 2024
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7. High-throughput phenotyping to detect anthocyanins, chlorophylls, and carotenoids in red lettuce germplasm
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Clemente, Andressa Alves, Maciel, Gabriel Mascarenhas, Siquieroli, Ana Carolina Silva, Gallis, Rodrigo Bezerra de Araujo, Pereira, Lucas Medeiros, and Duarte, Jéssyca Gonçalves
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- 2021
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8. Genetic dissimilarity for thermoinhibition in seeds of lettuce lines after defoliation
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Catao, Hugo Cesar Rodrigues Moreira, Maciel, Gabriel Mascarenhas, Gomes, Luiz Antonio Augusto, Siquieroli, Ana Carolina Silva, Luz, Jose Magno Queiroz, and Neto, Luciano Dias Cabral
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- 2023
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9. Agronomic potential of B[C.sub.1][F.sub.2] populations of Santa Cruz dwarf tomato plants
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Gomes, Danilo Araujo, Maciel, Gabriel Mascarenhas, Neto, Luiz Brandao, de Oliveira, Camila Soares, Siquieroli, Ana Carolina Silva, and Finzi, Rafael Resende
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- 2023
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10. Nutritional Characterization Based on Vegetation Indices to Detect Anthocyanins, Carotenoids, and Chlorophylls in Mini-Lettuce
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Clemente, Andressa Alves, primary, Maciel, Gabriel Mascarenhas, additional, Siquieroli, Ana Carolina Silva, additional, Gallis, Rodrigo Bezerra de Araujo, additional, Luz, José Magno Queiroz, additional, Sala, Fernando César, additional, Pereira, Lucas Medeiros, additional, and Yada, Rickey Yoshio, additional
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- 2023
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11. Vegetation Indices for Predicting the Growth and Harvest Rate of Lettuce
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Ribeiro, Ana Luisa Alves, primary, Maciel, Gabriel Mascarenhas, additional, Siquieroli, Ana Carolina Silva, additional, Luz, José Magno Queiroz, additional, Gallis, Rodrigo Bezerra de Araujo, additional, Assis, Pablo Henrique de Souza, additional, Catão, Hugo César Rodrigues Moreira, additional, and Yada, Rickey Yoshio, additional
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- 2023
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12. Artificial neural networks discriminate lettuce seeds with different levels of thermoinhibition
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Catão, Hugo Cesar Rodrigues Moreira, Cardoso, Daniel Bonifácio Oliveira, Maciel, Gabriel Mascarenhas, Gomes, Luiz Antonio Augusto, Siquieroli, Ana Carolina Silva, and Neves, Flávia de Oliveira Borges Costa
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storage ,inteligência computacional ,computational intelligence ,seed dormancy ,Lactuca sativa L ,dormência de sementes ,harvest ,colheita ,armazenamento - Abstract
The thermoinhibition of lettuce seed germination causes important losses for producers, who do not have thermotolerant commercial cultivars. One of the obstacles has been the scarcity of optimizing techniques capable of efficiently discriminating thermotolerant and thermosensitive cultivars. The aim of this work was to evaluate the use of neural networks to discriminate different levels of thermoinhibition in lettuce seeds. Seeds of 18 cultivars were evaluated for thermoinhibition considering the characteristics of the first and last germination count and germination speed index, in seeds subjected to temperatures of 20, 25, 30 and 35 °C. The remaining seeds, which did not germinate, were subjected to the tetrazolium test. Analyses were performed immediately after seed harvesting and repeated after six months of storage. Discriminant analysis was performed and the Kohonen’s Self-Organizing Map (SOM) was created using Artificial Neural Networks (ANNs). Neural networks discriminate lettuce cultivars and organizes them in terms of seed thermoinhibition tolerance through Kohonen’s Self-Organizing Map. Discriminant analysis consistently identifies the Everglades and Luiza genotypes as tolerant to thermoinhibition. Resumo: A termoinibição causa perdas importantes para os produtores, os quais não dispõem de cultivares comerciais com sementes termotolerantes. Há escassez de técnicas otimizadoras capazes de discriminar cultivares termotolerantes e termosensíveis com eficiência. Objetivou-se avaliar o uso de redes neurais para discriminar diferentes níveis de termoinibição em sementes de alface. Foram avaliadas sementes de 18 cultivares quanto à termoinibição considerando às características de primeira e última contagem de germinação e índice de velocidade de germinação, em sementes submetidas às temperaturas de 20, 25, 30 e 35 °C. As sementes remanescentes, que não germinaram, foram submetidas ao teste de tetrazólio. As análises foram realizadas imediatamente após a colheita das sementes e repetidas após seis meses de armazenamento. Uma análise discriminante e o Mapa Auto-Organizável de Kohonen (SOM) por Redes Neurais Artificiais (RNA’s) foram realizados. As redes neurais discriminam as cultivares de alface e as organiza quanto a tolerância a termoinibição das sementes por meio do Mapa Auto-Organizável de Kohonen. A análise discriminante indentifica de maneira coerente o genótipo Everglades e Luiza como tolerantes a termoinibição.
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- 2023
13. Dwarf Tomato Plants Allow for Managing Agronomic Yield Gains with Fruit Quality and Pest Resistance through Backcrossing
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Gomes, Danilo Araújo, primary, Machado, Tardele Gomes, additional, Maciel, Gabriel Mascarenhas, additional, Siquieroli, Ana Carolina Silva, additional, de Oliveira, Camila Soares, additional, de Sousa, Luciana Alves, additional, and da Silva, Humberto Pereira, additional
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- 2022
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14. Early Detection of Coffee Leaf Rust Caused by Hemileia vastatrix Using Multispectral Images
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Soares, Analis da Silva, primary, Vieira, Bruno Sérgio, additional, Bezerra, Thalita Almeida, additional, Martins, George Deroco, additional, and Siquieroli, Ana Carolina Silva, additional
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- 2022
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15. Agronomic potential of BC1F2 populations of Santa Cruz dwarf tomato plants
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Gomes, Danilo Araújo, primary, Maciel, Gabriel Mascarenhas, additional, Brandão Neto, Luiz, additional, Oliveira, Camila Soares de, additional, Siquieroli, Ana Carolina Silva, additional, and Finzi, Rafael Resende, additional
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- 2022
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16. Genetic dissimilarity for thermoinhibition in seeds of lettuce lines after defoliation
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Catão, Hugo Cesar Rodrigues Moreira, primary, Maciel, Gabriel Mascarenhas, additional, Gomes, Luiz Antonio Augusto, additional, Siquieroli, Ana Carolina Silva, additional, Luz, José Magno Queiroz, additional, and Cabral Neto, Luciano Dias, additional
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- 2022
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17. GENETIC AND MORPHOLOGICAL DESCRIPTORS TO ACCESS BRAZILIAN OKRA GENOTYPES DIVERSITY
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CARVALHO, FÁBIO JANONI, primary, MENDONÇA, THIAGO FELLIPE NUNES DE, additional, SIQUIEROLI, ANA CAROLINA SILVA, additional, MACIEL, GABRIEL MASCARENHAS, additional, and CLEMENTE, ANDRESSA ALVES, additional
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- 2022
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18. ‘CIP BRS Nuti’: A New Orange Flesh Sweetpotato Cultivar
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Mello, Alexandre Furtado Silveira, primary, Olegário da Silva, Giovani, additional, da Silva, Juscimar, additional, Samborski, Tarcísio, additional, Ferreira, José Carlos, additional, de Carvalho, José Luiz Viana, additional, Nuti, Marília Regini, additional, Siquieroli, Ana Carolina Silva, additional, Braga, Marcos Brandão, additional, Diaz Trujilo, Federico Celedonio, additional, and Grüneberg, Wolfgang, additional
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- 2022
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19. Indicadores de Qualidade do Solo em Sistemas Agroecológicos no Cerrado Mineiro
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Rocha, Ana Flávia Brandão, primary, Siquieroli, Ana Carolina Silva, additional, Silva, Adriane de Andrade, additional, Carneiro, Amanda Mendes De Lima, additional, Vasconcelos, Bruno Nery Fernandes, additional, and Gondim, Danielle Davi Rodrigues, additional
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- 2022
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20. Reaction of biofortified lettuce genotypes to different strains of Xanthomonas campestris pv. vitians
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Oliveira, Bruna Santos de, primary, Maciel, Gabriel Mascarenhas, additional, Tebaldi, Nilvanira Donizete, additional, Finzi, Rafael Resende, additional, Clemente, Andressa Alves, additional, Siquieroli, Ana Carolina Silva, additional, and Ribeiro, Ana Luisa Alves, additional
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- 2022
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21. DYNAMICS OF HERITABILITY IN DIFFERENT CHARACTERS OF LETTUCE
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OLIVEIRA, ALISSON HENRIQUE GAMA DE, primary, MACIEL, GABRIEL MASCARENHAS, additional, SIQUIEROLI, ANA CAROLINA SILVA, additional, LUZ, JOSÉ MAGNO QUEIROZ, additional, and SILVA, ERNANI CLARETE DA, additional
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- 2021
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22. Fenotipagem de alto desempenho para monitorar a taxa de crescimento e determinar o ponto de colheita em alface vermelha
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Espíndola, Gustavo Mendes, Siquieroli, Ana Carolina Silva, Maciel, Gabriel Mascarenhas, and Carvalho, Fábio Janoni
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vegetables ,Processamento de imagens - Técnicas digitais ,imagens digitais ,Lactuca sativa L ,vegetation indices ,digital images ,Agronomia ,CIENCIAS AGRARIAS::AGRONOMIA [CNPQ] ,Alface - Imagens digitais ,hortaliças ,índices de vegetação - Abstract
A cultura da alface (Lactuca sativa L.) é de grande importância socioeconômica. Apresenta ciclo muito curto tornando um desafio acompanhar o crescimento. No Brasil, há vários plantios comerciais para atender grandes redes de fast foods. Esses produtores realizam o monitoramento da taxa de crescimento diariamente, de forma presencial, após o transplantio. Devido ao rápido crescimento da planta, aliado ao extenso tamanho das áreas, ocorre muito desperdício e prejuízos para o produtor. Diante disso, o objetivo deste trabalho foi monitorar e definir o ponto de colheita em alface vermelha a partir de diferentes índices de vegetação. Foram obtidas imagens por VANT que permitiram calcular o diâmetro da planta, área foliar e os índices de vegetação BI, GLI, HUE, SCI e SI. Com intuito de validar a eficiência dos diferentes índices de vegetação também foram mensurados parâmetros agronômicos no campo (diâmetro de planta, diâmetro de haste, massa verde, número de folhas e temperatura foliar). As avalições foram realizadas em 30 genótipos de alface vermelha. As médias dos parâmetros foram comparadas pelo teste Scott-Knott (p ≤ 0,05). A dissimilaridade genética foi representada por dendrograma obtido pelo método hierárquico UPGMA. Para validar a coerência entre os dados obtidos por imagem, realizou-se a correlação de Pearson. Os genótipos avaliados apresentaram alta variabilidade genética. Os índices de vegetação BI, GLI, HUE, SCI e SI apresentaram altas correlações com diâmetro de planta e área foliar obtidos por imagem. O uso da fenotipagem de alto desempenho foi capaz de monitorar e determinar o ponto de colheita em diferentes genótipos de alface vermelha tornando-se uma excelente alternativa para produtores. Lettuce (Lactuca sativa L.) is a crop of great socioeconomic importance. It has a very short lifecycle; hence, following its growth is challenging. Brazil has several commercial plantations to supply large fast-food chains. These producers monitor the growth rate daily, in person, after transplantation. Owing to the fast growth of the plant and the large sizes of the plantations, the producers face significant food losses and waste. Therefore, the objective of this study was to monitor the growth and determine the harvest point of red lettuce based on different vegetation indices. Images obtained using an unmanned aerial vehicle were used to calculate the diameter of the plant, leaf area, and vegetation indices (BI, GLI, HUE, SCI, and SI). Agronomic parameters (plant diameter, stem diameter, green mass, number of leaves, and leaf temperature) were also measured in the field to validate the effectiveness of the different vegetation indices. Measurements were performed on 30 red lettuce genotypes. The means of the parameters were compared using the Scott-Knott test (p ≤ 0.05). The genetic dissimilarity was represented using a dendrogram obtained by the UPGMA hierarchical method. Pearson’s correlation was used to validate the consistency between the data obtained from images. The evaluated genotypes presented high genetic variability. The vegetation indices (BI, GLI, HUE, SCI, and SI) highly correlated with the plant diameter and leaf area obtained from the images. High-throughput phenotyping could be used to monitor the growth and determine the harvest point of different red lettuce genotypes, and is hence an excellent tool for producers. Dissertação (Mestrado)
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- 2022
23. Vegetation indices for predicting the growth and harvest rate of lettuce
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Ana Luisa Alves Ribeiro, Maciel, Gabriel Mascarenhas, Sala, Fernando Cesar, and Siquieroli , Ana Carolina Silva
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vegetables ,image phenotyping ,Hortaliças - Cultivo ,Lactuca sativa L ,vegetation indices ,CIENCIAS AGRARIAS [CNPQ] ,fenotipagem por imagem ,Agronomia ,Vegetação - Índices ,hortaliças ,índices de vegetação - Abstract
A cultura da alface (Lactuca Sativa L.) apresenta ciclo curto tornando um desafio a determinação do ponto ideal de colheita. A determinação do ponto de colheita é realizada de forma visual resultando em desperdício e prejuízos importantes. O uso de imagens digitais e índices de vegetação têm sido utilizados em diversas culturas para caracterizar variáveis quantitativas e qualitativas, mas de forma insipiente em alface. Objetivou-se com este trabalho avaliar diferentes índices de vegetação para predição da taxa de crescimento e ponto de colheita em alface. Foram avaliados vinte e cinco genótipos de alface verde biofortificadas. A partir de imagens capturadas durante o desenvolvimento das plantas a 1, 8, 18, 24 e 36 dias após o transplantio (DAT), calculou-se os índices de vegetação GLI, NGRDI, SI e HUE. O diâmetro e área foliar média das plantas foram mensurados com o auxílio de software QGIS. Em campo foram mensuradas a massa verde, diâmetro de planta, diâmetro de haste e número de folhas. As médias foram comparadas pelo teste Scott- knott (p ≤ 0,05) e gerados modelos de regressão linear simples visando o monitoramento da taxa de crescimento. A dissimilaridade genética foi representada por dendrograma obtido pelo método de agrupamento UPGMA e a validação entre os dados coletados no campo versus dados obtidos por imagem foi realizada por meio de correlações de Pearson. Os genótipos avaliados apresentaram dissimilaridade genética. Os índices de vegetação e as variáveis extraídas por meio das imagens foram eficientes para monitorar a taxa de crescimento e determinar o ponto de colheita em diferentes genótipos de alface. As variáveis agronômicas mensuradas no campo e os dados extraídos das imagens apresentaram alta correlação. Os índices de vegetação SI, GLI e NGRDI foram eficientes para monitorar a taxa de crescimento e determinar o ponto de colheita em diferentes genótipos de alface verde. Lettuce (Lactuca Sativa L.) culture has a short cycle. As a result, determining the ideal harvest point is challenging. Harvest point is determined visually, causing waste and important losses. Digital images and vegetation indices have been used to characterize quantitative and qualitative variables in diverse cultures; however, these indices have not been appropriately employed for lettuce. The objective of this study was to evaluate different vegetation indices to predict the growth rate and harvest point of lettuce. Twenty-five genotypes of biofortified green lettuce were evaluated. The vegetation indices GLI, NGRDI, SI, and HUE were calculated from images captured during plant development 1, 8, 18, 24, and 36 days after transplanting (DAT). The diameter and average leaf area of plants were measured using QGIS software. Green mass, plant diameter, stem diameter, and number of leaves were measured in the field. The means were compared using the Scott- Knott test (p ≤ 0.05) and simple linear regression models were generated to monitor the growth rate. Genetic dissimilarity was depicted using a dendrogram obtained by the UPGMA grouping method. Furthermore, validation between data collected in the field versus data obtained by imaging was performed using Pearson correlations. The evaluated genotypes showed genetic dissimilarity. Vegetation indices and the variables extracted through images were efficient for monitoring the growth rate and determining the harvest point for different lettuce genotypes. The agronomic variables measured in the field and the data extracted from the images had a high correlation. Overall, the vegetation indices SI, GLI, and NGRDI were efficient for monitoring the growth rate and determining the harvest point of different green lettuce genotypes. Dissertação (Mestrado)
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- 2022
24. High-performance phenotyping for leaf pigments in lettuce genotypes
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Duarte, Jéssyca Gonçalves, Maciel, Gabriel Mascarenhas, Siquieroli, Ana Carolina Silva, Carvalho, Fábio Janoni, and Finzi, Rafael Resende
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Vitamina A ,Qualidade ambiental ,Alface - Interação genótipo-ambiente ,Lactuca sativa ,CIENCIAS AGRARIAS [CNPQ] ,Lutein ,Fenômica ,Lactuca sativa L ,Phenomics ,Vitamin A ,Luteina ,Alface - Pigmentos ,Carotenóides - Abstract
CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior O cultivo de alface possui grande importância socioeconômica no Brasil. Por se tratar de uma hortaliça presente na alimentação, melhoristas de alface têm buscado desenvolver novas cultivares biofortificadas. Um dos entraves tem sido o alto custo das análises realizadas em laboratório aliado a demanda de tempo no campo. Objetivou-se com este trabalho a validação de técnicas por imagem a partir de Veículo Aéreo Não Tripulado (VANT) para seleção de genótipos de alface biofortificadas. O experimento foi realizado em casa de vegetação na Universidade Federal de Uberlândia no delineamento de blocos casualizados com 25 tratamentos e 4 repetições. Foram avaliados quatro diferentes índices de vegetação (NDVI, CVI, GNDVI e CIG), pigmentos foliares (clorofila a, b e total, carotenoide, luteína) e o índice Soil Plant Analysis Development (SPAD). Os dados foram submetidos à análise de variância pelo teste F (p ≤ 0,05). As médias foram comparadas pelo teste Scott-Knott (p ≤ 0,05). A dissimilaridade genética foi representada por dendrograma obtido pelo método hierárquico Unweighted Pair-Group Method using Arithmetic Avarage (UPGMA). Foi avaliada a correlação entre os índices de vegetação versus pigmentos, sendo que os diferentes índices de vegetação foram capazes de mensurar de forma indireta pigmentos foliares em germoplasma de alface verde. A correlação entre os pigmentos, SPAD e o índice NDVI foi confirmada. Germoplasma de alface com ampla variabilidade genética pode interferir nos valores de correlação. Diante disso, sugere-se que os diferentes índices de vegetação sejam analisados individualmente para cada genótipo (per se). Lettuce cultivation has great socioeconomic importance in Brazil. As it is a vegetable present in the diet, lettuce breeders have sought to develop new biofortified cultivars. One of the obstacles has been the high cost of the analyzes carried out in the laboratory, combined with the demand for time in the field. The objective of this study was the validation of imaging techniques using an Unmanned Aerial Vehicle (UAV) for the selection of biofortified lettuce genotypes. The experiment was carried out in a greenhouse at the Federal University of Uberlândia without a randomized block design with 25 treatments and 4 replications. Four different vegetation indices (NDVI, CVI, GNDVI and CIG), leaf pigments (chlorophyll a, b and total, carotenoid, lutein) and the Soil Plant Analysis Development (SPAD) index were evaluated. Data were prepared by analysis of variance using the F test (p ≤ 0.05). Means were compared using the Scott-Knott test (p ≤ 0.05). The genetic dissimilarity was represented by a dendrogram described by the hierarchical method of Unweighted Pairs-Groups Method Using the Arithmetic Mean (UPGMA). A correlation between vegetation indices versus pigments was evaluated, and the different vegetation indices were able to indirectly measure leaf pigments in green-faced germplasm. The correlation between pigments, SPAD and NDVI index was confirmed. Lettuce germplasm with wide genetic variability may interfere with correlation values. Therefore, it is suggested that the different vegetation indices be analyzed individually for each genotype (per se). Dissertação (Mestrado)
- Published
- 2021
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