Consulta: creatorFacets:"Gonçalves,Leandro SA"
Registros recuperados: 16
Data/hora: 10/06/2024 11:04:15

Combinations of distance measures and clustering algorithms in pepper germplasm characterization
Provedor de dados: 75
Autores: Gomes,Gisely Paula; Baba,Viviane Yumi; Santos,Odair P dos; Sudré,Cláudia P; Bento,Cintia dos S; Rodrigues,Rosana; Gonçalves,Leandro SA.
ABSTRACT Characterization and evaluation of genotypes conserved in the germplasm banks have become of great importance due to gradual loss of genetic variability and search for more adapted and productive genotypes. This can be obtained through several ways, generating quantitative and qualitative data. Joint analysis of those variables may be considered a strategy for an accurate germplasm characterization. In this study we aimed to evaluate different clustering techniques for characterization and evaluation of Capsicum spp. accessions using combinations of specific measures for quantitative and qualitative variables. A collection of 56 Capsicum spp. accessions was characterized based on 25 morphoagronomic descriptors. Six quantitative distances were used...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum spp.; Multivariate analysis; Clustering methods; Genetic diversity; Qualitative and quantitative descriptors.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000200172

Melhoramento participativo do tomateiro sob manejo orgânico
Provedor de dados: 75
Autores: Spagnuolo,Felipe A; Gonçalves,Leandro SA; Freitas,Felipe M; Ventura,Mauricio U; Miguel,André LA; Souza,Nicholas V; Hata,Fernando T.
RESUMO A produção e o consumo de produtos agrícolas, oriundos do modelo da agricultura orgânica, vêm se expandindo ao longo dos anos. Esse modelo de agricultura necessita cada vez mais de genótipos adaptados ao seu manejo para expandir sua produção e atender as necessidades da população. Sendo assim, o melhoramento participativo tem um papel fundamental no desenvolvimento de cultivares que atendam as necessidades desse modelo. O presente trabalho teve como objetivo avaliar o desempenho de 12 linhagens de tomateiro sob dois sistemas orgânicos. Os experimentos foram conduzidos na Fazenda Escola da Universidade Estadual de Londrina (UEL) (experimento I) e em uma propriedade no distrito de Guaravera (experimento II), Londrina-PR. As seguintes linhagens foram...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Agroecologia; Agricultura familiar; Produtividade; Características físico-químicas.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000200183

Heterosis and combining ability of dual-purpose tomato hybrids developed to meet family farmers' needs in Brazil and Mozambique
Provedor de dados: 75
Autores: Graça,António JP; Amaral Júnior,Antonio T; Rodrigues,Rosana; Gonçalves,Leandro SA; Sudré,Cláudia P; Vivas,Marcelo; Melo,Paulo CT.
Brazil is the world eighth largest tomato producer and, within the country, the tomato production chain is segmented according to fruit destination: fresh consumption and processing (industrial supply). In contrast, Mozambique does not have a differentiated chain and cultivars are expected to serve both purposes. As there are no tomato breeding programs in Mozambique, cultivars used in the country come from other regions of the world, including Brazil. This paper describes the development and assessment of tomato hybrids with dual-purpose: fresh use and processing. Five tomato genotypes (B13LD, Castone, Massag-72, "Viradoro", and "Rio Grande") were crossed in complete diallel design without reciprocal, and the general and specific combining ability (GCA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Breeding; Fruit quality; Agroindustry; Processing; International cooperation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000300339

Characterization of biochemical compounds and antioxidant activity of “dedo-de-moça” chili pepper accessions
Provedor de dados: 75
Autores: Gomes,Gisely Paula; Constantino,Leonel Vinicius; Corte,Ligia Erpen-Dalla; Riger,Cristiano Jorge; Chaves,Douglas S de A; Gonçalves,Leandro SA.
ABSTRACT Capsicum baccatum is one of the main chili pepper species grown and consumed in South America. In Brazil, C. baccatum var. pendulum is widely cultivated, especially “dedo-de-moça” type. For most horticultural crops, including Capsicum species their diversity remains under-explored for traits related to fruit quality, since over the past half century breeding efforts have focused mainly on good agronomic performances. The investment in screening traits such as flavor, nutritional compounds and antioxidant content in traditional varieties is very important to support fruit quality breeding efforts. Thus, the objective of this study was accessing the variations into content of soluble solid, acidity, capsaicinoid, vitamin C, total phenolic compounds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum baccatum var. pendulum; Saccharomyces cerevisiae; Fruit quality; Plant breeding.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000400429

Genetic improvement of horticultural crops mediated by CRISPR/Cas: a new horizon of possibilities
Provedor de dados: 75
Autores: Koltun,Alessandra; Erpen-Dalla Corte,Lígia; Mertz-Henning,Liliane Marcia; Gonçalves,Leandro SA.
ABSTRACT The burden of the current global challenge involving food security lies in the need to improve crop production. In this regard, biotechnology stands out as an essential tool to generate plants able to cope with pests, diseases, and harsh climatic conditions, and more efficient in the use of natural resources. An advanced approach to create genetic variability in a precise and targeted way, the genome-editing technique CRISPR/Cas (clustered regularly interspaced short palindromic repeats/CRISPR associated proteins), has drawn the attention of breeders. The genome editing CRISPR/Cas system relies on a guiding RNA that directs a nuclease to generate a double-strand break (DSB) at a target DNA, activating the cell repair systems and eventually leading...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genome editing; Plant breeding; Biotechnology; Induced mutations; Non-transgenic.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300290

Potencial agronômico e divergência genética entre genótipos de berinjela nas condições do Caribe Colombiano
Provedor de dados: 75
Autores: Aramendiz-Tatis,Hermes; Sudré,Cláudia P; Gonçalves,Leandro SA; Rodrigues,Rosana.
Foram avaliados 24 genótipos (híbridos, cultivares e variedades locais) de berinjela quanto às características produtivas no Caribe Colombiano para quantificar a divergência genética entre estes e indicar possíveis cruzamentos. Visa-se dar início a um programa de melhoramento genético da cultura na região, considerando a divergência genética e as características agronômicas desses genótipos. Utilizou-se delineamento em blocos casualizados, com três repetições. As variáveis estudadas foram comprimento do fruto, número de frutos por planta, massa média do fruto, rendimento, firmeza do fruto e altura da planta. Os dados foram submetidos à análise de variância univariada e estatísticas multivariadas utilizando-se diferentes métodos de agrupamento hierárquico e...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum melongena; Análise multivariada; Melhoramento de plantas; Firmeza do fruto.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000200007

Combining ability and heterosis for agronomic traits in chili pepper
Provedor de dados: 75
Autores: Rodrigues,Rosana; Gonçalves,Leandro SA; Bento,Cintia dos S; Sudré,Claudia P; Robaina,Renata R; Amaral Júnior,Antonio T do.
The Capsicum breeding has been developed with emphasis in bell pepper (Capsicum annuum) and few studies are available in other species, especially C. baccatum, which has potential use not only as disease resistance source but also in obtaining new genotypes suitable for farmers' production. In the present work, the combining ability of ten C. baccatum hybrids, along with their five parentals, were tested considering 12 agronomic traits. The hybrids were produced from a complete diallel without reciprocals and assessed in greenhouse conditions, in Campos dos Goytacazes, Rio de Janeiro state, Brazil, during the period July to December 2009. The experimental design was a randomized block with three replications and the following agronomic traits evaluated:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum baccatum var. pendulum; Seed hybrid production; Diallel analysis; Griffing method; Plant breeding.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000200008

Algoritmo de Gower na estimativa da divergência genética em germoplasma de pimenta
Provedor de dados: 75
Autores: Moura,Maria da Cruz CL; Gonçalves,Leandro SA; Sudré,Cláudia P; Rodrigues,Rosana; Amaral Júnior,Antonio T do; Pereira,Telma NS.
A estimativa da variabilidade genética existente em um banco de germoplasma é importante não só para a conservação dos recursos genéticos, mas também para sua utilização no melhoramento de plantas. Os acessos de um banco são estudados com base em descritores quantitativos e qualitativos. Porém, nem sempre esses dados são analisados simultaneamente. O presente trabalho teve como objetivo estudar a divergência genética entre 56 acessos de Capsicum chinense procedentes da Coleção de Germoplasma da Universidade Estadual do Norte Fluminense Darcy Ribeiro, com base em 44 descritores morfoagronômicos, 37 qualitativos e sete quantitativos, utilizando-se a análise conjunta baseada no algoritmo de Gower. Utilizou-se o delineamento inteiramente ao acaso, com três...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum chinense; Análise multivariada; Germoplasma; Recursos genéticos vegetais.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362010000200003

Registro e proteção de olerícolas no Brasil, período de 1998 a 2014
Provedor de dados: 75
Autores: Gomes,Gisely P; Gonçalves,Leandro SA; Sekyia,Alline; Euzebio,Milena P; Robaina,Renata P; Marinho,Caillet D.
RESUMO: O presente trabalho teve como objetivos realizar um amplo levantamento do número de registros e proteções de diferentes espécies de oleráceas no Ministério da Agricultura, Pecuária e Abastecimento (MAPA) e averiguar a participação de empresas públicas e privadas. Para tanto, foram selecionadas 34 olerícolas de importância econômica e social, sendo essas divididas em tuberosas, herbáceas e frutos. Os dados para estudo foram obtidos a partir do banco de dados do registro nacional de cultivares (RNC) e do serviço nacional de proteção de cultivares (SNPC), disponível em tempo real no site do MAPA. A pesquisa foi realizada entre os períodos de 1998 a 2014. Foram constatados 7174 registros e 147 proteções, sendo as culturas do tomate, Capsicum spp....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melhoramento de plantas; Sementes; Registro nacional de cultivares (RNC); Serviço nacional de proteção de cultivares (SNPC).
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000100019

Diallel analysis of “dedo-de-moça” pepper seeds in relation to physiological potential
Provedor de dados: 75
Autores: Gomes,Gisely Paula; Zeffa,Douglas; Freiria,Gustavo Henrique; Furlan,Felipe F; Queiroz,Robison Alesandro de; Takahashi,Lúcia SA; Gonçalves,Leandro SA.
ABSTRACT “Dedo-de-moça” (Capsicum baccatum var. pendulum) is one of the main chili peppers grown worldwide. However, studies on genetics and breeding of this species are rare, when compared to other Capsicum species, manly in relation to physiological seed quality traits. In this sense, this study aimed to evaluate the combining ability of “dedo-de-moça” chili pepper in relation to physiological seed quality traits, determine the gene effects involved in the expression of these traits, and identify promising hybrid combinations. Crosses among five parents (Hortivale, Horticeres, Brs Mari, UEL 110 and UEL 111) in a full diallel mating design, resulted in 20 F1 hybrids. Griffing’s diallel model was used to estimate general and specific combining ability (GCA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum baccatum; Complete diallel; General and specific combining ability; Reciprocal effect.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000300301

Collection and morphological characterization of sweet potato landraces in north of Rio de Janeiro state
Provedor de dados: 75
Autores: Moulin,Monique M; Rodrigues,Rosana; Gonçalves,Leandro SA; Sudré,Cláudia P; Santos,Marilene H dos; Silva,José Roberto P da.
The traditional farmers play an important role in plant genetic resources conservation. Collecting the germplasm maintained by these farmers is a very important action to avoid genetic variability losses. The goals of this work were to collect sweet potato from farms in the north of Rio de Janeiro state; to gather information regarding to the farmers profile, and to characterize the sweet potato landraces collected using morphological descriptors. Fifty three farms were visited in six collection expedition and 46 accessions were collected. During the visits the farmers were interviewed using a query with ten items. Six root traits and eight descriptors for vegetative parts were used for morphological characterization. The data were analyzed based on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ipomoea batatas; Genetic resources; Traditional agriculture; Germplasm characterization; Agrobiodiversity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000200017

Snap beans for organic farming and evaluation of resistance to the common bacterial blight
Provedor de dados: 75
Autores: Andrade,Felipe A; Gonçalves,Leandro SA; Fukuji,Anderson; Miglioranza,Édison; Takahashi,Lúcia SA; Balbi-Peña,Maria I; Rodrigues,Rosana.
ABSTRACT Snap beans have been widely used in organic farming as a good income source and an alternative to diversify production, with increasing use in crop rotation. This work reports the evaluation of 25 bush-type snap beans accessions for their suitability to integrate a breeding program for organic farming, as well as for their resistance to the common bacterial blight (CBB). Agronomic performance was assessed in two field experiments (September-December, 2013; April-June, 2014), in complete blocks at random, while resistance to CBB was assessed in greenhouse, in a completely randomized trial. Plants were challenged with two isolates, one from Xanthomonas axonopodis pv. phaseoli and another from X. fuscans subsp. fuscans. Accessions UEL 402, UEL 405,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Xanthomonas axonopodis; Xanthomonas fuscans; Smallholders; Agroecology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000300385

Seed physiological potential of “dedo-de-moça” pepper in relation to maturation stages and rest periods of the fruits
Provedor de dados: 75
Autores: Gonçalves,Leandro SA; Gomes,Gisely Paula; Damasceno Junior,Clério Valentin; Queiroz,Robison Alessandro de; Takahashi,Lucia SA; Costa,Denis S da; Nunes,Maria PBA.
ABSTRACT One of the main problems in pepper seed production is the uneven maturation of the fruits due to the continuous flowering period of the plant, making it difficult to harvest all the fruits at the same time. Thus, studies on fruit maturation stage and seed physiological potential are extremely important in order to identify the appropriate harvest time, avoiding seed deterioration. The aim of this study was to evaluate the physiological potential of five genotypes of “dedo de moça” pepper seeds (Capsicum baccatum var. pendulum) in three maturation stages (green, orange and red), with and without 10-day rest period after harvest date. Physiological potential and vigor of seeds were evaluated through germination tests (first count, accelerated aging...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum baccatum var. pendulum; Accelerated aging; Germination; Vigor.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000400486

Divergência genética em tomate estimada por marcadores RAPD em comparação com descritores multicategóricos
Provedor de dados: 75
Autores: Gonçalves,Leandro SA; Rodrigues,Rosana; Sudré,Cláudia P; Bento,Cíntia dos S; Moulin,Monique M; Araújo,Maria Luiza de; Daher,Rogério F; Pereira,Telma Nair S; Pereira,Messias G.
A estimativa da variabilidade genética existente em um banco de germoplasma é importante não só para a conservação dos recursos genéticos, mas também para aplicações no melhoramento de plantas. O presente trabalho teve como objetivo estudar a divergência genética entre 78 acessos de uma coleção de germoplasma de tomateiro, com base em 74 marcadores RAPD e correlacionar esses resultados àqueles da caracterização morfoagronômica realizada para 27 descritores. Foi utilizado o agrupamento hierárquico UPGMA para analisar os dados, observando-se a formação de 13 grupos. Esses grupos foram correlacionados a cinco descritores (hábito de crescimento, tipo de folha, cor do fruto, número de lóculos e formato do fruto). Alguns grupos apresentaram peculiaridades, a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Recursos genéticos; UPGMA; Marcadores moleculares; Descritores morfológicos.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362008000300014

Determining the inheritance of agronomic traits in chili pepper
Provedor de dados: 75
Autores: Bento,Cíntia S; Rodrigues,Rosana; Sudré,Cláudia P; Medeiros,Artur M; Mathias,Vinícius AS; Gonçalves,Leandro SA.
ABSTRACT The Capsicum genus is widely studied in many countries but most of research focuses on C. annuum. Although its importance as potential genetic resource for breeding to disease resistance and fruit quality, studies on genetics and breeding in C. baccatum var. pendulum are still scarce and it still remains as an underexploited crop. This paper aimed to study the inheritance of agronomic characteristics, to estimate the genetic parameters for seven agronomic traits in C. baccatum var. pendulum, using generation mean analysis and to verify the existence of major genes and polygenes with additive and non-additive effects, using the method of maximum likelihood with the aid of Monogen software. The agronomic traits evaluated were: number of fruits per...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum baccatum var. pendulum; Genetic control; Heritability; Major gene; Additive-dominant model; Segregating generation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000300367

Genetic resources of vegetable crops: a survey in the Brazilian germplasm collections pictured through papers published in the journals of the Brazilian Society for Horticultural Science
Provedor de dados: 75
Autores: Sudré,Cláudia P; Leonardecz,Eduardo; Rodrigues,Rosana; Amaral Júnior,Antônio T do; Moura,Maria da CL; Gonçalves,Leandro SA.
The research on plant genetic resources is essential for the conservation of genetic diversity and accessions' divergence studies, as a basis for plant breeding. Aiming to know the state of art in this subject, a historical survey was carried out in Revista de Olericultura and in Horticultura Brasileira, from 1961 to 2006, searching for papers dealing with vegetable crops genetic resources. In each of the papers, the species studied, first author institution, publication year, applied software, number of accessions and descriptors, and the multivariate techniques used were registered. Based on these characteristics, papers were grouped using multivariate analysis. Sixty-one papers dealt somehow with genetic resources in the time covered by the survey, from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Review; Multivariate analysis; Diagnosis; Genetic diversity; Vegetables.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362007000400002