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| Registros recuperados: 36 | |
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| Carvalho,Juliana Avelar de; Jesus,Jeferson Gonçalves de; Araujo,Kelly Lana; Serafim,Milson Evaldo; Gilio,Thiago Alexandre Santana; Neves,Leonarda Grillo. |
| Abstract The stem rot and fusarium vascular wilt are among the main factors the most limiting the passion fruit cultivation in the State of Mato Grosso. This study aimed to evaluate the resistance / susceptibility of the genus Passiflora species to soil pathogens from different biomes of Mato Grosso (Cerrado, Pantanal and Amazon). The part I evaluated the response of P. edulis Sims, P. foetida, P. nitida and P. quadrangularis on eight isolates of F. solani. In part II was evaluated the genotypes P. edulis Sims, P. mucronata, P. foetida, P. nitida and P. morifolia on three isolates of F. oxysporum f. sp. passiflorae. The experimental design was randomized blocks in factorial arrangement (genotypes x isolates). The statistical analysis used for both steps... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Collar rot; Fusariosis disease; Genetic breeding; Passiflora ssp. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452021000100401 |
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| Alves,Rafael Moysés; Chaves,Saulo Fabrício da Silva; Oliveira,Raimundo Parente de; Pedroza Neto,Jack Loureiro; Sebbenn,Alexandre. |
| Abstract This study aimed to use the canopy replacement technique to reduce the field evaluation time and to select promising cupuassu tree clones. The study was carried out under field conditions using fifteen-year-old trees. The crowns were replaced using 16 treatments (clones). The experiment was conducted using randomized blocks design with 18 replicates and one plant per plot, during a period of ten years. The following variables were evaluated: average number of fruits, fruit, seed and pulp production (kg/plant) and symptoms of “witches broom” disease. The data were checked for normality followed by analysis of variance. The results highlighted clones 32, 42, 44, 46, 47, 61, 62, 63 and 64, presenting characteristics such as productivity, tolerance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Theobroma grandiflorum; Genetic breeding; Clone selection; Over grafting; Witch broom. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000401003 |
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| Grisi,Mara Cecília de Mattos; Junqueira,Nilton Tadeu Vilela; Conceição,Leo Duc Haa Carson Schwartzhaupt da; Faleiro,Fábio Gelape; Braga,Marcelo Fideles; Vilela,Michelle Souza. |
| Abstract The interspecific introgression of resistance genes to diseases in commercial varieties through interspecific crosses has been adopted as a strategy in breeding programs of sour passion fruit. This work aimed to evaluate 11 progenies of multispecific hybrids obtained from crosses involving seven Passiflora species, in addition to four commercial cultivars, using the REML/BLUP method. The experiment was carried out as a randomized block design with six repetitions and three plants per plot. Ten fruit traits were evaluated. The additive, multiplicative, and sum of ranks indexes were applied to determine the most appropriate selective strategy in the simultaneous increase of fruit weight, number of fruits, and yield. Plants from the 325 x VAO... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passion fruit; Genetic breeding; Genetic gain; Plant selection. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452021000100802 |
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| Yamamoto,Paula Yuri; Colombo,Carlos Augusto; Azevedo Filho,Joaquim Adelino; Lourenção,André Luiz; Marques,Márcia Ortiz Mayo; Morais,Guilherme Domingues da Silva; Chiorato,Alisson Fernando; Martins,Antônio Lúcio Mello; Siqueira,Walter José. |
| Lippia alba (Verbenaceae) is a shrub whose essential oil has important biological, pharmacological, and aromatizing properties. To reach the sustained cultivation of new species with economic potential, the present study aimed to evaluate L. alba performance for fresh leaf matter (FM), leaf dry matter (DM), virus symptoms (VS - Cucumber mosaic virus, CMV), oil yield (OY), and oil chemical composition (OC), and to evaluate DM stability and adaptability. Ten genotypes of four chemical groups (chemotypes) were evaluated in six experiments designed as randomized blocks with two plants per plot, over the whole State of São Paulo, Brazil. A 2.0 x 0.4 x 1.6 m spacing was used in Monte Alegre do Sul and Pindorama, while a 1.0 x 0.4 x 0.6 m spacing was used in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: G x E interaction; Phenotypic stability; Sustainable agriculture; Genetic breeding; Clonal selection. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000500006 |
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| SILVA,Jonny Lucio Sousa; MOURA,Elisa Ferreira; ILKIU-BORGES,Fernanda; GALVÃO,Jessivaldo Rodrigues; FARIAS-NETO,João Tomé de; SILVA,Gisele Barata da; RÊGO,Marcela Cristiane Ferreira; CUNHA,Roberto Lisboa. |
| ABSTRACT Cassava is an important culture in Brazil and in the North of the country, and soft root rot has affected root production. The aim of this work was to identify root morphoanatomic and histochemical characters associated with root rot resistance. In areas with no occurrence of the disease, nine cassava genotypes were tested, four of which were resistant, and five were susceptible to root rot. Root harvest was carried out twelve months after sowing, and thickness of suber, suber and cortex, and secondary xylem were measured. Moreover, texture, suber cell layers, lignin content, and lignin monomers content of the portion suber and cortex were analyzed. Also, histochemical tests and scanning electron microscopy (SEM) analyses of the roots were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Morphological characterization; Genetic breeding; Manihot esculenta. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000100001 |
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| ALVES,Rafael Moysés; CHAVES,Saulo Fabrício da Silva; GAMA,Marcos André Piedade; PEDROZA NETO,Jack Loureiro; SANTOS,Thalita Gomes dos. |
| ABSTRACT This study aimed to evaluate and select progenies and matrices of cupuassu-tree siblings, and to select Brazilian mahogany matrices with superior characteristics to be used in agroforestry systems (AFS). Twenty-five full cupuassu tree sibling progenies and one Brazilian mahogany half-sibling progeny were evaluated. The study was conducted for 14 years in a commercial property in Tomé Açu, Pará State, Brazil. The number of fruits and fruit yield per plant, as well as the rate of plants with symptoms of witches’ broom disease, were used as response variables for cupuassu. For mahogany, the following response variables were used: total height, commercial height, crown height, diameter at breast height and commercial wood volume. There were five... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Theobroma grandiflorum; Swietenia macrophylla; Genetic breeding; Intercropping. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000300183 |
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| Cavalcante, Marcelo; UFAL; Ferreira, Paulo Vanderlei; UFAL; Paixão, Stênio Lopes; UFAL; Costa, João Gomes da; EMBRAPA; Pereira, Rodrigo Gomes; UFAL; Madalena, José Antônio; UFAL. |
| Com o objetivo de avaliar os potenciais produtivo e genético de clones de batata-doce, visando à seleção de materiais genéticos mais produtivos, com caracteres que facilitem o manejo, foi desenvolvido um experimento, no ano de 2007, composto por nove clones e duas variedades, no delineamento em blocos casualizados, com três repetições. Avaliaram-se seis características da parte aérea e quatro das raízes. O clone 6 obteve a maior produtividade de raiz comercial, com 12,08 t ha-1. Os clones 8, 14 e a variedade Rainha Prata apresentaram as maiores produtividades de fitomassa da parte aérea, com 5,42; 5,17 e 5,83 t ha-1, respectivamente. O clone 11, além de produzir 9,08 t ha-1 de raiz comercial e 4,02 t ha-1 de fitomassa da parte aérea, apresentou também... |
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Palavras-chave: 5.01.00.00-9 Agronomia Ipomoea batatas; Melhoramento genético; Parâmetros genéticos; Genótipos Ipomoea batatas; Genetic breeding; Genetic parameters; Genotypes. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/835 |
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| Ferreira, Fábio Medeiros; Universidade Federal do Amazonas - Instituto de Ciências Exatas e Tecnologia em Itacoatiara; Neves, Leonarda Grillo; Universidade Estadual do Mato Grosso - Departamento de Agronomia; Bruckner, Claudio Horst; Universidade Federal de Viçosa - Departamento de Fitotecnia; Viana, Alexandre Pio; Universidade Estadual do Norte Fluminense - Laboratório de Melhoramento Genético Vegetal; Cruz, Cosme Damião; UFV; Barelli, Marco Antonio Aparecido; Unemat. |
| No presente estudo, objetivou-se formar supercaracteres para seleção simultânea de variáveis relacionadas à produção e qualidade dos frutos em famílias de irmãos completos e, ou, meios-irmãos de maracujazeiro amarelo (Passiflora edulis f. flavicarpa). Avaliaram-se 113 famílias e 11 variáveis, no Delineamento I de Comostock e Robinson, em blocos ao acaso com três repetições. A análise de fatores estabeleceu três supercaracteres: tamanho do fruto (TF), produtividade (PROD) e rendimento de indústria (RI). Para grande maioria das variáveis originais, foram verificados sinais de cargas fatoriais que refletem o verdadeiro sentido da seleção em programas de melhoramento de maracujá. Detectou-se variabilidade genética nos níveis hierárquicos de genitor masculino e... |
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Palavras-chave: Agronomia Passiflora edulis f. flavicarpa; Seleção simultânea; Análise multivariada; Melhoramento genético Melhoramento Vegetal Passiflora edulis f. flavicarpa; Simultaneous selection; Multivariate analysis; Genetic breeding. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3328 |
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| Kopp,Mauricio Marini; Luz,Viviane Kopp da; Souza,Velci Queiróz de; Coimbra,Jefferson Luis Meirelles; Sousa,Rogério Oliveira de; Carvalho,Fernando Irajá Félix de; Oliveira,Antonio Costa de. |
| The occurrence of anaerobic conditions in hydromorphic soils favors the development of anaerobic microorganisms that produce phytotoxic substances representing primarily by organic acids. The selection of promising oat (Avena sativa L.) genotypes for use in those situations requires field evaluations that can be cumbersome, making hydroponics a viable alternative. The objective of this work was to adjust a methodology to use in studies of tolerance to organic acids in oat under hydroponic systems. For such goal, the best germination system was determined in order to reduce the seedling initial establishment effects under hydroponics, the ideal concentration for screening genotypes and the best variable for stress evaluation. It was found that the most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytotoxicity; Levels; Abiotic stress; Genetic breeding. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300003 |
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| Leroy,Thierry; Ribeyre,Fabienne; Bertrand,Benóit; Charmetant,Pierre; Dufour,Magali; Montagnon,Christophe; Marraccini,Pierre; Pot,David. |
| Coffee quality, in the present context of overproduction worldwide, has to be considered as a main selection criterion for coffee improvement. After a definition of quality, and an overview of the non genetic factors affecting its variation, this review focuses on the genetic factors involved in the control of coffee quality variation. Regarding the complexity of this trait, the different types of quality are first presented. Then, the great variation within and between coffee species is underlined, mainly for biochemical compounds related to quality (caffeine, sugars, chlorogenic acids, lipids). The ways for breeding quality traits for cultivated species, Coffea arabica and Coffea canephora are discussed, with specific challenges for each species. For C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea spp.; Biochemical compounds; Candidate genes; ESTs; Genetic breeding; Marker-assisted selection; Quality. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100016 |
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| Barbosa,Julierme Zimmer; Ferreira,Carla Fernanda; Santos,Nicolas Zendonadi dos; Motta,Antonio Carlos Vargas; Prior,Stephen; Gabardo,Juarez. |
| ABSTRACT Changes in quantity and quality of corn crop stover can have a large impact on soil conservation and soil carbon (C) sequestration over large areas. The aim of this study was to evaluate changes in production, concentration and amount of C and nitrogen (N) in corn stover fractions due to cultivar development. Two field experiments were conducted in the city of Rolândia (Paraná State, Brazil) using ten cultivars representing five technological levels: single cross hybrids, double or triple hybrids, commercial varieties, and creole cultivars. Plant heights and stalk, leaf, cob, husk and tassel weights were determined at final harvest. Elemental C and N analyses were performed in triplicate for each stover fraction. In general, the creole cultivars... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C/N ratio; Genetic breeding; No-tillage system; Integrated crop-livestock systems; Renewable energy. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000600665 |
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| Guedes,Fernando Lisboa; Souza,João Cândido de; Costa,Emiliano Fernandes Nassau; Reis,Matheus Costa dos; Cardoso,Gustavo Andrade; Ematné,Hugo Junqueira. |
| Maize crops in Brazil have a wide diversity of management systems. There is a large contingent of family agriculture, which uses little or no agricultural inputs, compared to the rural enterprise which uses the most modern production systems. This difference in the management systems is particularly noticeable in relation to consumption of fertilizers, especially nitrogenous ones. Therefore it is necessary to obtain plants with efficient nitrogen (N) use that also respond to applied nitrogen. Thus, the aim of the study was to evaluate the performance of S0:1 progenies, in top crosses, under two nitrogen levels and select the best ones based on responsiveness and efficiency. Sixty seven S0:1 progenies from populations of single cross hybrids were crossed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic breeding; Zea mays; S0:1 progenies; Tester; Abiotic stress. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600011 |
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| Registros recuperados: 36 | |
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