Consulta: subjectFacets:"Genetic breeding"
Registros recuperados: 36
Data/hora: 02/06/2024 10:54:09

Genetic control of Eucalyptus urophylla and E. grandis resistance to canker caused by Chrysoporthe cubensis
Provedor de dados: 74
Autores: Guimarães,Lúcio Mauro da Silva; Resende,Marcos Deon Vilela de; Lau,Douglas; Rosse,Leonardo Novaes; Alves,Alexandre Alonso; Alfenas,Acelino Couto.
Chrysophorte cubensis induced canker occurs in nearly all tropical and subtropical regions where eucalypts are planted, causing losses in both wood quality and volume productivity, especially so in the warmer and more humid regions of Brazil. The wide inter and intra-specific genetic variability of resistance to canker among Eucalyptus species facilitates the selection of resistant plants. In this study, we evaluated resistance to this pathogen in five Eucalyptus grandis (G) and 15 E. urophylla (U) trees, as well as in 495 individuals from 27 progenies derived from crosses between the trees. In the field, six-months-old test seedlings were inoculated with C. cubensis. Lesion length in the xylem and bark was measured eight months later. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic resistance; Genetic breeding; Eucalypt and interspecific hybrids.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300024

Experience with Descriptors, Registration and Protection of vegetable cultivars: eggplant as a case study
Provedor de dados: 75
Autores: Carvalho,Sabrina IC; Reifschneider,Francisco JB; Ribeiro,Cláudia SC; Bianchetti,Luciano B; Fernandez,Francisco L.
ABSTRACT The Registro Nacional de Cultivares [RNC (National Register of Cultivars)] and the Serviço Nacional de Proteção de Cultivares [SNPC (National Service for Cultivar Protection)] were established by the Ministry of Agriculture, Livestock and Food Supply (MAPA) in 1997. The registration of a cultivar in the RNC allows the production, processing and commercialization of seeds in the country. The right of commercial exploitation, assured by the protection of a cultivar in the SNPC, allows the allocation of resources to public and private breeding programs, and the subsequent launching of new cultivars. The authors’ experience with the theme and its relevance to the public and private sectors provided the base for this article, thus sharing the elements...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum melongena; Intellectual property; Seeds; Morphological characterization; Genetic breeding.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000200146

Repeatability and heritability of production characters in strawberry fruits
Provedor de dados: 75
Autores: Andrade Júnior,Valter C; Oliveira,Altino JM; Guimarães,Amanda G; Ferreira,Marcos Aurélio M; Cavalcanti,Vytória P; Fernandes,José Sebastião C.
ABSTRACT The estimation of repeatability coefficient provides support to define the number and the appropriate period of genotype evaluations, obtaining better success in breeding programs, in order to lower labor costs. Therefore, knowing repeatability and heritability parameters is relevant. Thus, the aim of this study was to estimate the repeatability and heritability coefficients and accurately determine the number of measurements. Eight strawberry cultivars were analyzed in a randomized block design with four replicates and eighteen plants per plot, being harvested twice a week over a period of six months (May to October, 2012), totalizing six evaluations. Among the evaluated traits, the estimated heritabilities ranged from 3.13% (number of fruits) to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fragaria x ananassa; Genetic breeding; Number of measurements.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000100089

Selection of processing tomato genotypes resistant to two spotted spider mite
Provedor de dados: 75
Autores: Zanin,Daniel S; Resende,Juliano TV; Zeist,André R; Oliveira,João RF; Henschel,Juliane M; Lima Filho,Renato B.
ABSTRACT One of the major problems in cultivation of tomato is the occurrence of pests and diseases. The objective of the research was to select genotypes from the second generation of the first backcross (F2BC1) between the tomato cultivar for processing S. lycopersicum (cv. Redenção) and the wild access S. habrochaites var. hirsutum (PI-127826), with high levels of zingiberene (ZGB), resistant to the twospotted spider mite Tetranychus urticae (Acari: Tetranychidae). From the F2BC1 population. The ZGB content was quantified and five plants with high zingiberene selected (RVTZ 2011-079-117, RVTZ 2011-079-185, RVTZ 2011-079-335, RVTZ 2011-079-345 and RVTZ 2011-079-503) and four with low zingiberene content (RVTZ 2011-079-417, RVTZ 2011-331-460, RVTZ...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Solanum habrochaites var. hirsutum; Tetranychus urticae; Genetic breeding; Zingiberene.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000200271

BRS Tui: a new Biquinho-type pepper cultivar released by Embrapa
Provedor de dados: 75
Autores: Ribeiro,Cláudia S da C; Carvalho,Sabrina Isabel C de; Heinrich,Ana Gláucia; Reifschneider,Francisco José B.
ABSTRACT The orange-fleshed Biquinho pepper type cultivar BRS Tui was developed by Embrapa Hortaliças to meet the demands of fresh fruit and processing agroindustry of preserves, jellies, flavored oils and vinegar markets. Its fruits are very aromatic, tasty, and crunchy. It is resistant to important diseases, and presents high yield, uniformity and fruit quality. Moreover, ‘BRS Tui’ fruits are sweet and serve consumers who do not consume hot peppers because of their pungency.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum chinense; Processing; Diseases resistance; Genetic breeding.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000400526

Spiked pepper: selection of clones toward cropping on the edaphoclimatic conditions from Belém, Brazil
Provedor de dados: 75
Autores: Gaia,José Maria D; Mota,Milton Guilherme da C; Conceição,Carmen Célia C da; Maia,José Guilherme S.
Spiked pepper presents a high yield of essential oil with useful biological properties for human health and agriculture. In order to evaluate the morphoagronomic variability and, afterwards, to select genotypes for plant breeding and cultivation, thirteen clones were propagated. Thus, spiked pepper cuttings were rooted under greenhouse, transferred to a nursery and, afterwards, planted at the experimental area. The evaluations were carried out in two harvest seasons. The evaluated morphoagronomic traits were number of leaves per branch, leaf length, leaf width, diameter of the oldest branch, plant height, number of orthotropic branches, number of plagiotropic branches, internode length, fresh and dry matter, yield of essential oil and dillapiole content....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piper aduncum L.; Genetic resources; Conservation of germplasm; Morphoagronomic traits; Genetic breeding.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362010000400007

BRS F63 (Camila): A fresh market potato cultivar, with high yield potential and resistance to virus Y
Provedor de dados: 75
Autores: Pereira,Arione S; Silva,Giovani O; Bertoncini,Odone; Castro,Caroline M; Bortoletto,Antonio C; Hirano,Elcio; Azevedo,Fernanda Q; Lima,Mirtes F; Gomes,Cesar B; Dutra,Leonardo F; Suinaga,Fabio A; Carvalho,Agnaldo DF; Melo,Paulo E; Lopes,; Carlos A; Reisser Junior,Carlos; Pinheiro,Jadir B; Medeiros,Carlos AB; Krolow,Ana CR; Castro,Luis AS; Nazareno,Nilceu RX de.
ABSTRACT Camila potato, registered and protected as BRS F63, is a cultivar for the fresh market, with oval tubers of attractive appearance, having shallow eyes, yellow and smooth skin, and light yellow flesh. It presents medium specific gravity (dry matter), which allows greater culinary versatility than ‘Agata’. Cooked tubers have a firm texture and distinctive flavor, with potential for use even in gourmet kitchen, for preparing salads and other similar dishes. The vegetative growth cycle and dormancy are medium. It presents high productive potential, with high percentage of marketable tubers. It is moderately resistant to greening. Concerning physiological disorders in the tubers, ‘BRS F63’ (Camila) is similar to ‘Agata’ and ‘Asterix’ in crops of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Genetic breeding; PVY; Variety.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100136

Collecting and evaluation of germplasm of spiked pepper from Brazilian Amazon
Provedor de dados: 75
Autores: Gaia,José Maria D; Mota,Milton Guilherme da C; Conceição,Carmen Célia C da; Maia,José Guilherme S.
Spiked pepper (Piper aduncum L.) is an aromatic plant species with high essential oil production. It is a species that occurs abundantly in the Brazilian Amazon. Its essential oil has exploitable biological properties in the human health and agriculture. Aiming to study its germplasm toward future use in genetic breeding programs, collecting was carried out (inflorescences, cuttings, leaves and thin branches) in ten provenances from the Brazilian Amazon. Twelve morphoagronomic traits were determined to take the data: number of leaves by branch, length of leaf, width of the leaf, circumference of the older branch, height of the plant, number of orthotropic branches, number of plageotropic branches, length of the internodes, number of spikes per branches,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piper aduncum L.; Genetic resources; Conservation of germplasm; Morphoagronomic traits; Genetic breeding.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362010000200004

Aspectos básicos do cultivo do coqueiro (Cocos nucifera L.).
Provedor de dados: 14
Autores: ALVES, R. M.; MÜLLER, A. A.
bitstream/item/190948/1/Aspectos-basicos.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivo; Melhoramento genético; Coconut; Cultivation; Production cost; Genetic breeding; Harvest; Coco; Cocos Nucifera; Colheita; Custo de Produção.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374719

A cultura do milho na Amazônia.
Provedor de dados: 14
Autores: PEREIRA, O. G.
bitstream/item/69744/1/IPEAN-Fitotecnia1.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivo; Melhoramento genetico; Brasil; Maize; Cultivation; Genetic breeding; Cultural practices; Yield; Harvest.; Colheita; Milho; Pesquisa; Polinização; Pratica Cultural; Produtividade.; Plantio; Amazonia; Pollination; Planting; Research.
Ano: 1971
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376203

Parâmetros genéticos de características produtivas de búfalos (Bubalus bubalis L.) leiteiros.
Provedor de dados: 14
Autores: MARQUES, J. R. F.; LOURENCO JUNIOR, J. de B.; CARVALHO, L. O. D. de M.; NASCIMENTO, C. N. B. do; COSTA, N. A. da; BARBOSA, C.; BATISTA, H. A. M.; RIBEIRO, M. J. P. da S. de S.; RAMOS, A. de A.; PIMENTEL, E. S.
bitstream/item/32060/1/CPATU-BP123.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bubalino; Melhoramento genetico; Herdabilidade; Repetibilidade; Buffalo; Genetic breeding; Repeatibility.; Genética.; Heritability.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379790

Características da produção leiteira em búfalos (Bubalus bubalis L.).
Provedor de dados: 14
Autores: MARQUES, J. R. F.; NASCIMENTO, C. N. B. do; CARVALHO, L. O. D. de M.; LOURENÇO JUNIOR, J. de B.; COSTA, N. A. da; BATISTA, H. A. M.; RIBEIRO, M. J. P. da S. de S.; BARBOSA, C.; RAMOS, A. de A.; PIMENTEL, E. S.
bitstream/item/41643/1/Boletim-Pesquisa-121-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Percentagem; Fonte de variação; Bubalino; Característica; Estatística descritiva; Melhoramento genético; Fat percentage; Genetic breeding; Management; Sources of variation; Buffalo; Characteristic.; Animal; Gordura; Leite; Lactação; Manejo.; Lactation; Milk; Statistics.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383556

Melhoramento genético de bovinos na Amazônia.
Provedor de dados: 14
Autores: MARQUES, J. R. F.
Por que melhorar o rebanho? O que melhorar? Considerações sobre o que melhorar. Como melhorar? Porque cruzar? Por que inseminar? Cruzamento s recomendados. Seleção. Escolha de reprodutores. Escolha de matrizes. Formação de algumas racas nacionais. Esquemas gerais de cruzamentos.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Melhoramento genético; Brasil; Bovine; Genetic breeding; Selection.; Bovino; Cruzamento; Seleção.; Amazonia; Crossing.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/387581

Melhoramento genético das raças gir e guzera pelo teste de progenie.
Provedor de dados: 14
Autores: VERNEQUE, R. da S.; TEODORO, R. L.; MARTINEZ, M. L.
bitstream/item/82855/1/Melhoramento-genetico-das-racas.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Melhoramento genetico; Genetic breeding; Progeny test.; Animal; Teste de Progênie.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/593348

Apport d'un programme de génétique à une filière de production aquacole : l'exemple de l'ostréiculture
Provedor de dados: 5
Autores: Lapegue, Sylvie; Bedier, Edouard; Goyard, Emmanuel; Degremont, Lionel; Baud, Jean-pierre; Gerard, Andre; Goulletquer, Philippe; Boudry, Pierre.
Two oyster species are currently present along the French coasts : the indigenous European flat oyster (Ostrea edulis), and the Pacific cupped oyster (Crassostrea gigas), that has been introduced from Japan since the beginning of the 70ies. The flat oyster successively suffered from two protozoan diseases during the 60ies and its production decreased from 20 000 tons/year by that time to 1 500 tons/year nowadays. Consequently, the oyster production is principally (99%) based upon the Pacific oyster species with approximately 150 000 tons/year among which 90% are grown from the natural spat. However, the hatchery production of this species is developing and was estimated to 400 to 800 millions spat in 2002. Moreover, strengthened relationships between...
Tipo: Text
Palavras-chave: Growth; Selection; Genetic breeding; Genetic; Ostrea edulis; Crassostrea gigas; Oysters; Croissance; Sélection; Amélioration génétique; Génétique; Ostrea edulis; Crassostrea gigas; Huîtres.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2003/acte-3491.pdf

Divergência genética entre progênies de polinização aberta de Pinus caribaea var. hondurensis a partir de caracteres quantitativos
Provedor de dados: 190
Autores: Santos, Wanderley dos; Araújo, Elton Gean; Souza, Danilla Cristina Lemos; Silva, Janaína Rodrigues da; Recco, Camila Regina Silva Baleroni; Moraes, Mário Luiz Teixeira de; Aguiar, Ananda Virginia de.
Este trabalho foi realizado com o objetivo de estimar a divergência genética entre progênies de Pinus caribaea var. hondurensis, por meio de caracteres quantitativos. O experimento foi instalado em delineamento látice 10 x 10, triplo, com 100 tratamentos (96 progênies oriundas de polinização aberta de um pomar clonal da espécie e quatro testemunhas). Foram avaliados os caracteres: diâmetro a 1,30 m do solo, altura total de planta, volume cilíndrico, produção de resina total e resina por área de painel. Utilizou-se a distância generalizada de Mahalanobis (D2) e o método de otimização de Tocher. A maior distância genética observada entre as progênies foi de 100% (D2 = 65,51) e a menor foi de 0,09% (D2 = 0,15). O caractere volume foi o que mais contribuiu...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic breeding; Generalized Mahalanobis distance; Tocher optimization Recursos Florestais; Engenharia Florestal; Botânica; Genética Vegetal; Melhoramento genético; Distância generalizada de Mahalanobis; Otimização de Tocher.
Ano: 2016
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/920

Genetic parameters and agronomic evaluation of cassava genotypes
Provedor de dados: 86
Autores: Silva,Rodrigo de Souza; Moura,Elisa Ferreira; Farias Neto,João Tomé de; Sampaio,José Edson.
Abstract: The objective of this work was to estimate genetic parameters and predict genetic values for the selection of cassava (Manihot esculenta) genotypes in the state of Pará, Brazil. The trial was performed with 56 genotypes in two growing seasons (2012/2013 and 2013/2014), in the municipality of Igarapé-Açu, in the state of Pará, using the augmented blocks design with two control treatments. The evaluated traits were: plant shoot weight (PSW), number of roots per plant (NRP), number of rotten roots per plant (NRRP), fresh root yield (FRY), harvest index (HI), and starch content in the roots (SCR). The restricted maximum likelihood (REML) and best linear unbiased prediction (BLUP) methods were used. There was genetic variability among genotypes for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manihot esculenta; Genetic breeding; Genetic variability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000700834

Carbon isotope fractionation for cotton genotype selection
Provedor de dados: 86
Autores: Brito,Giovani Greigh de; Suassuna,Nelson Dias; Diola,Valdir; Sofiatti,Valdinei; Ducatti,Carlos; Silva,Evandro Tadeu da; Morello,Camilo de Lelis.
The objective of this work was to evaluate the carbon isotope fractionation as a phenomic facility for cotton selection in contrasting environments and to assess its relationship with yield components. The experiments were carried out in a randomized block design, with four replicates, in the municipalities of Santa Helena de Goiás (SHGO) and Montividiu (MONT), in the state of Goiás, Brazil. The analysis of carbon isotope discrimination (Δ) was performed in 15 breeding lines and three cultivars. Subsequently, the root growth kinetic and root system architecture from the selected genotypes were determined. In both locations, Δ analyses were suitable to discriminate cotton genotypes. There was a positive correlation between Δ and seed-cotton yield in SHGO,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium; Carbon isotope discrimination; Genetic breeding; Phenotyping.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000900673

Mating system parameters in a high density population of andirobas in the Amazon forest
Provedor de dados: 86
Autores: Campos,Tatiana de; Cunha,Marcia Oliveira da; Sousa,Adna Cristina Barbosa de; Teixeira,Renata Beltrão; Raposo,Andrea; Sebbenn,Alexandre Magno; Wadt,Lucia Helena de Oliveira.
The objective of this work was to estimate the mating system parameters of a andiroba (Carapa guianensis) population using microsatellite markers and the mixed and correlated mating models. Twelve open‑pollinated progeny arrays of 15 individuals were sampled in an area with C. guianensis estimated density of 25.7 trees per hectare. Overall, the species has a mixed reproductive system, with a predominance of outcrossing. The multilocus outcrossing rate (t m = 0.862) was significantly lower than the unity, indicating that self‑pollination occurred. The rate of biparental inbreeding was substantial (t m ‑ t s = 0.134) and significantly different from zero. The correlation of selfing within progenies was high (r s = 0.635), indicating variation in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carapa guianensis; Allogamy; Conservation; Genetic breeding; Microsatellite; Population size.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000500006

Performance of food-type soybean genotypes and their possibility for adaptation to Brazilian latitudes
Provedor de dados: 86
Autores: Guerra,Edson Perez; Destro,Deonisio; Miranda,Lilian Azevedo; Montalván,Ricardo.
This work was conducted at the Universidade Estadual de Londrina (UEL), in Londrina, State of Paraná, Brazil, with the goal to study food-type soybean (Glycine max (L.) Merrill) genotypes performance for use in cultivation or crosses. A total of 104 genotypes were analyzed: 88 were food-type with large seeds, eight were food-type with small seeds, and eight-grain types adapted cultivars. The experimental plan was in randomized complete block design with four replications, and 12 traits of agronomic importance were considered. Genetic diversity was observed in the food-type germplasm. There were some genotypes with high yield adapted to a normal period of sowing. Soybean genetic improvement programs for direct human consumption in Brazil, either by means of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomic characters; Genetic breeding; Germplasm; Glycine max.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000400008

Passion Fruit (Passiflora spp.) species as sources of resistance to soil phytopathogens Fusarium solani and Fusarium oxysporum f. sp. Passiflorae complex
Provedor de dados: 94
Autores: 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

Canopy replacement used in the evaluation of cupuassu tree genotypes in the state of Pará
Provedor de dados: 94
Autores: 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

Genotypic selection of multispecific hybrids obtained through crosses between commercial Passiflora edulis and wild passiflora species
Provedor de dados: 94
Autores: 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

RESISTANCE TO ALTERNARIA BROWN SPOT OF NEW CITRUS HYBRIDS
Provedor de dados: 94
Autores: CAMPOS,KELLY APARECIDA FERNANDES DE; AZEVEDO,FERNANDO ALVES DE; BASTIANEL,MARINÊS; CRISTOFANI-YALY,MARIÂNGELA.
ABSTRACT  Alternaria brown spot (ABS) disease is caused by the fungus of Alternaria alternata f. sp. citri, which causes injury in leaves, branches and fruits of citrus. The action of the pathogen is directly related to the presence of toxin receptors in susceptible genotypes. The objective of this study was to characterize a population of citrus hybrids obtained from controlled crosses between Pêra de Abril sweet orange and the hybrid of Murcott tangor x Pêra sweet orange (TM x LP 163) for response to ABS through the in vitro inoculation of fungal spores in young detached leaves. The fungus was isolated from the lesions of Murcott tangor fruits that exhibited ABS symptoms. Two hundred thirty-five hybrids were evaluated, and 70 (30%) showed different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternaria alternata; Genetic breeding; Murcott tangor; Pêra de Abril; Sweet orange.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000500404

Evaluation of sunflower cultivars for central Brazil
Provedor de dados: 63
Autores: Porto,Willyam Stern; Carvalho,Claudio Guilherme Portela de; Pinto,Ronald José Barth; Oliveira,Marcelo Fernandes de; Oliveira,Ana Cláudia Barneche de.
Despite a large availability of areas suitable for sunflower cropping in Central Brazil, few adapted cultivars are available in the market. The objective of this work was to select sunflower cultivars adapted to this important production region. Experimental data from 2000 to 2004 were obtained by the National Sunflower Trials, coordinated by Embrapa Soja. The evaluated traits were grain and oil yields. Two criteria were used for selection of cultivars: i) the general mean obtained from different environments; ii) partitioning of general mean in favorable and unfavorable environments. Partitioning of the general mean allowed to detect the specific environment indicated for each cultivar. For grain yield, the cultivar Helio 251 presented general indication,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus; Genetic breeding; Interaction genotypes &amp;times; Environments.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000200005

Sources of resistance to Crinipellis perniciosa in progenies of cacao accessions collected in the Brazilian Amazon
Provedor de dados: 63
Autores: Paim,Valéria Rodrigues Lavigne de Mello; Luz,Edna Dora Martins Newman; Pires,José Luís; Silva,Stela Dalva Vieira Midlej; Souza,Jorge Teodoro de; Albuquerque,Paulo Sérgio Bevilaqua; Santos Filho,Lindolfo Pereira dos.
The witches' broom disease caused by the fungus Crinipellis perniciosa is the main phytossanitary constraint for cacao production in Brazil. The integrated management of the disease involves resistance as one of the components. The breeding program conducted by the Brazilian Institution, CEPLAC is directed toward the pyramidation of resistance genes from different sources to achieve a more durable resistance. This study aimed to identify sources of resistance in progenies of cacao accessions collected in the basins of ten Amazonian rivers and compared to progenies from the Peruvian clones 'Scavina 6' and 'Sacavina 12'. Progenies from 40 Amazonian accessions and 'Scavina' were evaluated in the field for six years for witches' broom resistance through...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Theobroma cacao; Genetic breeding; Resistance; Witches' broom disease.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600011

Performance of ginger grass (Lippia alba) for traits related to the production of essential oil
Provedor de dados: 63
Autores: 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

Morphoanatomy and histochemistry analyses of cassava roots do not discriminate resistant from susceptible genotypes to soft root rot
Provedor de dados: 36
Autores: 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

Simultaneous selection of cupuassu tree and Brazilian mahogany genotypes in an agroforestry system in Pará state, Brazil
Provedor de dados: 36
Autores: 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

Potenciais produtivo e genético de clones de batata-doce - DOI: 10.4025/actasciagron.v31i3.835
Provedor de dados: 1
Autores: 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...
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

Formação de supercaracteres para seleção de famílias de maracujazeiro amarelo - DOI: 10.4025/actasciagron.v32i2.3328
Provedor de dados: 1
Autores: 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...
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

Methodology adjustments for organic acid tolerance studies in oat under hydroponic systems
Provedor de dados: 52
Autores: 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

Path analysis under multicollinearity in soybean
Provedor de dados: 52
Autores: Bizeti,Henrique Stoco; Carvalho,Claudio Guilherme Portela de; Souza,José Roberto Pinto de; Destro,Deonisio.
This study aimed to establish the phenotypic correlations among several soybean traits with grain yield in direct and indirect effects using path analysis, and to compare alternative methods for minimizing the adverse effects of multicollinearity in estimating path coefficients. The experiment was conducted in greenhouse in a randomized complete block design with four replications. Nine soybean genotypes belonging to three seed size categories were used. The correlation studies and the path analysis showed that the seed size was not important for increased yield. The number of nodes and plant height at maturity showed significant correlation with grain yield. Using the least square methodology, the results obtained by path analysis under multicollinearity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic breeding; Glycine max; Grain yield; Seed size; Root and canopy traits.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500001

Genetics of coffee quality
Provedor de dados: 61
Autores: 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

Production, carbon and nitrogen in stover fractions of corn ( Zea mays L.) in response to cultivar development
Provedor de dados: 64
Autores: 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

Evaluation of maize top crosses under two nitrogen levels
Provedor de dados: 64
Autores: 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