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| Registros recuperados: 27 | |
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| CAIXETA, E. T.; RESENDE, M. D. V. de; ALKIMIM, E. R.; SOUSA, T. V.; OLIVEIRA, A. C. B. de; PEREIRA, A. A.; ALVES, R. S.. |
| Neste documento, foram demonstrados os usos da seleção assistida por marcadores moleculares e da seleção genômica nas espécies Coffea arabica e Coffea canephora. O uso dessas técnicas seletivas possibilitou o aumento na eficiência nos programas de melhoramento dessas espécies. Além disso, evidencia a importância da utilização de diferentes metodologias de seleção, sendo explorado os benefícios de cada técnica seletiva, tornando os programas de melhoramento mais eficientes e competitivos. |
| Tipo: Livros |
Palavras-chave: Melhoramento Genético Vegetal; Seleção Genótipa; Variedade; Café; Coffea Arábica; Coffea Canephora; Hemileia Vastatrix; Marcador Molecular. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1145724 |
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| SUSSEL, A. A. B.; SILVA NETO, S. P. da; MOREIRA, C. T.; ALVES, R. S.; ALMEIDA, N. J.. |
| A expansão do cultivo da soja para áreas irrigadas no Cerrado com semeadura ao final do período da janela de plantio favorece a ocorrência de epidemias de ferrugem asiática devido à alta quantidade de inoculo presente no ar produzido pelas áreas onde o cultivo teve inicio antecipado. As lesões formadas nas folhas podem ser classificadas como do tipo castanho clara com muitos soros urediniais e abundante esporulação (TAN) ou castanho avermelhada com poucos soros urediniais e com pouca ou nenhuma esporulação (RB ? Reddish Brown). Lesões do tipo RB são típicas de materiais com genes dominantes de resistência ou de efeito principal a essa doença. Este tipo de lesão pode ser descrito como uma reação de hipersensibilidade. Dessa forma, objetivou-se neste... |
| Tipo: Parte de livro |
Palavras-chave: Ferrugem asiática.; Cerrado; Phakopsora Pachyrhizi; Soja.. |
| Ano: 2012 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/929367 |
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| ALKIMIM, E. R.; CAIXETA, E. T.; SOUSA, T. V.; GOIS, I. B.; SILVA, F. L. da; SAKIYAMA, N. S.; ZAMBOLIM, L.; ALVES, R. S.; RESENDE, M. D. V. de. |
| Breeding programs of the species Coffea canephora rely heavily on the significant genetic variability between and within its two varietal groups (conilon and robusta). The use of hybrid families and individuals has been less common. The objectives of this study were to evaluate parents and families from the populations of conilon, robusta, and its hybrids and to define the best breeding and selection strategies for productivity and disease resistance traits. As such, 71 conilon clones, 56 robusta clones, and 20 hybrid families were evaluated over several years for the following traits: vegetative vigor, incidence of rust and cercosporiosis, fruit ripening time, fruit size, plant height, canopy diameter, and yield per plant. Components of variance and... |
| Tipo: Artigo de periódico |
Palavras-chave: Melhoramento Genético Vegetal; Café Robusta; Plant breeding; Coffea. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139243 |
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| SABOURIN, E.; CARON, P.; OLIVEIRA, J. S.; ALVES, R. S.. |
| Após uma fase de investimento da pesquisa em escala local, o desafio proposto, a partir de 1991, é experimentar métodos de apoio ao planejamento municipal (Caron et al., 1996). O município é a menor entidade político-administrativa brasileira dotada de poderes executivos e legislativos. No Nordeste semi-árido, freqüentemente, ele tem um tamanho significativo, vários milhares de quilômetros quadrados por conta da fraca densidade demográfica. Desde 1990, a equipe do projeto está engajada em uma intervenção de pesquisa-ação no Município de Juazeiro, no Estado da Bahia. Este capítulo apresenta as bases e os princípios dessa intervenção. A ênfase é dada à experiência de uma metodologia de zoneamente, sob a ótica dos atores, que visa produzir informação... |
| Tipo: Parte de livro |
Palavras-chave: Zoneamento agrícola municipal; Unidade espacial; Bahia; Juazeiro; Agricultura Familiar; Family farms. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/153311 |
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| SUSSEL, A. A. B.; SILVA NETO, S. P. da; MOREIRA, C. T.; ALVES, R. S.; ALMEIDA, N. J.. |
| A ferrugem asiática está disseminada em todas regiões produtoras de soja do Brasil. Os sintomas iniciais da doença são pequenas pústulas foliares, de cor castanha a marromescura, podem ser classificadas como do tipo castanho clara com muitos soros urediniais e abundante esporulação (TAN) ou castanho avermelhada com poucos soros urediniais e com pouca ou nenhuma esporulação (RB).Observou-se diferença estatística entre as médias de severidade e de desfolha causadas pela ferrugem asiática, nos diferentes tratamentos com fungicidas nos três estratos avaliados. Tratamentos com apenas uma pulverização não apresentaram diferenças significativas em relação aos tratamentos com três pulverizações. Houve diferença estatística entre as médias de número de esporos... |
| Tipo: Parte de livro |
Palavras-chave: Ferrugem asiática.; Soja.. |
| Ano: 2012 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/929377 |
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| CHAVES, S. F. S.; EVANGELISTA, J. S. P. C.; TRINDADE, R. dos S.; DIAS, L. A. S.; GUIMARAES, P. E. de O.; GUIMARAES, L. J. M.; ALVES, R. S.; BHERING, L. L.; DIAS, K. O. G.. |
| Genotype-by-environment interaction (GEI) is a major concern in tropical maize breeding. Here, we used factor analytic mixed models (FAMM) to study GEI in a tropical maize dataset. Our goal was to select high-performance and stable hybrids using factor analytic selection tools (FAST) derived from FAMM outputs. Because the dataset comprised two different planting seasons, we also investigated differences in the genetic gains between seasonal and general selection (i.e., for both seasons simultaneously). The trials were installed in a lattice design with 36 hybrids containing two replicates and blocks with six plants each. We evaluated 53 hybrids and seven checks in 48 environments, represented by a combination of locations, years and seasons. We fitted the... |
| Tipo: Artigo de periódico |
Palavras-chave: Interação genótipo-ambiente; Milho; Hibrido; Zea Mays; Genética Vegetal. |
| Ano: 2023 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1152618 |
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| SILVA, J. O. da C. e; BRUCKNER, C. H.; CARNEIRO, P. C. S.; RESENDE, M. D. V. de; ALVES, R. S.; MATIAS, R. G. P.. |
| Estimates of genetic parameters and repeatability coefficients in peach breeding are scarce. In view of this, the present study was carried out to estimate genetic parameters for plant and fruit traits and repeatability coefficients for fruit traits in S2 peach genotypes grown in a subtropical environment. A total of 434 individuals from 55 full-sib families of five populations were used in the study. The following plant traits were evaluated: trunk diameter at 10 cm above soil level (TD10), trunk diameter at 130 cm above soil level (TD130), plant height (PH), rate of budding on mixed branches (RB), rate of blind nodes on mixed branches (RBN), fruit number (FN) and harvest time (HT). In the fruit, the following traits were measured: weight (FW), diameter... |
| Tipo: Artigo de periódico |
Palavras-chave: Melhoramento Genético Vegetal; Pêssego; Prunus persica var. nucipersica; Fruits; Selection methods; Peaches. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129617 |
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| SILVA, J. O. da C. e; BRUCKNER, C. H.; CARNEIRO, P. C. S.; RESENDE, M. D. V. de; ALVES, R. S.; SILVA, D. F. P. da. |
| The growing of peach in mild winter regions is made viable through the use of genotypes that have low need for cold conditions, and this is one of the main aims of breeding for these regions. Thus, the aims of this study were to estimate genetic parameters, evaluate genetic variability, and select families adapted to mild winter regions in the S1 generation of peach through mixed model methodology (REML/BLUP). For that purpose, 22 populations, 84 families, and 2090 individuals were evaluated for the following traits: bud burst rate (BR), node density (ND), plant height (PH), and trunk diameter (TD). Genetic variability was found for all the traits. Individual heritability in the broad sense was of low and medium magnitudes. The PH trait had positive... |
| Tipo: Artigo de periódico |
Palavras-chave: Prunus Persica; Melhoramento Vegetal; Fruta; Pêssego; Fruit trees; Plant breeding; Peaches. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129623 |
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| SANCHÉZ, C. F. B.; ALVES, R. S.; GARCIA, A. d. P.; TEODORO, P. E.; PEIXOTO, L. A.; SILVA, L. A.; BHERING, L. L.; RESENDE, M. D. V. de. |
| The aim of this study was to evaluate repeated measures over the years to estimate repeatability coefficient and the number of the optimum measure to select superior genotypes in Annona muricata L. The fruit production was evaluated over 16 years in 71 genotypes without an experimental design. The estimation of variance components and the prediction of the permanent phenotypic value were performed using REML/BLUP proceedings. The coefficient of determination, accuracy, and selective efficiency increased when measures increased. The coefficient of determination of 80% was reached beyond 8 crop seasons with high accuracy and selective efficiency. Thus, the evaluation of 8 crop seasons can be suitable to select superior genotypes in the A. muricata L.... |
| Tipo: Artigo de periódico |
Palavras-chave: REML. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1085408 |
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| MIRANDA, T. L. R.; RESENDE, M. D. V. de; AZEVEDO, C. F.; NUNES, A. C. P.; TAKAHASHI, E. K.; SIMIQUELI, G. F.; SILVA, F. F. e; ALVES, R. S.. |
| The Fisher?s infinitesimal model is traditionally used in quantitative genetics and genomic selection, and it attributes most genetic variance to additive variance. Recently, the dominance maximization model was proposed and it prioritizes the dominance variance based on alternative parameterizations. In this model, the additive effects at the locus level are introduced into the model after the dominance variance is maximized. In this study, the new parameterizations of additive and dominance effects on quantitative genetics and genomic selection were evaluated and compared with the parameterizations traditionally applied using the genomic best linear unbiased prediction method. As the parametric relative magnitude of the additive and dominance effects... |
| Tipo: Artigo de periódico |
Palavras-chave: Melhoramento Genético Vegetal; Seleção Genética; Molecular models; Plant selection guides; Plant breeding. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139183 |
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| NUNES, A. C. P.; RESENDE, M. D. V. de; SANTOS, G. A. dos; ALVES, R. S.. |
| The present study aimed to evaluate the selection indices efficiency for Pilodyn penetration combined with growth traits in Eucalyptus clones. It was carried out experiments in a randomized block design, with single tree plots and 30 replications. Diameter at breast height (DBH), total height (TH), and Pilodyn penetration as an indicator of basic density (BD) were measured. The volume was estimated. Based on predicted genotypic values, three indices presented the highest accuracies: I8 (based on partial correlation), I7 (based on the concept of multivariate BLUP) and I3 (based on two variables as ratio, which uses a third heritability estimate associated to the ratio DBH/BD, besides the two heritabilities of DBH and BD). Thus, it is possible to optimize... |
| Tipo: Artigo de periódico |
Palavras-chave: Partial correlation; Path analysis; Selection criteria; Accuracy; Wood quality. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1082823 |
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| ALVES, R. S.; TEODORO, P. E.; FARIAS, F. C.; FARIAS, F. J. C.; CARVALHO, L. P. de; RODRIGUES, J. I. S.; BHERING, L. L.; RESENDE, M. D. V. de. |
| Cotton produces one of the most important textile fibers of the world and has great relevance in the world economy. It is an economically important crop in Brazil, which is the world?s fifth largest producer. However, studies evaluating the genotype x environment (G x E) interactions in cotton are scarce in this country. Therefore, the goal of this study was to evaluate the G x E interactions in two important traits in cotton (fiber yield and fiber length) using the method proposed by Eberhart and Russell (simple linear regression) and reaction norm models (random regression). Eight trials with sixteen upland cotton genotypes, conducted in a randomized block design, were used. It was possible to identify a genotype with wide adaptability and stability for... |
| Tipo: Artigo de periódico |
Palavras-chave: Genetic selection; Stability and adaptability; Mixed model methodology; Random regression; Gossypium hirsutum; Seleção genética; Natural selection. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083385 |
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| SIMEÃO, R. M.; RESENDE, M. D. V. de; ALVES, R. S.; PESSOA-FILHO, M.; AZEVEDO, A. L. S.; JONES, C. S.; PEREIRA, J. F.; MACHADO, J. C.. |
| The world population is expected to be larger and wealthier over the next few decades and will require more animal products, such as milk and beef. Tropical regions have great potential to meet this growing global demand, where pasturelands play a major role in supporting increased animal production. Better forage is required in consonance with improved sustainability as the planted area should not increase and larger areas cultivated with one or a few forage species should be avoided. Although, conventional tropical forage breeding has successfully released well-adapted and high-yielding cultivars over the last few decades, genetic gains from these programs have been low in view of the growing food demand worldwide. To guarantee their future impact on... |
| Tipo: Artigo de periódico |
Palavras-chave: Seleção assistida; Seleção genômica; Brachiaria; Apomixia; Poliploidia; Gramínea; Apomixis; Marker-assisted selection; Polyploidy. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133333 |
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| RESENDE, M. D. V. de; ALVES, R. S.. |
| This paper presents the state of the art of the statistical modelling as applied to plant breeding. Classes of inference, statistical models, estimation methods and model selection are emphasized in a practical way. Restricted Maximum Likelihood (REML), Hierarchical Maximum Likelihood (HIML) and Bayesian (BAYES) are highlighted. Distributions of data and effects, and dimension and structure of the models are considered for model selection and parameters estimation. Theory and practical examples referring to selection between models with different fixed effects factors are given using the Full Maximum Likelihood (FML). An analytical FML way of defining random or fixed effects is presented to avoid the subjective or conceptual usual definitions. Examples of... |
| Tipo: Artigo de periódico |
Palavras-chave: Método Estatístico; Melhoramento Genético Vegetal; Plant breeding; Statistical models. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129637 |
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| PEIXOTO, M. A.; EVANGELISTA, J. S. P. C.; ALVES, R. S.; FARIAS, F. J. C.; CARVALHO, L. P.; TEODORO, L. P. R.; TEODORO, P. E.; BHERING, L. L.. |
| In multi-environment trials (MET), large networks are assessed for results improvement. However, genotype by environment interaction plays an important role in the selection of the most adaptable and stable genotypes in MET framework. In this study, we tested different residual variances and measure the selection gain of cotton genotypes accounting for adaptability and stability, simultaneously. Twelve genotypes of cotton were bred in 10 environments, and fiber length (FL), fiber strength (FS), micronaire (MIC), and fiber yield (FY) were determined. Model selection for different residual variance structures (homogeneous and heterogeneous) was tested using the Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC). The variance... |
| Tipo: Artigo de periódico |
Palavras-chave: Algodão. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139988 |
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| VOLPATO, L.; ALVES, R. S.; TEODORO, P. E.; RESENDE, M. D. V. de; NASCIMENTO, M.; NASCIMENTO, A. C. C.; LUDKE, W. H.; SILVA, F. L. da; BORÉM, A.. |
| At present, single-trait best linear unbiased prediction (BLUP) is the standard method for genetic selection in soybean. However, when genetic selection is performed based on two or more genetically correlated traits and these are analyzed individually, selection bias may arise. Under these conditions, considering the correlation structure between the evaluated traits may provide more-accurate genetic estimates for the evaluated parameters, even under environmental influences. The present study was thus developed to examine the efficiency and applicability of multi-trait multi-environment (MTME) models by the residual maximum likelihood (REML/BLUP) and Bayesian approaches in the genetic selection of segregating soybean progeny. The study involved data... |
| Tipo: Artigo de periódico |
Palavras-chave: Bayesian-inference; Genomic selection; Breeding values; Seed protein; Mixed models; Inferência Bayesian; Modelo misto; Seleção genômica; Soja; Soybeans; Agronomic traits; Prediction. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110400 |
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| FERREIRA, F. M.; EVANGELISTA, J. S. P. C.; CHAVES, S. F. da S.; ALVES, R. S.; SILVA, D. B.; MALIKOUSKI, R. G.; RESENDE, M. D. V. de; BHERING, L. L.; SANTOS, G. A.. |
| Forest plantations are strong allies in preserving natural resources, providing social and economic benefits. The plantations carried out in the coming years will be vital to meet the growing demand for forest products. To ensure the continuity of genetic progress and the good results achieved with the improvement of forest species, statistical methods that accurately selects superior genotypes are desirable. Multi-trait multi-environment trials are preferred over single-trait single-environment trials, since they can exploit the covariance between traits and environments, increasing the analysis?s prediction power. The Bayesian multi-trait multi-environments approach (BMTME) combines the cited advantages with the parsimony of Bayesian statistics promoting... |
| Tipo: Artigo de periódico |
Palavras-chave: Quantitative genetics; Multivariate analysis; Bayesian theory; Eucalyptus; Forest trees; Tree breeding. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1150839 |
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| ALVES, R. S.; RESENDE, M. D. V. de; ROCHA, J. R. do A. S. de C.; PEIXOTO, M. A.; TEODORO, P. E.; SILVA, F. F. e; BHERING, L. L.; SANTOS, G. A. dos. |
| An accurate, efficient and informative statistical method for analyses of genotype × environment (G × E) interactions is a key requirement for progress in any breeding program. Thus, the objective of this study was to quantify individual variation in reaction norms using random regression models fitted through Legendre polynomials in eucalyptus (Eucalyptus spp.) breeding. To this end, a data set with 215 eucalyptus clones of different species and hybrids evaluated in four environments for diameter at breast height (DBH) and Pilodyn penetration (PP) was used. Variance components were estimated by restricted maximum likelihood, and genetic values were predicted by best linear unbiased prediction. The best-fitted model for DBH and PP was indicated by the... |
| Tipo: Artigo de periódico |
Palavras-chave: Método Estatístico; Melhoramento Genético Vegetal; Interação Genética; Eucalipto; Statistical models; Genotype-environment interaction; Forest trees; Plant breeding; Eucalyptus. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129653 |
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| Registros recuperados: 27 | |
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