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| Registros recuperados: 23 | |
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| AZEVEDO, C. F.; FERRÃO, L. F. V.; BENEVENUTO, J.; RESENDE, M. D. V. de; NASCIMENTO, M.; NASCIMENTO, A. C. C.; MUNOZ, P. R.. |
| An approach for handling visual scores with potential errors and subjectivity in scores was evaluated in simulated and blueberry recurrent selection breeding schemes to assist breeders in their decision-making. Most genomic prediction methods are based on assumptions of normality due to their simplicity and ease of implementation. However, in plant and animal breeding, continuous traits are often visually scored as categorical traits and analyzed as a Gaussian variable, thus violating the normality assumption, which could affect the prediction of breeding values and the estimation of genetic parameters. In this study, we examined the main challenges of visual scores for genomic prediction and genetic parameter estimation using mixed models, Bayesian, and... |
| Tipo: Artigo de periódico |
Palavras-chave: Plant breeding; Animal breeding; Bayesian theory; Genome; Inheritance (genetics); Phenotype. |
| Ano: 2024 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1160409 |
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| FERRÃO, L. F. V.; CAIXETA, E. T.; SOUZA, F. de F.; ZAMBOLIM, E. M.; CRUZ, C. D.; ZABOLIM, L.; SAKIYAMA, N. S.. |
| The genetic variability characterization of the accessions of the germplasm collection, using molecular markers, is being applied as a complementary strategy to the traditional approaches to redefine the plant genetic resources. In this study, we compared the informativeness and efficiency of the molecular markers RAPD, AFLP and SSR in the analysis of 94 accessions of Coffea canephora germplasm held by the breeding program of the Brazilian Agricultural Research Corporation (Embrapa), Rondonia State, Brazil. For this, we considered the marker?s discriminatory power and level of polymorphism detected and also the genetic relationships and clustering (dendrogram) analysis. The RAPD marker yielded low-quality data and problems in the discrimination of some... |
| Tipo: Artigo de periódico |
Palavras-chave: AFLP; SSR; RAPD; Robusta coffee; Melhoramento genético; Coffee.; Café.; Genetic relationships.. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088232 |
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| ADUNOLA, P.; FERRÃO, M. A. G.; FERRÃO, R. G.; FONSECA, A. F. A. da; VOLPI, P. S.; COMÉRIO, M.; VERDIN FILHO, A. C.; MUNOZ, P. R.; FERRÃO, L. F. V.. |
| Coffee is one of the most important beverages and trade products in the world. Among the multiple research initiatives focused on coffee sustainability, plant breeding provides the best means to increase phenotypic performance and release cultivars that could meet market demands. Since coffee is well adapted to a diversity of tropical environments, an important question for those confronting the problem of evaluating phenotypic performance is the relevance of genotype-by-environment interaction. As a perennial crop with a long juvenile phase, coffee is subjected to significant temporal and spatial variations. Such facts not only hinder the selection of promising materials but also cause a majority of complaints among growers. In this study, we hypothesized... |
| Tipo: Artigo de periódico |
Palavras-chave: Coffea Canephora; Genomics; Genotype; Plant breeding; Prediction. |
| Ano: 2023 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1159395 |
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| FERRÃO, L. F. V.; CAIXETA, E. T.; CRUZ, C. D.; SOUZA, F. de F.; FERRAO, M. A. G.; ZAMBOLIM, Z.; SAKIYAMA, N. S.. |
| The use of molecular markers to study genetic diversity represents a breakthrough in this area, because of the increase in polymorphism levels and phenotypic neutrality. Codominant markers, such as microsatellites (SSR), are sensitive enough to distinguish the heterozygotes in genetic studies. Despite this advantage, there are some studies that ignore this feature and work with encoded data because of the simplicity of the evaluation, existence of polyploids and need for the combined analysis of different types of molecular markers. Thus, our study aims to investigate the consequences of these encodings on simulated and real data. In addition, we suggest an alternative analysis for genetic evaluations using different molecular markers. For the simulated... |
| Tipo: Artigo de periódico |
Palavras-chave: Codominant markers; Dominant markers Germplasm; SSR STRUCTURE; Café canéfora; Café conilon; Marcadores dominantes; Diversidade genética; Coffee; Café; Marcador molecular; Coffea Canephora. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125174 |
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| SOUZA, F. de F.; FERRÃO, L. F. V.; CAIXETA, E. T.; SAKIYAMA, N. S.; PEREIRA, A. A.; OLIVEIRA, A. C. B. de. |
| s primeiros registros históricos sobre o café foram encontrados em um manuscrito no Iêmen, em 575. As primeiras descrições científicas da planta foram apresentadas em 1591 e 1592, pelo botânico veneziano Prospero Alpino, em suas obras De Medicina Aegyptiorum e De Plantis Aegypitii Liber. No entanto, coube a Antoine Jussieu, em sua obra Histoire Du Café, publicada em 1716, a primeira classificação botânica do cafeeiro como Jasminum arabicum. Posteriormente, em 1737, Carl Von Linné (Lineu) reclassificou a espécie, dando-lhe o nome de Coffea arabica (MARTINS, 2008). A nomenclatura da tribo Coffeeae foi originalmente proposta por De Candolle, em 1807. Em sua classificação, esta tribo era bastante abrangente e incluía um grande número de gêneros, muitos dos... |
| Tipo: Parte de livro |
Palavras-chave: Caracter morfologico; Café; Marcador molecular; Coffea canephora; Espécie; Coffea liberica. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1041502 |
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| CARVALHO, H. F.; FERRÃO, L. F. V.; GALLI, G.; NONATO, J. V. A.; PADILHA, L.; MALUF, M. P.; RESENDE JR., M. F. R. de; FRITSCHE-NETO, R.; GUERREIRO-FILHO, O.. |
| Obtaining resistance cultivars for leaf miner and leaf rust are the main important strategy of Brazil?s national coffee breeding program. The narrow genetic basis, and founder effect consequences, lead to challenges in quantifying and detecting genetic diversity for these traits. Biotechnology tools allied with classical breeding strategies are powerful in detecting variability and deploying a precision selection. The selection based on the genetic merit of an individual obtained from thousands of single nucleotide polymorphism effects is known as genomic selection. The ordinal scale principally makes the resistance evaluation of the leaf rust and leaf miner of the score, categorizing the phenotypes following the discrete (ordinal) distribution. Hence,... |
| Tipo: Artigo de periódico |
Palavras-chave: Coffea arabica var. arabica; Leucoptera; Hemileia; Leaf rust; Genomics. |
| Ano: 2023 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1156023 |
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| SOUZA, F. de F.; CAIXETA, E. T.; ZAMBOLIM, E. M.; FERRÃO, L. F. V.; PENA, G. F.; ZAMBOLIM, L.; SAKIYAMA, N. S.. |
| O germoplasma de café canéfora (Coffea canephora), cultivado comercialmente ou conservado nas instituições brasileiras de pesquisa agropecuária, apresenta ampla variabilidade fenotípica, todavia são escassos os estudos que comparam acessos de diferentes coleções. Assim, esse trabalho objetivou avaliar a diversidade genética do germoplasma de C. canephora oriundo de distintas instituições de pesquisa, usando marcadores microssatélites. Foram avaliados 128 acessos de C. canephora, conservados na Estação Experimental da Embrapa Rondônia, em Ouro Preto do Oeste-RO, provenientes dos Bancos de Germoplasma (BAGs) do lAC (43 acessos), EPAMIG/UFV (11 acessos), INCAPER (39 acessos) e de coletas em áreas de cultivo no próprio Estado (35 acessos). Acessos de C.... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Melhoramento genético; Recursos genéticos; Diversidade genética; Café canéfora; Marcadores microssatélites.; Coffea Canephora; Germoplasma.. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/903149 |
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| FERRÃO, L. F. V.; SOUZA, F. de F.; CAIXETA, E. T.; ZAMBOLIM, E. M.; ZAMBOLIM, L.; SAKIYAMA, N. S.. |
| Em um programa de melhoramento, o estudo da diversidade genética em bancos de germoplasma (BAGs) é de primordial importância, principalmente no início, na definição de estratégias de ações. Com o advento dos marcadores baseados em DNA e da percepção das suas vantagens, tornou-se crucial o uso dessa técnica na complementação do acesso a diversidade genética, de forma a suplementar e refinar as classificações com base em marcadores morfológicos. Dessa forma, esse trabalho objetivou comparar o poder discriminatório e a eficiência dos marcadores moleculares RAPD, AFLP e SSR na estimativa das similaridades genéticas de 94 subamostras de Coffea canephora, mantidas no programa de melhoramento genético da Embrapa Rondônia. Para isso, os parâmetros níveis de... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Diversidade genética; Marcadores moleculares; Melhoramento genético.; DNA.. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/903998 |
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| SOUZA, F. de F.; CAIXETA, E. T.; FERRÃO, L. F. V.; PENA, G. F.; SAKIYAMA, N. S.; ZAMBOLIM, E. M.; ZAMBOLIM, L.; CRUZ, C. D.. |
| This work aimed to characterize accessions that represent the C. canephora germplasm conserved and cultivated in Brazil. A total of 130 accessions from germplasm banks of IAC (São Paulo), UFV (Minas Gerais) and also collected in plantations of the State of Espírito Santo and Rondônia were evaluated with a set of 20 new microsatellite primers. Multivariate methods were used to estimate the relationship among the accessions. High level of polymorphism and two major diversity clusters were identified. First cluster was composed by the accessions conserved in the IAC and UFV collections and the second was formed by accessions collected in areas under cultivation. Accessions from Espírito Santo and Rondônia were clear separated, composing two subclusters.... |
| Tipo: Separatas |
Palavras-chave: Diversidade genética; Marcadores microssatélites; Melhoramento genético; Coffee.; Café; Café Robusta.. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/972757 |
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| FERRÃO, L. F. V.; CAIXETA, E. T.; PENA, G.; ZAMBOLIM, E. M.; CRUZ, C. D.; ZAMBOLIM, L.; FERRAO, M. A. G.; SAKIYAMA, N. S.. |
| Microsatellite markers (SSR) have broad utility in genetic studies due to a high rate of polymor-phisms, a codominant nature and multiallelism. EST?SSRs are markers derived from the expressed sequences of a genome and represent transcribed genes. Despite the importance of the genus Coffea , only a small number of EST?SSR markers are currently available. Thus, this study was designed to mine and develop a new set of EST?SSR markers from the Brazilian Coffee Genome Project. We investigated 130,792 expressed sequence tags (ESTs), from which 24,031 DNA sequences with microsatellites were identified. After stability and amplification testing, 101 new EST?SSR markers were developed and analyzed in different coffee species. The average rate of transferability was... |
| Tipo: Artigo de periódico |
Palavras-chave: Brazilian Coffee Genome Project; Microsatellites.; Coffea Arábica.; Genetic markers; Coffea.. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1040767 |
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| VERDIN FILHO, A. C.; FERRÃO, R. G.; FERRAO, M. A. G.; SILVEIRA, J. S. M.; VOLPI, P. S.; FONSECA, A. F. A. da; LANI, J. A.; MARTINS, A. G.; FERRÃO, L. F. V.; SILVEIRA, T. B.. |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Manejo de lavoura.; Coffea Canephora.. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/903685 |
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| FERRÃO, L. F. V.; FERRÃO, R. G.; FERRAO, M. A. G.; FONSECA, A. F. A. da; GARCIA, A. A. F.. |
| Genomic selection (GS) has been studied in several crops to increase the rates of genetic gain and reduce the length of breeding cycles. Despite its relevance, there are only a modest number of reports applied to the genus Coffea. Effective implementation depends on the ability to consider genomic models, which correctly represent breeding scenario in which the species are inserted. Coffee experimentation, in general, is represented by evaluations in multiple locations and harvests to understand the interaction and predict the performance of untested genotypes. Therefore, the main objective of this study was to investigate GS models suitable for use in Coffea canephora. An expansion of traditional GBLUP was considered and genomic analysis was performed... |
| Tipo: Artigo de periódico |
Palavras-chave: Genotyping-by-sequencing; GBLUP; Multi-environment trials; Perennial crops; Marker-assisted selection. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1081803 |
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| FERRÃO, L. F. V.; FERRÃO, R. G.; FERRAO, M. A. G.; FONSECA, A. F. A. da; GARCIA, A. A. F.. |
| Genomic Selection (GS) has been studied in several crops with potential to increase the rates of genetic gain and reduce the length of breeding cycle. Despite the relevance, there is a modest number of reports applied to the genus Coffea. Nevertheless, the effective implementation depends on the ability to consider genomic models that represent with adequate reliability the breeding scenario in which the specie are inserted. Coffee experimentation, in general, is represented for evaluations in multiples sites and harvests (MET), in order to understand the interaction magnitude and predicting the performance of untested genotypes. Therefore, the main objective of this study was investigate GS models that accommodate MET modeling. A expansion of the... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Coffea Canephora.; Marker-assisted selection.. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1067269 |
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| FERRÃO, R. G.; FERRAO, M. A. G.; TÓFANO, J. L.; FONSECA, A. F. A. da; VOLPI, P. S.; VERDIN FILHO, A. C.; MENDONÇA, R. F. de; GUARÇONI, R. C.; FERRÃO, L. F. V.. |
| A cafeicultura de conilon do Espírito Santo é uma das atividades mais importante na geração de renda e emprego no Estado. O objetivo do trabalho foi estudar a produtividade de 95 clones elites de café conilon de maturação intermediária, selecionados no norte do Estado, nas condições edafoclimáticas do sul do Espírito Santo. O trabalho foi conduzido na Fazenda Experimental de Bananal do Norte/Incaper, Cachoeiro de Itapemirim, ES. O delineamento experimental foi blocos casualizados com quatro repetições. A parcela experimental foi de cinco plantas. O espaçamento foi de 3,0 x 1,2 metros. O trabalho foi implantado em maio de 2004 e os resultados apresentados são de três colheitas. Os clones mais promissores com em três colheitas foram os 710/97, 24/93, 124/89,... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Melhoramento genético.; Coffea Canephora; Variedade.. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/903675 |
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| FERRÃO, L. F. V.; FERRÃO, R. G.; FERRAO, M. A. G.; FONSECA, A. F. A. da; CARBONETTO, P.; SLEPHENS, M.; FRANCO, A. A.. |
| Genomic selection has been proposed as the standard method to predict breeding values in animal and plant breeding. Although some crops have benefited from this methodology, studies in Coffea are still emerging. To date, there have been no studies describing how well genomic prediction models work across populations and environments for different complex traits in coffee. Considering that predictive models are based on biological and statistical assumptions, it is expected that their performance vary depending on how well these assumptions align with the true genetic architecture of the phenotype. To investigate this, we used data from two recurrent selection populations of Coffea canephora, evaluated in two locations, and single nucleotide polymorphisms... |
| Tipo: Artigo de periódico |
Palavras-chave: Seleção Genética; Seleção Genótipa; Coffea Canephora. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1123866 |
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| FERRAO, M. A. G.; FONSECA, A. F. A. da; VOLPI, P. S.; SOUZA, L. C. de; COMÉRIO, M.; VERDIN FILHO, A. C.; RIVA-SOUZA, E. M.; MUNOZ, P. R.; FERRÃO, R. G.; FERRÃO, L. F. V.. |
| Coffee is a universal beverage that drives a multi-industry market on a global basis. Today, the sustainability of coffee production is threatened by accelerated climate changes. In this work, we propose the implementation of genomic-assisted breeding for climate-smart coffee in Coffea canephora. This species is adapted to higher temperatures and is more resilient to biotic and abiotic stresses. After evaluating two populations, over multiple harvests, and under severe drought weather condition, we dissected the genetic architecture of yield, disease resistance, and quality-related traits. By integrating genome-wide association studies and diallel analyses, our contribution is four-fold: (i) we identified a set of molecular markers with major effects... |
| Tipo: Artigo de periódico |
Palavras-chave: Plant breeding; Climate; Coffea canephora var. laurentii; Disease resistance. |
| Ano: 2023 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1152628 |
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| FERRÃO, L. F. V.; CAIXETA, E. T.; CRUZ, C. D.; SOUZA, F. de F.; FERRAO, M. A. G.; ZAMBOLIM, Z.; SAKIYAMA, N. S.. |
| The use of molecular markers to study genetic diversity represents a breakthrough in this area, because of the increase in polymorphism levels and phenotypic neutrality. Codominant markers, such as microsatellites (SSR), are sensitive enough to distinguish the heterozygotes in genetic studies. Despite this advantage, there are some studies that ignore this feature and work with encoded data because of the simplicity of the evaluation, existence of polyploids and need for the combined analysis of different types of molecular markers. Thus, our study aims to investigate the consequences of these encodings on simulated and real data. In addition, we suggest an alternative analysis for genetic evaluations using different molecular markers. For the simulated... |
| Tipo: Artigo de periódico |
Palavras-chave: Codominant markers; Dominant markers Germplasm; SSR STRUCTURE; Café canéfora; Café conilon; Marcadores dominantes; Diversidade genética; Coffee.; Café; Marcador molecular; Coffea Canephora.. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/981805 |
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| FERRÃO, L. F. V.; CAIXETA, E. T.; SOUZA, F. de F.; ZAMBOLIM, E. M.; CRUZ, C. D.; ZABOLIM, L.; SAKIYAMA, N. S.. |
| The genetic variability characterization of the accessions of the germplasm collection, using molecular markers, is being applied as a complementary strategy to the traditional approaches to redefine the plant genetic resources. In this study, we compared the informativeness and efficiency of the molecular markers RAPD, AFLP and SSR in the analysis of 94 accessions of Coffea canephora germplasm held by the breeding program of the Brazilian Agricultural Research Corporation (Embrapa), Rondonia State, Brazil. For this, we considered the marker?s discriminatory power and level of polymorphism detected and also the genetic relationships and clustering (dendrogram) analysis. The RAPD marker yielded low-quality data and problems in the discrimination of some... |
| Tipo: Artigo de periódico |
Palavras-chave: AFLP; SSR; RAPD; Robusta coffee; Melhoramento genético; Coffee; Café; Genetic relationships. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125172 |
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| Registros recuperados: 23 | |
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