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| Registros recuperados: 18 | |
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| MATIAS, F. I.; VIDOTTI, M. S.; MEIRELES, K. G. X.; BARRIOS, S. C. L.; VALLE, C. B. do; CARLEY, C. A. S.; FRITSCHE-NETO, R.. |
| The breeding process in tropical segmental allopolyploid forage Urochloa is challenging due to the complex genetic control of the traits. Knowledge about genes associated with forage traits, expressed in the different cutting seasons, are extremely useful to support breeding programs and development of new cultivars. Thus, the aims of our study were (i) to identify genomic regions related to forage traits through genomewide association studies (GWAS), and (ii) to verify the influence of allele dosage on these results. A panel of 272 genotypes of Urochloa spp. [U. brizantha (Hoscht. ex A. Rich.) R. Webster ´ U. ruziziensis (Hoscht. ex A. Rich.) R. Webster] was evaluated in both the wet and dry seasons. The GWAS analyses were performed with 26,535 single... |
| Tipo: Artigo de periódico |
Palavras-chave: Tropical regions; Urochloa; Forage; Animal proteins; Cattle feeding; Animal performance; Pastures. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1117774 |
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| FRITSCHE-NETO, R.; SOUZA, T. L. P. O. de; PEREIRA, H. S.; FARIA, L. C. de; MELO, L. C.; NOVAES, E.; BRUM, I. J. B.; JANNINK, J-L.. |
| Despite important biotic stresses to common bean, Anthracnose (ANT) and Angular Leaf Spot (ALS) can cause losses of up to 80 % and occur in more than 60 countries around the world. Genetic resistance is the most sustainable strategy to manage these diseases. Thus, we aimed to (1) identify new SNP markers associated with ALS and ANT resistance loci in elite common bean lines, and (2) provide a functional characterization of the DNA sequences containing the identified SNP markers. We evaluated 60 inbred lines, under field conditions, which represent the elite germplasm developed by the Embrapa common bean breeding program across 22 years, in terms of severity of the ALS and ANT. The lines were genotyped with 5,398 SNPs. Then, a Mixed Linear Model was run to... |
| Tipo: Artigo de periódico |
Palavras-chave: Feijão; Phaseolus Vulgaris; Antracnose; Resistência; Mancha Angular; Anthracnose; Beans; Colletotrichum lindemuthianum virus; Pseudocercospora; Disease resistance; Marker-assisted selection. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1111232 |
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| MATIAS, F. I.; BARRIOS, S. C. L.; BEARARI, L. M.; MEIRELES, K. G. X.; MATEUS, R. G.; AMARAL, P. N. C. do; ALVES, G. F.; VALLE, C. B. do; FRITSCHE-NETO, R.. |
| A tropical forage breeding program contains several peculiarities, especially when it involves polyploid species and facultative apomixis. Urochloa spp. are excellent perennial forages, and the identification of superior genotypes depends on the selection of many characteristics under complex genetic control, with high cost and time-consuming evaluation. Therefore, the use of tools such as multivariate analysis and diallel analyses could contribute to improving the efficiency of breeding programs. Thus, the objectives were to estimate (i) the contribution of additive and nonadditive effects on agronomical and nutritional traits in a population of interspecific hybrids of Urochloa spp., originated from a partial diallel between five apomictic and four... |
| Tipo: Artigo de periódico |
Palavras-chave: Forrageira Tropical; Apomixia; Gramínea Perene; Controle Genético; Hibrido; Cruzamento Animal; Livestock; Grasslands; Breeding; Urochloa; Perennials; Polyploidy; Hybrids. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1106550 |
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| MATIAS, F. I.; MEIRELES, K. G. X.; NAGAMATSU, S. T.; BARRIOS, S. C. L.; VALE, C. B. do; CARAZZOLLE, M. F.; FRITSCHE-NETO, R.; ENDELMAN, J. B.. |
| Although genotyping-by-sequencing (GBS) is a well-established marker technology in diploids, the development of best practices for tetraploid species is a topic of current research. We determined the theoretical relationship between read depth and the phred-scaled probability of genotype misclassification conditioned on the true genotype, which we call expected genotype quality (EGQ). If the GBS method has 0.5% allelic error, then 17 reads are needed to classify simplex tetraploids as heterozygous with 95% accuracy (EGQ = 13) vs. 61 reads to determine allele dosage. We developed an R script to convert tetraploid GBS data in variant call format (VCF) into diploidized genotype calls and applied it to 267 interspecific hybrids of the tetraploid forage grass... |
| Tipo: Artigo de periódico |
Palavras-chave: Although genotyping-by-sequencing; Marker technology; Genotype; Hybrids; Urochloa. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1117777 |
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| CROSSA, J.; MONTESINOS-LÓPEZ, O. A.; PÉREZ-RODRÍGUEZ, P.; COSTA-NETO, G.; FRITSCHE-NETO, R.; ORTIZ, R.; MARTINI, J. W. R.; LILLEMO, M.; MONTESINOS-LÓPEZ, A.; JARQUIN, D.; BRESEGHELLO, F.; CUEVAS, J.; RINCENT, R.. |
| Genomic-enabled prediction models are of paramount importance for the successful implementation of genomic selection (GS) based on breeding values. As opposed to animal breeding, plant breeding includes extensive multienvironment and multiyear field trial data. Hence, genomic-enabled prediction models should include genotype × environment (G × E) interaction, which most of the time increases the prediction performance when the response of lines are different from environment to environment. In this chapter, we describe a historical timeline since 2012 related to advances of the GS models that take into account G × E interaction. We describe theoretical and practical aspects of those GS models, including the gains in prediction performance when including G... |
| Tipo: Parte de livro |
Palavras-chave: Genomic selection; Genome-enabled prediction; Models with G x E interaction; Melhoramento Genético Vegetal; Genótipo; Interação Genética; Genome; Genomics; Plant breeding; Genotype-environment interaction. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1143533 |
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| SANTOS, A.; AMARAL JÚNIOR, A. T. do; FRITSCHE-NETO, R.; KAMPHORST, S. H.; FERREIRA, F. R.; AMARAL, J. F. T. do; VIVAS, J. M. S.; SANTOS, P. H. A. D.; LIMA V. J. de; KHAN, S.; SCHMITT, K. F. M.; LEITE, J. T.; SANTOS JUNIOR, D. R. dos; BISPO, R. B.; SANTOS, T. de O.; OLIVEIRA, U. A. de; GUIMARAES, L. J. M.; RODRIGUEZ, O.. |
| The objective of this study was to evaluate the effects of additive and non-additive genes on the efficiency of nitrogen (N) use and N responsiveness in inbred popcorn lines. The parents, hybrids and reciprocal crosses were evaluated in a 10x10 triple lattice design at two sites and two levels of N availability. To establish different N levels in the two experiments, fertilization was carried out at sowing, according to soil analysis reports. However, for the experiments with ideal nitrogen availability, N was sidedressed according to the crop requirement, whereas for the N-poor experiments sidedressing consisted of 30% of that applied in the N-rich environment. Two indices were evaluated, the Harmonic Mean of the Relative Performance (HMRP) and Agronomic... |
| Tipo: Artigo de periódico |
Palavras-chave: Gene; Nitrogênio; Milho Pipoca; Linhagem. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113056 |
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| FRITSCHE-NETO, R.; MIRANDA, G. V.; VALE, J. C. do; BERMUDEZ, F. P.; LANES, É. C. M.; RESENDE, M. D. V. de; SEDIYAMA, C. S.. |
| O objetivo deste trabalho foi verificar a eficácia do método da seleção genomica ampla (GWS) no melhoramentode milho para os componentes da eficiência no uso de fósforo (EUP). Para isto, foram avaliadas 41 combinações híbridas de milho, em alta e baixa disponibilidade de P, em casa de vegetação pertencente ao Departamento de Fitotecnia da Universidade Federal de Viçosa, em outubro de 2010. As plantas foram coletadas no estádio V6. Foram estimados os dois componentes da EUP, que são as eficiências de absorção e de utilização de N. Os dados obtidos foram submetidos a análises estatísticas via metodologia REML/BLUP. Na genotipagem da população de estimação, foram utilizados 80 marcadores microssatélites (SSR). A predição dos valores genéticos genômicos dos... |
| Tipo: Parte de livro |
Palavras-chave: Seleção genomica ampla; Melhoramento genético.; Fósforo; Milho.. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/912993 |
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| LIMA, R. O. de; FRITSCHE-NETO, R.; VALE, J. C. do; BERMUDEZ, F. P.; LANES, É. C. M.; RESENDE, M. D. V. de; SEDYAMA, C. S.; MIRANDA, G. V.. |
| O objetivo deste trabalho foi verificar a eficácia do método da seleção genômica ampla (GWS) no melhoramento demilho para os componentes da eficiência no uso de nitrogênio (EUN). Para isto, foram avaliadas 41 combinações híbridas de milho, em alta e baixa disponibilidade de N, em casa de vegetação pertencente ao Departamento de Fitotecnia da Universidade Federal de Viçosa, em outubro de 2010. As plantas foram coletadasno estádio V6. Foram estimados os dois componentes da EUN, que são as eficiências na absorção e na utilização de N. Os dados obtidos foram submetidos a análises estatísticas via metodologia REML/BLUP. Na genotipagem da população de estimação, foram utilizados 80 marcadores microssatélites (SSR). A predição dos valores genéticos genômicos dos... |
| Tipo: Parte de livro |
Palavras-chave: Melhoramento genético; Seleção genômica ampla.; Milho; Nitrogênio.. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/912998 |
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| Registros recuperados: 18 | |
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