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| Registros recuperados: 38 | |
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| GUIMARÃES, L. A.; DUSI, D. M. de A.; MASIERO, S.; RESENTINI, F.; GOMES, A. C. M. M.; SILVEIRA, E. D.; FLORENTINO, L. H.; RODRIGUES, J. C. M.; COLOMBO, L.; CARNEIRO, V. T. de C.. |
| Tipo: Separatas |
Palavras-chave: MADS-box; Monocot; Reprodução vegetal; Brachiaria; Arabidopsis; Apomixis. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/974856 |
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| MONTEIRO, L. C.; VERZIGNASSI, J. R.; BARRIOS, S. C. L.; VALLE, C. B. do; FERNANDES, C. D.; BENTEO, G. L.; LIBÓRIO, C. B.. |
| Brachiaria decumbens has great importance in the national beef cattle scenario due to its high forage yield potential and high adaptability to acid soils and low fertility. In order to obtain new cultivars, intraspecific hybrids, previously selected by the Brachiaria breeding program, were evaluated in 2013 and 2014 for phenological characteristics and seed production potential through their production components, aiming to obtain cultivars with satisfactory production agronomic characteristics and forage yield, resistant to ?cigarrinhas-das-pastagens? (Tomaspia sp.) and good seed production. Estimates of phenotypic correlation and analysis of variance were performed using the SAS 9.3 software. From the results obtained in both consecutive years, it was... |
| Tipo: Artigo de periódico |
Palavras-chave: Genotypes; Forage improvement; Melhoramento de forrageira.; Fenologia; Genótipo; Apomixia.; Phenology; Apomixis. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1087913 |
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| VALLE, C. B. do; EUCLIDES, V. P. B.; MONTAGNER, D. B.; VALERIO, J. R.; MENDES-BONATTO, A. B.; VERZIGNASSI, J. R.; TORRES, F. Z. V.; MACEDO, M. C. M.; FERNANDES, C. D.; BARRIOS, S. C. L.; DIAS FILHO, M. B.; MACHADO, L. A. Z.; ZIMMER, A. H.. |
| O híbrido BRS RB331 Ipyporã é resultado de um cruzamento entre B. ruziziensis e B. brizantha realizado em 1992, na Embrapa Gado de Corte e liberado pela Embrapa em 2017 em parceria com a UNIPASTO, após 13 anos intermitentes de avaliações. É uma planta de porte baixo, prostrado, com colmos delgados de bainhas muito pilosas e folhas pilosas em ambas as faces. As espiguetas são uniseriadas e com pouca ou nenhuma pilosidade. A BRS Ipyporã entra no mercado para suprir a demanda por uma cultivar de Brachiaria de boa produtividade e manejo relativamente fácil, como a cv. Marandu, porém com elevado grau de resistência à cigarrinha da cana do gênero Mahanarva, além de apresentar resistência às cigarrinhas típicas de pastagem dos gêneros Deois e Notozulia,... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Desempenho animal; Híbrido interespecífico.; Brachiaria brizantha; Cigarrinha; Valor nutritivo; Semente; Apomixia.; Urochloa brizantha; Cercopidae; Apomixis; Animal performance; Interspecific hybridization; Seeds; Nutritive value. |
| Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1069732 |
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| OLIVEIRA, F. A. de; VIGNA, B. B. Z.; SILVA, C. C. da; FAVERO, A. P.; MATTA, F. de P.; AZEVEDO, A. L. S.; SOUZA, A. P. de. |
| RNA sequencing (RNA-seq) is the most effective method for simultaneously predicting new transcripts and identifying differentially expressed genes among distinct tissues, genotypes, abiotic conditions and developmental stages [1]. Conversely, considering the large amount of data generated from RNA-seq, new approaches that efficiently extract meaningful associations from highly multivariate datasets are needed [2]. Transcriptome coexpression studies can show how complex phenotypes depend on the activity of coordinated batteries of genes [3]. Therefore, the construction of coexpression networks based on gene expression data using correlation metrics provides valuable information regarding alterations in biological systems in response to differential gene... |
| Tipo: Artigo de periódico |
Palavras-chave: Differential expression; Gene coexpression network; RNA sequencing; Apomixis; Paspalum. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121557 |
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| Dahmer,Nair; Schifino-Wittmann,Maria Teresa; Dall'Agnol,Miguel; Castro,Biane de. |
| Several species of the genus Paspalum L. are important forages, due their to quality, productivity and tolerance to environmental stresses. Chromosome numbers, meiotic configurations and pollen fertility were evaluated in a collection of 85 accessions of Paspalum notatum Flügge and in seven accessions of Pensacola (P. notatum var saurae). All P. notatum accessions were tetraploid, with 2n = 4x = 40, except one diploid accession, considered as an escape of Pensacola. All Pensacola plants had 2n = 2x = 20. Meiotic configurations at diakinesis and metaphase I varied among tetraploid accessions, from plants with only bivalents to plants with high frequency of quadrivalents. Pollen fertility varied from 82.5 to 95.9% among diploid accessions and from 72.4 to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apomixis; Chromosome numbers; Meiotic configurations; Plant breeding; Pollen fertility. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400009 |
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| VALLE, C. B. do; EUCLIDES, V. P. B.; VALÉRIO, J. R.; MACEDO, M. C. M.; CHIARI, L.; PAGLIARINI, M. S.; JANK, L.; RESENDE, R. M. S.; DIAS-FILHO, M. B.. |
| The evaluation progress leading to cultivar development of a forage grass is a long-term investment, which requires a multidisciplinary team. |
| Tipo: Separatas |
Palavras-chave: Braquiária; Piatã; Brasil; Feed crops; Feed grasses.; Apomixia; Brachiaria Brizantha; Gramínea Forrageira; Melhoramento Genético Vegetal; Planta Forrageira; Pastagem; Reprodução.; Apomixis; Plant breeding; Pastures; Reproduction; Brazil.. |
| Ano: 2008 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/907359 |
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| SILVEIRA, E. D.; GUIMARÃES, L. A.; DUSI, D. M. de A.; SILVA, F. R. da; MARTINS, N. F.; COSTA, M. M. do C.; ALVES-FERREIRA, M.; CARNEIRO, V. T. de C.. |
| Abstract - In apomixis, asexual mode of plant reproduction through seeds, an unreduced megagametophyte is formed due to circumvented or altered meiosis. The embryo develops autonomously from the unreduced egg cell, independently of fertilization. Brachiaria is a genus of tropical forage grasses that reproduces sexually or by apomixis. A limited number of studies have reported the sequencing of apomixis-related genes and a few Brachiaria sequences have been deposited at genebank databases. This work shows sequencing and expression analyses of expressed sequence-tags (ESTs) of Brachiaria genus and points to transcripts from ovaries with preferential expression at megasporogenesis in apomictic plants. From the 11 differentially expressed sequences from... |
| Tipo: Separatas |
Palavras-chave: Forage grass; Apomixis; Plant reproduction. |
| Ano: 2012 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/938024 |
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| Graminho,Larissa Arnhold; Dall’Agnol,Miguel; Pötter,Luciana; Lopes,Rodrigo Ramos; Simioni,Carine; Weiler,Roberto Luís. |
| ABSTRACT: The objective of this study was to evaluate, through meta-analysis, the forage characteristics of various species of the genus Paspalum and to use them to select the best ecotypes that can be used in artificial hybridization as parents and hybrids for pasture production and natural pasture recovery systems. Data were obtained from studies conducted by the Department of Forage Plants and Agrometeorology of the Universidade Federal do Rio Grande do Sul. Database comprised tests conducted with ecotypes and/or hybrids of Paspalum spp. in plots for evaluating total dry mass production, leaf dry mass production, and stem dry mass production by means of cuts. Total dry mass production, which included leaves and stems, differed between the ecotypes and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apomixis; Hybridization; Plant breeding; Natural pasture; Variability. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700651 |
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| Motta,Eder Alexandre Minski da; Dall'Agnol,Miguel; Nascimento,Felipe Link; Pereira,Emerson André; Machado,Juliana Medianeira; Barbosa,Marlon Risso; Simioni,Carine; Ferreira,Priscila Becker. |
| ABSTRACT: The goal of this study was to assess the variability of Paspalum plicatulum x P. guenoarum interspecific hybrids in terms of agronomic performance and their tolerance to cold conditions, as well as to estimate the correlation of different phenotypic characters associated with forage production. Twenty hybrids plants were used, besides one access P. guenoarum , one of P. plicatulum and the cultivar 'Pensacola' ( P. notatum ). Assessments were performed on individual plants, in a completely randomized design with five repetitions. Paspalum genotypes presented variability in total dry matter, leaf dry mass, leaf: stem ratio, and tolerance to cold. We suggest selection of the hybrids 08Q01 and 08Q44 for new stages within a forage improvement... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apomixis; Native grasses; Hybridization. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601025 |
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| Márcia de Araújo,Luzia; Valentin-Silva,Adriano; Fernandes,Geraldo W; Vieira,Milene F. |
| Studies on the reproductive biology of Dorstenia species are scarce. We analyzed the sexuality, floral biology, and diaspore dispersal of Dorstenia arifolia and D. bonijesu, including their breeding systems and pollinators, in natural populations from Minas Gerais state, southeastern Brazil. We report here, for the first time, the occurrence of both unisexual (male) and bisexual coenanthia on the same individuals of Dorstenia arifolia, while only bisexual coenanthia were observed in D. bonijesu. In both species all coenanthia were long-lived and bisexual coenanthia were protogynous. We observed the occurrence of self-compatibility and myophily in Dorstenia arifolia, a species which was pollinated by small Lauxaniidae flies. Those insects not only used... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apomixis; Hydrochory; Lauxaniidae; Myophily; Oviposition site. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932017000100005 |
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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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| Registros recuperados: 38 | |
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