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Registros recuperados : 123 | |
4. | | SAWAZAKI, E.; CASTRO, J. L.; GALLO, P. B.; IGLESIAS, C.; JUNQUEIRA, M. T. Avaliacao de genotipos de milho pipoca em plantio tardio e antecipado em dois locais do Estado de Sao Paulo. In: CONGRESSO NACIONAL DE MILHO E SORGO, 23., 2000, Uberlandia, MG. A inovacao tecnologica e a competitividade no contexto dos mercados globalizados: [anais]... Sete Lagoas: ABMS / Embrapa Milho e Sorgo / Universidade Federal de Uberlandia, 2000. CD-ROM. Biblioteca(s): Embrapa Hortaliças. |
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6. | | FELICIO, J. C.; CAMARGO, C. E. de O.; GALLO, P. B.; CAMARGO, M. B. P. de. Avaliação de genótipos de triticale em solos de várzea no Estado de São Paulo. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 30, n. 7, p. 939-946, jul. 1995. Título em inglês: Evaluation of triticale genotypes under low land conditions in the State of São Paulo, Brazil. Biblioteca(s): Embrapa Unidades Centrais. |
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10. | | MALUF, M. P.; AGUIAR, A. T. E.; GALLO, P. B.; FAZUOLI, L.; GUERREIRO FILHO, O. Caracterização agronômica e tecnológica de linhagens comerciais de café selecionadas pelo IAC. IN: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 1., 2000, Poços de Caldas. Resumos Expandidos. Brasília, DF: Embrapa Café/MINASPLAN, 2000. Biblioteca(s): Embrapa Café. |
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12. | | SOAVE, J.; AZZINI, L. E.; GALLO, P. B.; RICCI, M. T. T.; PRABHU, A. S. Ensaios cooperativos de avaliação de doenças de arroz de sequeiro no Estado de São Paulo em 1984/85 e 1985/86. In: REUNIÃO NACIONAL DE PESQUISA DE ARROZ, 3., 1987, Goiânia. Resumos. Brasilia, DF: EMBRAPA-DDT, 1987. p. 33. (EMBRAPA-CNPAF. Documentos, 19). Biblioteca(s): Embrapa Arroz e Feijão. |
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14. | | TANAKA, R. T.; MASCARENHAS, H. A. A.; REGITANO-D'ARCE, M. A. B.; GALLO, P. B. Concentração e produtividade de óleo e proteína de soja em função da adubação potássica e da calagem. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 30, n. 4, p. 463-469, abr. 1995. Título em inglês: Effect of liming and potassium on soybeans oil and protein concentration and yield. Biblioteca(s): Embrapa Unidades Centrais. |
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17. | | ROSSETO, C. J.; RIBEIRO, I. J. A.; GALLO, P. B.; CARVALHO, R. P. de L. Pragas da mangueira e seu controle Jaboticabal: FCAV - FUNEP, 1989. p.133-148 SIMAO, S. Situacao da mangicultura no mundo. In: SIMPOSIO SOBRE MANGICULTURA, 2., 1988, Jaboticabal. Anais... Jaboticabal: FCAV - FUNEP, 1989. Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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Registros recuperados : 123 | |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
01/02/2008 |
Data da última atualização: |
21/07/2011 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
GALLO, P. H; MICHELETTI, P. L.; BOLDRINI, K. R.; RISSO-PASCOLOTTO, C.; PAGLIARINI, M. S.; VALLE, C. B. do. |
Afiliação: |
Patrícia Helena Gallo, UEM; Pamela Lonardoni Micheletti, UEM; Kellen Regina Boldrini, UEM; Claudicéia Risso-Pascotto, UEM; Maria Suely Pagliarini, UEM; Cacilda Borges do Valle, CNPGC. |
Título: |
2n Gamete formation in the genus Brachiaria (Poaceae: Paniceae). |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Euphytica, Wageningen, Holanda, v. 154, n. 2, p. 255-260, 2007. |
Idioma: |
Inglês |
Notas: |
CNPGC. |
Conteúdo: |
Microsporogenesis of several Brachiaria species of the Brazilian collection at Embrapa Beef Cattle has been analyzed in detail. This paper reports abnormal cytokinesis in three accessions of three different species (Brachiaria humidicola, 2n = 4x = 36, Brachiaria decumbens, 2n = 4x = 36, and Brachiaria dura, 2n = 6x = 54). Chromosomes paired in bi-, tri-, and quadrivalents in these accessions, whereas chromosome segregation at meiosis I was characterized by exclusion of laggards as micronuclei. In a high number of meiocytes, the first sign of cytokinesis appeared only in metaphase II and did not divide the meiocyte into a dyad. Total absence of cytokinesis was also detected among meiocytes in the second division. Since in both cases the two metaphase plates were very close, they favored the rejoining of chromosome sets after anaphase II and formed a restitutional nucleus in telophase II. Second cytokinesis occurred after telophase II in most meiocytes. Monads, dyads, and triads with n or 2n nuclei were observed among meiotic products. The 2n gametes observed correspond to the first division restitution (FDR). The number of affected cells in each accession was variable, but the number of microspores with restitutional nucleus, including those scored in tetrads and the released ones, did not exceed 9%. Although polyploidy is common in the genus Brachiaria, its origin is still unclear. Current results suggest that 2n gametes may have contributed to the evolutionary history of the genus. MenosMicrosporogenesis of several Brachiaria species of the Brazilian collection at Embrapa Beef Cattle has been analyzed in detail. This paper reports abnormal cytokinesis in three accessions of three different species (Brachiaria humidicola, 2n = 4x = 36, Brachiaria decumbens, 2n = 4x = 36, and Brachiaria dura, 2n = 6x = 54). Chromosomes paired in bi-, tri-, and quadrivalents in these accessions, whereas chromosome segregation at meiosis I was characterized by exclusion of laggards as micronuclei. In a high number of meiocytes, the first sign of cytokinesis appeared only in metaphase II and did not divide the meiocyte into a dyad. Total absence of cytokinesis was also detected among meiocytes in the second division. Since in both cases the two metaphase plates were very close, they favored the rejoining of chromosome sets after anaphase II and formed a restitutional nucleus in telophase II. Second cytokinesis occurred after telophase II in most meiocytes. Monads, dyads, and triads with n or 2n nuclei were observed among meiotic products. The 2n gametes observed correspond to the first division restitution (FDR). The number of affected cells in each accession was variable, but the number of microspores with restitutional nucleus, including those scored in tetrads and the released ones, did not exceed 9%. Although polyploidy is common in the genus Brachiaria, its origin is still unclear. Current results suggest that 2n gametes may have contributed to the evolutionary history of t... Mostrar Tudo |
Palavras-Chave: |
Brachiaria dura; Braquiária; Brasil; Campo Grande; Feed crops; Feed grasses; Mato Grosso do Sul. |
Thesagro: |
Brachiaria Decumbens; Brachiaria Humidicola; Citogenética Vegetal; Gramínea Forrageira; Melhoramento Genético Vegetal; Planta Forrageira; Poliploidia. |
Thesaurus NAL: |
Brazil; cytogenetics; plant breeding; polyploidy. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/38215/1/fulltext.pdf
|
Marc: |
LEADER 02621naa a2200409 a 4500 001 1326409 005 2011-07-21 008 2007 bl uuuu u00u1 u #d 100 1 $aGALLO, P. H 245 $a2n Gamete formation in the genus Brachiaria (Poaceae$bPaniceae). 260 $c2007 500 $aCNPGC. 520 $aMicrosporogenesis of several Brachiaria species of the Brazilian collection at Embrapa Beef Cattle has been analyzed in detail. This paper reports abnormal cytokinesis in three accessions of three different species (Brachiaria humidicola, 2n = 4x = 36, Brachiaria decumbens, 2n = 4x = 36, and Brachiaria dura, 2n = 6x = 54). Chromosomes paired in bi-, tri-, and quadrivalents in these accessions, whereas chromosome segregation at meiosis I was characterized by exclusion of laggards as micronuclei. In a high number of meiocytes, the first sign of cytokinesis appeared only in metaphase II and did not divide the meiocyte into a dyad. Total absence of cytokinesis was also detected among meiocytes in the second division. Since in both cases the two metaphase plates were very close, they favored the rejoining of chromosome sets after anaphase II and formed a restitutional nucleus in telophase II. Second cytokinesis occurred after telophase II in most meiocytes. Monads, dyads, and triads with n or 2n nuclei were observed among meiotic products. The 2n gametes observed correspond to the first division restitution (FDR). The number of affected cells in each accession was variable, but the number of microspores with restitutional nucleus, including those scored in tetrads and the released ones, did not exceed 9%. Although polyploidy is common in the genus Brachiaria, its origin is still unclear. Current results suggest that 2n gametes may have contributed to the evolutionary history of the genus. 650 $aBrazil 650 $acytogenetics 650 $aplant breeding 650 $apolyploidy 650 $aBrachiaria Decumbens 650 $aBrachiaria Humidicola 650 $aCitogenética Vegetal 650 $aGramínea Forrageira 650 $aMelhoramento Genético Vegetal 650 $aPlanta Forrageira 650 $aPoliploidia 653 $aBrachiaria dura 653 $aBraquiária 653 $aBrasil 653 $aCampo Grande 653 $aFeed crops 653 $aFeed grasses 653 $aMato Grosso do Sul 700 1 $aMICHELETTI, P. L. 700 1 $aBOLDRINI, K. R. 700 1 $aRISSO-PASCOLOTTO, C. 700 1 $aPAGLIARINI, M. S. 700 1 $aVALLE, C. B. do 773 $tEuphytica, Wageningen, Holanda$gv. 154, n. 2, p. 255-260, 2007.
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