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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
30/09/2009 |
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Data da última atualização: |
13/10/2009 |
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Autoria: |
MENDES-BONATO, A. B.; RISSO-PASCOTTO, C.; PAGLIARINI, M. S.; VALLE, C. B. do. |
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Afiliação: |
ANDRÉA BEATRIZ MENDES-BONATO, UEM; CLAUDICÉIA RISSO-PASCOTTO, UEM; MARIA SUELY PAGLIARINI, UEM; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Normal microspore production after cell fusion in Brachiaria jubata (Gramineae). |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Genetics and Molecular Biology, v.26, n. 4, p. 517-520, 2003. |
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Idioma: |
Português |
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Conteúdo: |
Cytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species. |
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Palavras-Chave: |
Brachiaria jubata; Braquiária; Microsporogênese. |
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Thesagro: |
Gramínea Forrageira; Melhoramento Genético Vegetal; Pastagem. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 01468naa a2200229 a 4500
001 1512797
005 2009-10-13
008 2003 bl --- 0-- u #d
100 1 $aMENDES-BONATO, A. B.
245 $aNormal microspore production after cell fusion in Brachiaria jubata (Gramineae).
260 $c2003
520 $aCytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species.
650 $aGramínea Forrageira
650 $aMelhoramento Genético Vegetal
650 $aPastagem
653 $aBrachiaria jubata
653 $aBraquiária
653 $aMicrosporogênese
700 1 $aRISSO-PASCOTTO, C.
700 1 $aPAGLIARINI, M. S.
700 1 $aVALLE, C. B. do
773 $tGenetics and Molecular Biology$gv.26, n. 4, p. 517-520, 2003.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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| Registros recuperados : 24 | |
| 11. |  | PAGLIARINI, M. S.; RISSO-PASCOTTO, C.; SOUZA-KANESHIMA, A. M. de; VALLE, C. B. do. Analysis of meiotic behavior in selecting potential genitors among diploid and artifcially induced tetraploid accessions of Brachiaria ruziziensis (Poaceae). Euphytica, Wageningen, Holanda, v. 164, n.1 , p. 181-187, nov. 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 20. | | BOLDRINI, K. R.; MICHELETTI, P. L.; RISSO-PASCOTTO, C.; ADAMOWSKI, E. V.; PAGLIARINI, M. S.; VALLE, C. B. Um novo mecanismo de formação de gametas 2n em Brachiaria (POACEAE). In: CONGRESSO BRASILEIRO DE GENÉTICA, 51., 2005, Águas de Lindóia. Da Bioestatística à Bioinformática - a era da Genômica: [anais]. Águas de Lindóia: Sociedade Brasileira de Genética, 2005. p. 523 1 CD-ROM.| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 24 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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