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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
20/03/2000 |
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Data da última atualização: |
18/04/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PAGLIARINI, M. S.; TAKAYAMA, S. Y.; FREITAS, P. M.; CARRARO, L. R.; SAMOWSKI, E. V.; SILA, N.; BATISTA, L. A. R. |
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Afiliação: |
M. S. PAGLIARINI, UEM; S. Y. TAKAYAMA, UEM; P. M. FREITAS, UEM; L. R. CARRARO, UEM; E. V. ADAMOWSKI, UEM; N. SILVA, UEM; LUIZ ALBERTO ROCHA BATISTA, CPPSE. |
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Título: |
Failure of cytokinesis and 2n gamete formation in Brazilian accessions of Paspalum. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Euphytica, v. 108, p. 129-135, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Cytological analysis on 112 Brazilian accessions of Paspalum showed that 52 were affected by failure of first or second cytokinesis during microsporogenesis. When the failure of cytokinesis occurred only in the first division and in the second division the cytokinesis was normal, a dyad of microspores was formed. In most of them the two cells remained binucleate, but in some a restitutional nucleus was observed. When the first division was normal and the failure of cytokinesis occurred only in the second division, dyads and triads were observed. A restitutional nucleus in one or both cells of the dyad, or in the binucleate cell of the triad was also observed. The percentage of dyads and triads varied among accessions, reaching 15.75 of the sporads in some. The absence of cytokinesis indicates the possibility that the widespread occurrence of polyploidy in the genus Paspalum originates from 2n pollen grains. |
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Palavras-Chave: |
2n gametes; Cytikinesis; Polyploid. |
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Thesaurus Nal: |
microsporogenesis; Paspalum. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/229217/1/FailureCytokinesis2n.pdf
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Marc: |
LEADER 01615naa a2200253 a 4500
001 1044723
005 2023-04-18
008 1999 bl uuuu u00u1 u #d
100 1 $aPAGLIARINI, M. S.
245 $aFailure of cytokinesis and 2n gamete formation in Brazilian accessions of Paspalum.$h[electronic resource]
260 $c1999
520 $aCytological analysis on 112 Brazilian accessions of Paspalum showed that 52 were affected by failure of first or second cytokinesis during microsporogenesis. When the failure of cytokinesis occurred only in the first division and in the second division the cytokinesis was normal, a dyad of microspores was formed. In most of them the two cells remained binucleate, but in some a restitutional nucleus was observed. When the first division was normal and the failure of cytokinesis occurred only in the second division, dyads and triads were observed. A restitutional nucleus in one or both cells of the dyad, or in the binucleate cell of the triad was also observed. The percentage of dyads and triads varied among accessions, reaching 15.75 of the sporads in some. The absence of cytokinesis indicates the possibility that the widespread occurrence of polyploidy in the genus Paspalum originates from 2n pollen grains.
650 $amicrosporogenesis
650 $aPaspalum
653 $a2n gametes
653 $aCytikinesis
653 $aPolyploid
700 1 $aTAKAYAMA, S. Y.
700 1 $aFREITAS, P. M.
700 1 $aCARRARO, L. R.
700 1 $aSAMOWSKI, E. V.
700 1 $aSILA, N.
700 1 $aBATISTA, L. A. R.
773 $tEuphytica$gv. 108, p. 129-135, 1999.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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| Registros recuperados : 9 | |
| 4. |  | TAKAYAMA, S. Y.; FREITAS, P. M de; PAGLIARINI, M. S.; BATISTA, L. A. R. Determinação do número de cromossomos em acessos de Paspalum (grupo plicatula). Revista Brasileira de Genética, Ribeirão Preto, SP, v.19, n.3, (Suppl.), p.133, Set. 1996.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 7. | | PAGLIARINI, M. S.; FREITAS, P. M. de; TAKAYAMA, S. Y.; BATISTA, L. A. R. Potencial forrageiro de acessos de germoplasma de gênero Paspalum. Ensaio 1993/94. Revista Brasileira de Genética, Ribeirão Preto, SP, v.19, n.3, p.137, Set. 1996.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 8. | | FREITAS, P. M. de; CARRARO, L. R.; TAKAYAMA, S. Y.; ADAMOWSKI, E. de V.; PAGLIARINI, M. S.; BATISTA, L. A. R. Citogenética de Paspalum. II. Determinação do número de cromossomos. Revista Brasileira de Genética, v.20, n.3, suppl., A.100, p.86, 1997.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 9. | | PAGLIARINI, M. S.; TAKAYAMA, S. Y.; FREITAS, P. M.; CARRARO, L. R.; SAMOWSKI, E. V.; SILA, N.; BATISTA, L. A. R. Failure of cytokinesis and 2n gamete formation in Brazilian accessions of Paspalum. Euphytica, v. 108, p. 129-135, 1999.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| Registros recuperados : 9 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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