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| Registros recuperados : 28 | |
| 3. |  | MENDES-BONATO, A. B.; FELISMINO, M. F.; CALISTO, V.; PAGLIARINI, M. S.; VALLE, C. B. do. Comportamento meiótico e fertilidade do pólen em progênies de Brachiaria brizantha duplicadas artificialmente. In: SIMPÓSIO INTERNACIONAL SOBRE MELHORAMENTO DE FORRAGEIRAS, 2007, Campo Grande, MS. Palestras_resumos [do]... Campo Grande, MS: Embrapa Gado de Corte, 2007. 3 p. 1 CD-ROM.| Biblioteca(s): Embrapa Gado de Corte. |
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| 16. | | MENDES-BONATO, A. B.; FUZINATTO, V. A.; CALISTO, V.; MESSAGE, H. J.; PAGLIARINI, M. S.; VALLE, C. B. do. Precocious cytokinesis in Brachiaria humidicola (Poaceae) affects microsporogenesis. In: SIMPÓSIO INTERNACIONAL SOBRE MELHORAMENTO DE FORRAGEIRAS, 2007, Campo Grande, MS. Palestras_resumos [do]... Campo Grande, MS: Embrapa Gado de Corte, 2007. 3 p. 1 CD-ROM. CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 18. | | PAGLIARINI, M. S.; RISSO-PASCOTTO, C.; MENDES-BONATO, A. B.; FELISMINO, M. F.; SILVA, N. da; SOUZA-KANESHIMA, A. M. de; CALISTO, V.; VALLE, C. B. do. Analysis of meiotic behaviour in selecting potential genitors among artificially induced tetraploid acessions of Brachiaria ruziziensis and B. brizantha (Poaceae). In: CONGRESSO INTERNACIONAL DE REPRODUÇÃO SEXUAL EM PLANTAS, 20., 2008, Brasília, DF. [Anais...]. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. 240 p. (Embrapa Recursos Genéticos e Biotecnologia. Documentos, 259). Capa e conteúdo em inglês. Título em inglês: XX International Congress on Sexual Plant Reproduction. p. 116-117| Biblioteca(s): Embrapa Gado de Corte. |
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| 19. | | MENDES-BONATO, A. B.; FELISMINO, M. F.; KANESHIMA, A. M. S.; PESSIM, C.; CALISTO, V.; PAGLIARINI, M. S.; VALLE, C. B. do. Abnormal meiosis in tetraploid genotypes of Brachiaria brizantha (Poaceae) induced by colchicine: its implications for breeding. Journal of Applied Genetics, v. 50, n. 2, p. 83-87, 2009.| Biblioteca(s): Embrapa Gado de Corte. |
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| 20. | | JUNQUEIRA FILHO, R. G.; MENDES-BONATO, A. B.; PAGLIARINI, M. S.; BIONE, N. C. P.; VALLE, C. B. D.; PENTEADO, M. I. D. O. Absence of microspore polarity, symetric divisions and pollen cell fate in Brachiaria decumbens (Gramineae). Genome, v. 46, n. 83-88, 2003.| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 28 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
10/07/2009 |
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Data da última atualização: |
20/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MENDES-BONATO, A. B.; RISSO-PASCOTTO, C.; PAGLIARINI, M. S.; VALLE, C. B. do. |
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Afiliação: |
ANDREA BEATRIZ MENDES-BONATO, UNIVERSIDADE ESTADUAL DE MARINGÁ; CLAUDICÉIA RISSO-PASCOTTO, UNIVERSIDADE ESTADUAL DE MARINGÁ; MARIA SUELY PAGLIARINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Chromosome number and meiotic behaviour in Brachiaria jubata (Gramineae). |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Journal of Genetics, Bangalore, v. 85, n. 1, p. 83-87, Apr. 2006. |
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Idioma: |
Inglês |
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Notas: |
Research note. |
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Conteúdo: |
The production of new genetic variability through hybridization has been undertaken in Brachiaria, an important forage grass genus of African origin widely used in pastures in the Brazilian tropics. Although the genus comprises about 100 species, only a few of them present favourable agronomic attributes and are explored. In the genus Brachiaria, the majority of species and accessions are polyploid and apomictic, which makes breeding through hybridization more complex. Sexuality has been found in diploids and eventually among tetraploids with normal meiosis. Brachiaria jubata presents good forage value and adaptation to riverbanks and lake margins, and is therefore relevant to pasture systems in the tropics. Furthermore, the most interesting form of resistance to spittlebugs?antibiosis?was identified in one accession of B. jubata. Thus its interest in the Brazilian breeding programme lies in the possibility of using hybridization to transfer high resistance to this insect to susceptible accessions. This paper reports chromosome numbers and meiotic behaviour in 21 accessions of this species as a tool in selecting promising ones for crossing. Only one accession was found to be diploid; the others were tetraploid. Microsporogenesis was normal in the diploid accession, while among the tetraploid ones, irregular chromosome segregation leading to unbalanced gamete formation was common but variable. Pollen fertility among tetraploid accessions was high. |
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Palavras-Chave: |
Brachiaria jubata; Braquiária. |
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Thesagro: |
Citogenética; Gramínea Forrageira; Meiose; Melhoramento Genético Vegetal; Pastagem; Poliploidia. |
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Thesaurus NAL: |
Chromosome number; Meiosis; Microsporogenesis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02315naa a2200301 a 4500
001 1327023
005 2023-07-20
008 2006 bl uuuu u00u1 u #d
100 1 $aMENDES-BONATO, A. B.
245 $aChromosome number and meiotic behaviour in Brachiaria jubata (Gramineae).
260 $c2006
500 $aResearch note.
520 $aThe production of new genetic variability through hybridization has been undertaken in Brachiaria, an important forage grass genus of African origin widely used in pastures in the Brazilian tropics. Although the genus comprises about 100 species, only a few of them present favourable agronomic attributes and are explored. In the genus Brachiaria, the majority of species and accessions are polyploid and apomictic, which makes breeding through hybridization more complex. Sexuality has been found in diploids and eventually among tetraploids with normal meiosis. Brachiaria jubata presents good forage value and adaptation to riverbanks and lake margins, and is therefore relevant to pasture systems in the tropics. Furthermore, the most interesting form of resistance to spittlebugs?antibiosis?was identified in one accession of B. jubata. Thus its interest in the Brazilian breeding programme lies in the possibility of using hybridization to transfer high resistance to this insect to susceptible accessions. This paper reports chromosome numbers and meiotic behaviour in 21 accessions of this species as a tool in selecting promising ones for crossing. Only one accession was found to be diploid; the others were tetraploid. Microsporogenesis was normal in the diploid accession, while among the tetraploid ones, irregular chromosome segregation leading to unbalanced gamete formation was common but variable. Pollen fertility among tetraploid accessions was high.
650 $aChromosome number
650 $aMeiosis
650 $aMicrosporogenesis
650 $aCitogenética
650 $aGramínea Forrageira
650 $aMeiose
650 $aMelhoramento Genético Vegetal
650 $aPastagem
650 $aPoliploidia
653 $aBrachiaria jubata
653 $aBraquiária
700 1 $aRISSO-PASCOTTO, C.
700 1 $aPAGLIARINI, M. S.
700 1 $aVALLE, C. B. do
773 $tJournal of Genetics, Bangalore$gv. 85, n. 1, p. 83-87, Apr. 2006.
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