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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
05/08/2011 |
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Data da última atualização: |
08/08/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BOLDRINI, K. R.; PAGLIARINI, M. S.; VALLE, C. B. do. |
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Afiliação: |
KELLEN REGINA BOLDRINI, UEM; M. S. PAGLIARINI, UEM; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Evidence of natural hybridization in Brachiaria humidicola (Rendle) Schweick. (Poaceae: Panicoideae: Paniceae). |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Journal of Genetics, v. 89, n. 1, p.91-94, Apr. 2010. |
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Idioma: |
Inglês |
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Conteúdo: |
Polyploidy and aneuploidy are conspicuous features of chromosomal evolution in the Poaceae; at least 80% of grass species are of polyploid origin (Stebbins 1985). The original basic chromosome number for the Poaceae is not known and has been the subject of much speculation. In the large tribe Paniceae, which includes the genus Brachiaria, the most common basic chromosome number is x = 9 (DeWet 1986). The predominance of x = 9 in Brachiaria genus had been reported in several studies (Basappa et al. 1987; Honfi et al. 1990; Bernini and Marin-Morales 2001; Mendes-Bonato et al. 2002, 2006; Utsunomiya et al. 2005). More recently, a new chromosome number, x = 6, was determined for B. dictyoneura (Risso-Pascotto et al. 2006). There is a large predominance of polyploid forms in the genus Brachiaria and tetraploids prevail. The origin of polyploidy, however, has never been pursued in this genus. Cytological evidence from analysis of meiotic behaviour, including chromosome pairing at diakinesis, led to the suggestion that autotetraploidy and segmental allopolyploidy could have contributed to evolution in some species (Mendes-Bonato et al. 2002, 2006;Utsunomiya et al. 2005). On the other hand, in two pentaploid accessions of B. brizantha (2n = 5x = 45) there was clear evidence of allopolyploidy (Mendes et al. 2006). This paper reports the unusual cytological behaviour during meiosis in one accession of Brachiaria humidicola from the Embrapa Beef Cattle germplasm collection. |
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Thesagro: |
Brachiaria Humidicola; Melhoramento Genético Vegetal; Pastagem. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/39338/1/journal-of-genetics.pdf
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Marc: |
LEADER 02076naa a2200181 a 4500
001 1897403
005 2011-08-08
008 2010 bl uuuu u00u1 u #d
100 1 $aBOLDRINI, K. R.
245 $aEvidence of natural hybridization in Brachiaria humidicola (Rendle) Schweick. (Poaceae$bPanicoideae: Paniceae).$h[electronic resource]
260 $c2010
520 $aPolyploidy and aneuploidy are conspicuous features of chromosomal evolution in the Poaceae; at least 80% of grass species are of polyploid origin (Stebbins 1985). The original basic chromosome number for the Poaceae is not known and has been the subject of much speculation. In the large tribe Paniceae, which includes the genus Brachiaria, the most common basic chromosome number is x = 9 (DeWet 1986). The predominance of x = 9 in Brachiaria genus had been reported in several studies (Basappa et al. 1987; Honfi et al. 1990; Bernini and Marin-Morales 2001; Mendes-Bonato et al. 2002, 2006; Utsunomiya et al. 2005). More recently, a new chromosome number, x = 6, was determined for B. dictyoneura (Risso-Pascotto et al. 2006). There is a large predominance of polyploid forms in the genus Brachiaria and tetraploids prevail. The origin of polyploidy, however, has never been pursued in this genus. Cytological evidence from analysis of meiotic behaviour, including chromosome pairing at diakinesis, led to the suggestion that autotetraploidy and segmental allopolyploidy could have contributed to evolution in some species (Mendes-Bonato et al. 2002, 2006;Utsunomiya et al. 2005). On the other hand, in two pentaploid accessions of B. brizantha (2n = 5x = 45) there was clear evidence of allopolyploidy (Mendes et al. 2006). This paper reports the unusual cytological behaviour during meiosis in one accession of Brachiaria humidicola from the Embrapa Beef Cattle germplasm collection.
650 $aBrachiaria Humidicola
650 $aMelhoramento Genético Vegetal
650 $aPastagem
700 1 $aPAGLIARINI, M. S.
700 1 $aVALLE, C. B. do
773 $tJournal of Genetics$gv. 89, n. 1, p.91-94, Apr. 2010.
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Embrapa Gado de Corte (CNPGC) |
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| Registros recuperados : 617 | |
| 66. |  | VALLE, C. B. do; SIMIONI, C.; PANIAGO, B. da C. Cruzamentos intraespecíficos em Brachiaria decumbens. In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 5., 2009, Guarapari. O melhoramento e os novos cenários da agricultura: anais. Vitória: Incaper, 2009. 1 CD-ROM. (Incaper. Documentos, 11). CBMP 2009. Organizado por Romário Gava Ferrão, Frederico de Pina Matta, Maria Amélia Gava Ferrão, João Cândido de Souza, Adelaide de F. S. da Costa, Liliâm Maria Ventorim Ferrão. 4 p. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 68. | | JANK, L.; RESENDE, R. M. S.; VALLE, C. B. do. Breeding of Panicum maximum. In: SIMPÓSIO INTERNACIONAL SOBRE MELHORAMENTO DE FORRAGEIRAS, 2007, Campo Grande, MS. Palestras_resumos [do]... Campo Grande, MS: Embrapa Gado de Corte, 2007. 15 p. 1 CD-ROM. CNPGC.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 617 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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