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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
01/02/2010 |
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Data da última atualização: |
01/02/2010 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
FUZINATTO, V. A.; PAGLIARINI, M. S.; VALLE, C. B. do. |
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Afiliação: |
VERIDIANA APARECIDA FUZINATTO, UEM; MARIA SUELY PAGLIARINI, UEM; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Meiotic behavior in progenies from a hybrid between B. ruziziensis and B. brizantha (Poaceae). |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In:SIMPÓSIO INTERNACIONAL SOBRE MELHORAMENTO DE FORRAGEIRAS, 2., 2009, Campo Grande, MS. [Anais]... Campo Grande, MS: Embrapa Gado de Corte, 2009. II SIMF. Comitê editorial: Liana Jank; Lucimara Chiari; Rosângela Maria Simeão Resende. |
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Páginas: |
3 p. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Inglês |
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Notas: |
Resumo C 07. |
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Conteúdo: |
In the last three decades, the extensive use of some Brachiaria cultivars created directly from the natural genetic variability has placed Brazil as the major beef cattle exporter in the world. Interspecific hybridization is difficult to accomplish because only a few species are compatible (VALLE; SAVIDAN, 1996; VALLE; PAGLIARINI, 2009). Compatibility has been found among some species of the Group 5 (RENVOIZE et al., 1996): B. brizantha, B. decumbens and B. ruziziensis. Due to correlation between polyploidy and apomixis, Brachiaria breeding is not easy. Polyploid accessions with desirable agronomic characteristics are apomictics (VALLE; SAVIDAN, 1996), and sexuality is found only in diploid accessions. To overcome the barrier between sexual diploid and apomictic tetraploid accessions, Ferguson and Crowder (1974) proposed to create a cross-compatible, sexual tetraploid plant by doubling the chromosome number. The barrier was overcome a decade later, in Belgium, when diploid accessions of B. ruziziensis were tetraploidized with colchicine (SWENNE et al., 1981). In the genus Brachiaria, apomixis is pseudogamic, which means that viable gametes are necessary to fertilize the secondary nucleus of the embryo sac to guarantee endosperm development to produce healthy seeds (VALLE; SAVIDAN, 1996). But, in the genus, polyploidy is highly correlated with abnormal meiosis (MENDES-BONATO et al., 2002a; RISSOPASCOTTO et al., 2006). Previous cytogenetic analysis of F1 generations of B. ruziziensis x B. brizantha hybrids (RISSO-PASCOTTO et al., 2005) have been conducted and revealed that they differ in amount and kinds of meiotic abnormalities, indicating that selection for meiotic stability is possible among them. In this study, we analyzed for the first time, the microsporogenesis of six progenies of a crossing between a sexual tetraploidized accession of B. ruziziensis and a natural tetraploid of B. brizantha, in attempt to select apomictic progenies with high meiotic stability and high seed production to be released as new cultivars. MenosIn the last three decades, the extensive use of some Brachiaria cultivars created directly from the natural genetic variability has placed Brazil as the major beef cattle exporter in the world. Interspecific hybridization is difficult to accomplish because only a few species are compatible (VALLE; SAVIDAN, 1996; VALLE; PAGLIARINI, 2009). Compatibility has been found among some species of the Group 5 (RENVOIZE et al., 1996): B. brizantha, B. decumbens and B. ruziziensis. Due to correlation between polyploidy and apomixis, Brachiaria breeding is not easy. Polyploid accessions with desirable agronomic characteristics are apomictics (VALLE; SAVIDAN, 1996), and sexuality is found only in diploid accessions. To overcome the barrier between sexual diploid and apomictic tetraploid accessions, Ferguson and Crowder (1974) proposed to create a cross-compatible, sexual tetraploid plant by doubling the chromosome number. The barrier was overcome a decade later, in Belgium, when diploid accessions of B. ruziziensis were tetraploidized with colchicine (SWENNE et al., 1981). In the genus Brachiaria, apomixis is pseudogamic, which means that viable gametes are necessary to fertilize the secondary nucleus of the embryo sac to guarantee endosperm development to produce healthy seeds (VALLE; SAVIDAN, 1996). But, in the genus, polyploidy is highly correlated with abnormal meiosis (MENDES-BONATO et al., 2002a; RISSOPASCOTTO et al., 2006). Previous cytogenetic analysis of F1 generations of B. ruz... Mostrar Tudo |
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Palavras-Chave: |
Braquiária. |
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Thesagro: |
Brachiaria Brizantha; Brachiaria Ruziziensis; Gramínea Forrageira; Melhoramento Genético Vegetal; Pastagem. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02956naa a2200241 a 4500
001 1631869
005 2010-02-01
008 2009 bl uuuu u00u1 u #d
100 1 $aFUZINATTO, V. A.
245 $aMeiotic behavior in progenies from a hybrid between B. ruziziensis and B. brizantha (Poaceae).
260 $c2009
300 $a3 p.$c1 CD-ROM.
500 $aResumo C 07.
520 $aIn the last three decades, the extensive use of some Brachiaria cultivars created directly from the natural genetic variability has placed Brazil as the major beef cattle exporter in the world. Interspecific hybridization is difficult to accomplish because only a few species are compatible (VALLE; SAVIDAN, 1996; VALLE; PAGLIARINI, 2009). Compatibility has been found among some species of the Group 5 (RENVOIZE et al., 1996): B. brizantha, B. decumbens and B. ruziziensis. Due to correlation between polyploidy and apomixis, Brachiaria breeding is not easy. Polyploid accessions with desirable agronomic characteristics are apomictics (VALLE; SAVIDAN, 1996), and sexuality is found only in diploid accessions. To overcome the barrier between sexual diploid and apomictic tetraploid accessions, Ferguson and Crowder (1974) proposed to create a cross-compatible, sexual tetraploid plant by doubling the chromosome number. The barrier was overcome a decade later, in Belgium, when diploid accessions of B. ruziziensis were tetraploidized with colchicine (SWENNE et al., 1981). In the genus Brachiaria, apomixis is pseudogamic, which means that viable gametes are necessary to fertilize the secondary nucleus of the embryo sac to guarantee endosperm development to produce healthy seeds (VALLE; SAVIDAN, 1996). But, in the genus, polyploidy is highly correlated with abnormal meiosis (MENDES-BONATO et al., 2002a; RISSOPASCOTTO et al., 2006). Previous cytogenetic analysis of F1 generations of B. ruziziensis x B. brizantha hybrids (RISSO-PASCOTTO et al., 2005) have been conducted and revealed that they differ in amount and kinds of meiotic abnormalities, indicating that selection for meiotic stability is possible among them. In this study, we analyzed for the first time, the microsporogenesis of six progenies of a crossing between a sexual tetraploidized accession of B. ruziziensis and a natural tetraploid of B. brizantha, in attempt to select apomictic progenies with high meiotic stability and high seed production to be released as new cultivars.
650 $aBrachiaria Brizantha
650 $aBrachiaria Ruziziensis
650 $aGramínea Forrageira
650 $aMelhoramento Genético Vegetal
650 $aPastagem
653 $aBraquiária
700 1 $aPAGLIARINI, M. S.
700 1 $aVALLE, C. B. do
773 $tIn:SIMPÓSIO INTERNACIONAL SOBRE MELHORAMENTO DE FORRAGEIRAS, 2., 2009, Campo Grande, MS. [Anais]... Campo Grande, MS: Embrapa Gado de Corte, 2009. II SIMF. Comitê editorial: Liana Jank; Lucimara Chiari; Rosângela Maria Simeão Resende.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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| Registros recuperados : 14 | |
| 3. |  | PAGLIARINI, M. S.; FUZINATTO, V. A.; VALLE, C. B. do. Comportamento meiótico de progênies híbridas do gênero Brachiaria (Poaceae). 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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| 11. | | 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.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 12. | | BOLDRINI, K. R.; CALISTO, V.; FUZINATTO, V. A.; MESSAGE, H. J.; MENDES-BONATO, A. B.; PAGLIARINI, M. S.; VALLE, C. B. do. Desynapsis and precocious cytokinesis in Brachiaria humidicola (Poaceae) compromise meiotic division. In: CONGRESSO BRASILEIRO DE GENÉTICA, 53., 2007, Águas de Lindóia. Anais... Águas de Lindóia: SBG, 2007. p. 111 CNPGC.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 13. | | CALISTO, V.; FUZINATTO, V. A.; MESSAGE, H. J.; MENDES-BONATO, A. B.; BOLDRINI, K. R.; PAGLIARINI, M. S.; VALLE, C. B. do. Desynapsis and precocious cytokinesis in Brachiaria humidicola (Poaceae) compromise meiotic division. Journal of Genetics, Bangalore, v. 87, n. 1, p. 27-31, Apr. 2008. Research article.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 14. | | PAGLIARINI, M. S.; VALLE, C. B. do; BATISTA, L. A. R.; BONATO, A. B. M.; BOLDRINI, K. R.; ADAMOWSKI, E. de V.; SILVA, N. da; FUZINATTO, V. A.; FELISMINO, M. F.; PASCOTTO, C. R.; MESSAGE, H. J.; CALISTO, V. Cytogenetics of Brachiaria and Paspalum in relation to breeding. In: SIMPÓSIO INTERNACIONAL SOBRE MELHORAMENTO DE FORRAGEIRAS, 2007, Campo Grande, MS. Palestras_resumos [do]... Campo Grande, MS: Embrapa Gado de Corte, 2007. 24 p. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 14 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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