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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
30/07/2008 |
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Data da última atualização: |
25/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CALISTO, V.; FUZINATTO, V. A.; MESSAGE, H. J.; MENDES-BONATO, A. B.; BOLDRINI, K. R.; PAGLIARINI, M. S.; VALLE, C. B. do. |
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Afiliação: |
VERGÍLIO CALISTO, UNIVERSIDADE ESTADUAL DE MARINGÁ; VERIDIANA APARECIDA FUZINATTO, UNIVERSIDADE ESTADUAL DE MARINGÁ; HUGO JOSÉ MESSAGE, UNIVERSIDADE ESTADUAL DE MARINGÁ; ANDRÉA BEATRIZ MENDES-BONATO, UNIVERSIDADE ESTADUAL DE MARINGÁ; KELLEN REGINA BOLDRINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; MARIA SUELY PAGLIARINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Desynapsis and precocious cytokinesis in Brachiaria humidicola (Poaceae) compromise meiotic division. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Journal of Genetics, Bangalore, v. 87, n. 1, p. 27-31, Apr. 2008. |
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Idioma: |
Inglês |
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Notas: |
Research article. |
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Conteúdo: |
The forage grass species Brachiaria humidicola is native to African savannas. Owing to its good adaptation to poorly drained and infertile acid soils, it has achieved wide utilization for pastures in Brazilian farms. Among the 55 accessions of B. humidicola analysed from the Embrapa Beef Cattle collection, one (H022), presented desynapsis and an abnormal pattern of cytokinesis in the first meiotic division. Among 28 inflorescences analysed in this accession, 12 were affected by the anomaly. In affected meiocytes, the first cytokinesis occurred in metaphase I and was generally perpendicular to a wide-metaphase plate, dividing the genome into two parts with an equal or unequal number of chromosomes. The normal cytokinesis after telophase I did not occur, and the meiocytes entered metaphase II, progressing to the end of meiosis with the occurrence of the second cytokinesis. As the first cytokinesis occurred precociously, whereas the second was normal, tetrads were formed but with unbalanced chromosome numbers in microspores. Abnormal cytokinesis occurred only in those meiocytes that underwent desynapsis after diakinesis. The implications of this abnormality in the Brachiaria breeding programme are discussed. |
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Thesagro: |
Brachiaria Humidicola; Citogenética Vegetal; Gramínea Forrageira; Meiose; Melhoramento Genético Vegetal; Pastagem; Planta Forrageira. |
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Thesaurus Nal: |
Cytogenetics; Cytokinesis; Forage grasses; Meiosis; Pastures; Plant breeding. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02255naa a2200361 a 4500
001 1326517
005 2023-07-25
008 2008 bl uuuu u00u1 u #d
100 1 $aCALISTO, V.
245 $aDesynapsis and precocious cytokinesis in Brachiaria humidicola (Poaceae) compromise meiotic division.
260 $c2008
500 $aResearch article.
520 $aThe forage grass species Brachiaria humidicola is native to African savannas. Owing to its good adaptation to poorly drained and infertile acid soils, it has achieved wide utilization for pastures in Brazilian farms. Among the 55 accessions of B. humidicola analysed from the Embrapa Beef Cattle collection, one (H022), presented desynapsis and an abnormal pattern of cytokinesis in the first meiotic division. Among 28 inflorescences analysed in this accession, 12 were affected by the anomaly. In affected meiocytes, the first cytokinesis occurred in metaphase I and was generally perpendicular to a wide-metaphase plate, dividing the genome into two parts with an equal or unequal number of chromosomes. The normal cytokinesis after telophase I did not occur, and the meiocytes entered metaphase II, progressing to the end of meiosis with the occurrence of the second cytokinesis. As the first cytokinesis occurred precociously, whereas the second was normal, tetrads were formed but with unbalanced chromosome numbers in microspores. Abnormal cytokinesis occurred only in those meiocytes that underwent desynapsis after diakinesis. The implications of this abnormality in the Brachiaria breeding programme are discussed.
650 $aCytogenetics
650 $aCytokinesis
650 $aForage grasses
650 $aMeiosis
650 $aPastures
650 $aPlant breeding
650 $aBrachiaria Humidicola
650 $aCitogenética Vegetal
650 $aGramínea Forrageira
650 $aMeiose
650 $aMelhoramento Genético Vegetal
650 $aPastagem
650 $aPlanta Forrageira
700 1 $aFUZINATTO, V. A.
700 1 $aMESSAGE, H. J.
700 1 $aMENDES-BONATO, A. B.
700 1 $aBOLDRINI, K. R.
700 1 $aPAGLIARINI, M. S.
700 1 $aVALLE, C. B. do
773 $tJournal of Genetics, Bangalore$gv. 87, n. 1, p. 27-31, Apr. 2008.
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| 3. |  | FRAZÃO, D. S.; MARANGUAPE, J. S.; BARROS, P. V. M.; VASCONCELOS, B. F.; SOUSA, A. A.; POMPEU, R. C. F. F. Avaliação morfofisiológica de genótipos de Urochloa mosambicensis sob sombreamento. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA CAPRINOS E OVINOS, 11., 2022, Sobral. Anais... Sobral: Embrapa Caprinos e Ovinos, 2023. p. 52-53. (Embrapa Caprinos e Ovinos. Eventos técnicos & científicos).| Tipo: Resumo em Anais de Congresso |
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