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Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
27/03/2019 |
Data da última atualização: |
27/03/2019 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
ROSA, D.; RIBEIRO, J.; GOULART, C.; FLORES CANTILLANO, R. F. |
Afiliação: |
ROSA, Débora; RIBEIRO, Jardel; GOULART, Carolina; RUFINO FERNANDO FLORES CANTILLANO, CPACT. |
Título: |
Qualificação de uma seleção de morangueiro: caracterização fisico-quimica de genótipos de morango. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
In: MOSTRA DA PRODUÇÃO UNIVERSITÁRIA,17., 2018, Rio Grande. Diferentes aprendizados, múltiplos saberes: resumos. Rio Grande: FURG, 2018. |
Idioma: |
Português |
Palavras-Chave: |
Melhoramento genético; Morangueiro. |
Thesagro: |
Genótipo. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/195058/1/Fernando-Cantillano-resumo-17-MPU-Debora-Rosa.pdf
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Marc: |
LEADER 00638nam a2200169 a 4500 001 2107530 005 2019-03-27 008 2018 bl uuuu u00u1 u #d 100 1 $aROSA, D. 245 $aQualificação de uma seleção de morangueiro$bcaracterização fisico-quimica de genótipos de morango.$h[electronic resource] 260 $aIn: MOSTRA DA PRODUÇÃO UNIVERSITÁRIA,17., 2018, Rio Grande. Diferentes aprendizados, múltiplos saberes: resumos. Rio Grande: FURG$c2018 650 $aGenótipo 653 $aMelhoramento genético 653 $aMorangueiro 700 1 $aRIBEIRO, J. 700 1 $aGOULART, C. 700 1 $aFLORES CANTILLANO, R. F.
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Embrapa Clima Temperado (CPACT) |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
01/02/2008 |
Data da última atualização: |
19/06/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
MENDES-BONATO, A. B.; PAGLIARINI, M. S.; VALLE, C. B. do. |
Afiliação: |
ANDRÉA BEATRIZ MENDES-BONATO, UNIVERSIDADE ESTADUAL DE MARINGÁ; MARIA SUELY PAGLIARINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; CACILDA BORGES DO VALLE, CNPGC. |
Título: |
Meiotic arrest compromises pollen fertility in an interspecific hybrid between Brachiaria ruziziensis x Brachiaria decumbens (Poaceae: Paniceae). |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Brazilian Archives of Biology and Technology, v. 50, n. 5, p. 831-837, Sep. 2007. |
DOI: |
https://doi.org/10.1590/S1516-89132007000500011 |
Idioma: |
Inglês |
Conteúdo: |
Microsporogenesis was analyzed in an interspecific hybrid between an artificially tetraploidized sexual accession of Brachiaria ruziziensis (2n=4x=36) and a natural apomictic tetraploid accession of B. decumbens. Syncytes involving a large number of cells were recorded in 15.4% of meiocytes. Meiosis progressed normally in syncytes during prophase I; in metaphase I, however, several nuclei were found fusioned, showing chromosome stickiness and several chromosome fragments. Meiosis was arrested in metaphase I and pycnotic nuclei and micronuclei were formed. Abnormal cytokinesis fractionated the syncyte into abnormal meiotic products that were covered by the pollen wall. Meiocytes in leptotene were recorded in all the slides prepared for both meiotic divisions, and abnormal ?pollen grains? with well-developed pollen wall but containing leptotene nuclei were recorded in 9.18% of grains analyzed. These findings suggested that the meiocytes received the signal to enter meiosis but lacked the signal to proceed beyond leptotene. Despite the absence of the meiotic process, such cells were covered by pollen grain wall. Total pollen sterility resulted from these abnormalities combined with still others observed among meiocytes. |
Thesagro: |
Apomixia; Brachiaria Decumbens; Brachiaria Ruziziensis; Citogenética Vegetal; Esterilidade; Fertilidade; Gramínea Forrageira; Hibridação; Hibrido; Melhoramento Genético Vegetal; Planta Forrageira; Pólen. |
Thesaurus NAL: |
Cell fusion; Cytogenetics; Hybridization; Hybrids; Microsporogenesis; Plant breeding; Poaceae; Pollination. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/326408/1/Meiotic-arrest-compromises-pollen-2007.pdf
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Marc: |
LEADER 02446naa a2200397 a 4500 001 1326408 005 2023-06-19 008 2007 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1590/S1516-89132007000500011$2DOI 100 1 $aMENDES-BONATO, A. B. 245 $aMeiotic arrest compromises pollen fertility in an interspecific hybrid between Brachiaria ruziziensis x Brachiaria decumbens (Poaceae$bPaniceae). 260 $c2007 520 $aMicrosporogenesis was analyzed in an interspecific hybrid between an artificially tetraploidized sexual accession of Brachiaria ruziziensis (2n=4x=36) and a natural apomictic tetraploid accession of B. decumbens. Syncytes involving a large number of cells were recorded in 15.4% of meiocytes. Meiosis progressed normally in syncytes during prophase I; in metaphase I, however, several nuclei were found fusioned, showing chromosome stickiness and several chromosome fragments. Meiosis was arrested in metaphase I and pycnotic nuclei and micronuclei were formed. Abnormal cytokinesis fractionated the syncyte into abnormal meiotic products that were covered by the pollen wall. Meiocytes in leptotene were recorded in all the slides prepared for both meiotic divisions, and abnormal ?pollen grains? with well-developed pollen wall but containing leptotene nuclei were recorded in 9.18% of grains analyzed. These findings suggested that the meiocytes received the signal to enter meiosis but lacked the signal to proceed beyond leptotene. Despite the absence of the meiotic process, such cells were covered by pollen grain wall. Total pollen sterility resulted from these abnormalities combined with still others observed among meiocytes. 650 $aCell fusion 650 $aCytogenetics 650 $aHybridization 650 $aHybrids 650 $aMicrosporogenesis 650 $aPlant breeding 650 $aPoaceae 650 $aPollination 650 $aApomixia 650 $aBrachiaria Decumbens 650 $aBrachiaria Ruziziensis 650 $aCitogenética Vegetal 650 $aEsterilidade 650 $aFertilidade 650 $aGramínea Forrageira 650 $aHibridação 650 $aHibrido 650 $aMelhoramento Genético Vegetal 650 $aPlanta Forrageira 650 $aPólen 700 1 $aPAGLIARINI, M. S. 700 1 $aVALLE, C. B. do 773 $tBrazilian Archives of Biology and Technology$gv. 50, n. 5, p. 831-837, Sep. 2007.
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