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| Registros recuperados : 484 | |
| 101. |  | CRUZ, D. G.; CORDEIRO, R. C.; LOPES, A. J. O.; ROCHA, L. V.; SANTOS, C. P. Evaluation of the survival and nematophagous efficacy of Duddingtonia flagrans isolates and Arthobotrys spp. affer passage through the ovine digestive trace. Revista Brasileira de Parasitologia Veterinária, v. 13, p. 258, 2004. Suplemento 1. Resumo 203. Edição de anais do 13o. Congresso Brasileiro de Parasitologia Veterinária e o 1o. Simpósio Latino-Americano de Rickettsioses, Ouro Preto, MG, set. 2004.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 107. | | OLIVEIRA, J. C. V. de; RIBEIRO, M. N.; GOMES FILHO, M. A.; ROCHA, L. L. da. Perfil etnológico de la raza caprina Moxotó en el Estado de Pernambuco, Brasil. CONGRESSO IBEROAMERICANO DE RAZAS CRIOLLAS Y AUTOCTONAS, 6.; SIMPOSIO IBEROAMERICANO SOBRE CONSERVACION Y UTILIZACION DE RECURSOS ZOOGENÉTICOS, 4., 2003, Recife. [S.l.]: Federación Iberoamericana de Razas Criollas: CYTED, 2003. Não paginado.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 110. | | FERREIRA, B. R. C.; MARTINS, M. M.; ROCHA, L. A. L. da; CUNHA, E. F. M. Caracterização morfoagronômica de cruzamentos naturais de acessos de mandioca do banco de germoplasma da Embrapa Amazônia Oriental. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 25., 2022, Belém, PA. Anais... Belém, PA: Embrapa Amazônia Oriental, 2023. p. 28-29. (Embrapa Amazônia Oriental. Eventos técnicos & científicos, 1).| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 111. | | PEIXOTO, A. L. F.; MOREIRA, F. M.; LOPES, J. P.; HADDAD, F.; ROCHA, L. DE S. Viabilidade e compatibilidade de Trichoderma asperellum. In: CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 15., 2021. Mulheres na ciência desafios, oportunidades e conquistas. Cruz das Almas, BA: Embrapa Mandioca e Fruticultura, 2021. 109 f. il. PDF.| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 112. | | ROCHA, L. DE S.; HADDAD, F.; PINTO, L. B.; INVENÇAO, D. R. S.; BRAGANÇA, C. A. D.; D'AVILA, L. S. Progresso da sigatoka negra (Mycosphaerella fijiensis Morelet) e a sigatoka amarela (Mycosphaerella musicola Leach ) em mudas de grande naine. In: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 51., 2019, Recife. Os avanços da Fitopatologia na Era Genômica: anais. Recife: SBF: UFPRE/PPGF, 2019. 1 p.| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 113. | | LUQUINE, L. S.; BARBOSA, D. H. S. G.; FERREIRA, C. F.; ROCHA, L. DE S.; AMORIM, E. P. Primeiro relato de meloidogyne enterolobii parasitando Bananeira no brasil. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 26., 2019, Juazeiro, BA/Petrolina, PE. Fruticultura de precisão: desafios e oportunidades - anais. Petrolina: Embrapa Semiárido: UNIVASF: SBF, 2019. 4 p.| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 115. | | CHIAVEGATTO, R. B.; CHAVES, A. L. A.; ROCHA, L. C.; BENITES, F. R. G.; PERUZZI, L.; TECHIO, V. H. Heterochromatin Bands and rDNA Sites Evolution in Polyploidization Events in Cynodon Rich. (Poaceae). Plant Molecular Biology Reporter, v. 37, n. 5-6, p. 477-487, 2019.| Biblioteca(s): Embrapa Gado de Leite. |
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| 116. | | ROCHA, L. C.; BUSTAMANTE, F. de O.; SILVEIRA, R. A. D. S.; TORRES, G. A.; MITTELMANN, A.; TECHIO, V. H. Functional repetitive sequences and fragile sites in chromosomes of Lolium perenne L. Protoplasma, v. 252, n. 2, p. 451-460, 2015.| Biblioteca(s): Embrapa Gado de Leite. |
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| 117. | | CARDOSO, M. J.; CARVALHO, H. W. L. de; ROCHA, L. M. P. da; BASTOS, E. A.; MELO, F. de B. Graus-dia, eficiência de uso da água de híbridos de milho em condições edafoclimáticas contrastante. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 20.; SIMPÓSIO DE MUDANÇAS CLIMÁTICAS E DESERTIFICAÇÃO DO SEMIÁRIDO BRASILEIRO, 5., 2017, Juazeiro, Petrolina. A agrometeorologia na solução de problemas multiescala: anais. Petrolina: Embrapa Semiárido: Univasf, 2017.| Biblioteca(s): Embrapa Meio-Norte; Embrapa Milho e Sorgo. |
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| 118. | | LUIZ NETO, A.; CECCON, G.; FONSECA, I. C.; SEREIA, R. C.; SILVA, J. F. da; ROCHA, L. M. P. da. Cultivares de milho safrinha de ciclo precoce e normal, em Mato Grosso do Sul, 2010. In: SEMINÁRIO NACIONAL DE MILHO SAFRINHA, 11, 2011, Lucas do Rio Verde, MT. Anais. Lucas do Rio Verde: Fundação Rio Verde, 2011. p. 197-204.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 119. | | SILVA, J. F. da; CECCON, G.; LEITE, L. F.; GARCIA, T. C. L.; ROCHA, L. M. P. da. Cultivares de milho safrinha de diferentes ciclos avaliados em Mato Grosso do Sul, em 2010. In: SEMINÁRIO NACIONAL DE MILHO SAFRINHA, 11, 2011, Lucas do Rio Verde. De safrinha a grande safra: anais. Lucas do Rio Verde: Fundação Rio Verde: ABMS, 2011. 251-258| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 120. | | SILVA, J. F. da; CECCON, G.; LEITE, L. F.; GARCIA, T. C. L.; ROCHA, L. M. P. da. Cultivares de milho safrinha de diferentes ciclos avaliados em Mato Grosso do Sul, em 2010. In: SEMINÁRIO NACIONAL DE MILHO SAFRINHA, 11, 2011, Lucas do Rio Verde, MT. Anais. Lucas do Rio Verde: Fundação Rio Verde, 2011. p. 251-258.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| Registros recuperados : 484 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
12/01/2018 |
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Data da última atualização: |
27/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
ROCHA, L. C.; SILVA, G. A.; BUSTAMANTE, F. O.; SILVEIRA, R. A. D.; MITTELMANN, A.; TECHIO, V. H. |
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Afiliação: |
L. C. Rocha, UFLA; G. A. Silva, UFLA; F. O. Bustamante, UFLA; R. A. D. Silveira, UFLA; ANDREA MITTELMANN, CNPGL; V. H . TECHIO, UFLA. |
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Título: |
Dynamics of 45S rDNA sites in the cell cycle: fragile sites and chromosomal stability in Lolium and Festuca. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 16, n. 1, 2017. |
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DOI: |
10.4238/gmr16019156 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract Analyses carried out with fluorescence in situ hybridization (FISH) in C-metaphases of the Lolium-Festuca complex have shown the occurrence of spontaneous fragile sites (FSs) in 45S rDNA regions. FSs are expressed as gaps but they do not result in breaks or chromosomal fragments in these species. These gaps have high DNA condensation observed as thin chromatin fibers that connect the apparent segments of the fragile chromosome, allowing for genomic stability. Assessing the behavior of these regions in the cell cycle of Lolium and Festuca species may lead to a better understanding of the dynamics that preserve stability during cell division. Furthermore, it is interesting to track the dynamics of chromosomes bearing 45S rDNA sites in the cell cycle as well as to observe the expression of FSs with no effect of the mitotic block. We observed variation in both the number and size of 45S FISH signals from the S/G2 phases of interphase and from prophase to anaphase where gaps in 45S rDNA sites also were observed. The change in the degree of condensation of the 45S site begins in the S/G2 phase and appears to be related to the transcriptional demand. Taking into account that the number of 45S rDNA sites tends to be re-established when cells reach telophase, we suggest that the chromatin fiber goes back to the normal condensation level to the anaphase (after segregation), allowing for the approximation of chromosome segments and ensuring dynamics that favor the genomic stability of these species. MenosAbstract Analyses carried out with fluorescence in situ hybridization (FISH) in C-metaphases of the Lolium-Festuca complex have shown the occurrence of spontaneous fragile sites (FSs) in 45S rDNA regions. FSs are expressed as gaps but they do not result in breaks or chromosomal fragments in these species. These gaps have high DNA condensation observed as thin chromatin fibers that connect the apparent segments of the fragile chromosome, allowing for genomic stability. Assessing the behavior of these regions in the cell cycle of Lolium and Festuca species may lead to a better understanding of the dynamics that preserve stability during cell division. Furthermore, it is interesting to track the dynamics of chromosomes bearing 45S rDNA sites in the cell cycle as well as to observe the expression of FSs with no effect of the mitotic block. We observed variation in both the number and size of 45S FISH signals from the S/G2 phases of interphase and from prophase to anaphase where gaps in 45S rDNA sites also were observed. The change in the degree of condensation of the 45S site begins in the S/G2 phase and appears to be related to the transcriptional demand. Taking into account that the number of 45S rDNA sites tends to be re-established when cells reach telophase, we suggest that the chromatin fiber goes back to the normal condensation level to the anaphase (after segregation), allowing for the approximation of chromosome segments and ensuring dynamics that favor the genomic stab... Mostrar Tudo |
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Palavras-Chave: |
Chromatin fiber; Chromosomal fragments; Fragile site; Gene activity-dependent decondensation; High decondensation. |
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Thesaurus NAL: |
genetic stability. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/170970/1/Cnpgl-2017-GenMolRes-Dynamics.pdf
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Marc: |
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008 2017 bl uuuu u00u1 u #d
024 7 $a10.4238/gmr16019156$2DOI
100 1 $aROCHA, L. C.
245 $aDynamics of 45S rDNA sites in the cell cycle$bfragile sites and chromosomal stability in Lolium and Festuca.$h[electronic resource]
260 $c2017
520 $aAbstract Analyses carried out with fluorescence in situ hybridization (FISH) in C-metaphases of the Lolium-Festuca complex have shown the occurrence of spontaneous fragile sites (FSs) in 45S rDNA regions. FSs are expressed as gaps but they do not result in breaks or chromosomal fragments in these species. These gaps have high DNA condensation observed as thin chromatin fibers that connect the apparent segments of the fragile chromosome, allowing for genomic stability. Assessing the behavior of these regions in the cell cycle of Lolium and Festuca species may lead to a better understanding of the dynamics that preserve stability during cell division. Furthermore, it is interesting to track the dynamics of chromosomes bearing 45S rDNA sites in the cell cycle as well as to observe the expression of FSs with no effect of the mitotic block. We observed variation in both the number and size of 45S FISH signals from the S/G2 phases of interphase and from prophase to anaphase where gaps in 45S rDNA sites also were observed. The change in the degree of condensation of the 45S site begins in the S/G2 phase and appears to be related to the transcriptional demand. Taking into account that the number of 45S rDNA sites tends to be re-established when cells reach telophase, we suggest that the chromatin fiber goes back to the normal condensation level to the anaphase (after segregation), allowing for the approximation of chromosome segments and ensuring dynamics that favor the genomic stability of these species.
650 $agenetic stability
653 $aChromatin fiber
653 $aChromosomal fragments
653 $aFragile site
653 $aGene activity-dependent decondensation
653 $aHigh decondensation
700 1 $aSILVA, G. A.
700 1 $aBUSTAMANTE, F. O.
700 1 $aSILVEIRA, R. A. D.
700 1 $aMITTELMANN, A.
700 1 $aTECHIO, V. H.
773 $tGenetics and Molecular Research$gv. 16, n. 1, 2017.
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