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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
15/08/2024 |
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Data da última atualização: |
15/08/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SEREJO, J. A. dos S.; AGUIAR-PERECIN, M. L. R. |
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Afiliação: |
JANAY ALMEIDA DOS SANTOS SEREJO, CNPMF; MARGARIDA L. R. AGUIAR-PERECIN, UNIVERSITY OF SÃO PAULO. |
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Título: |
Breakage-fusion-bridge cycles and de novo telomere formation on broken chromosomes in maize callus cultures. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Genome, v.59, n. 6, p.367-78. Jun, 2016. |
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ISSN: |
1088-9051 |
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DOI: |
10.1139/gen-2015-0211 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract Breakpoints involved in chromosome alterations associated with heterochromatin have been detected in maize plants regenerated from callus culture. A cytogenetic analysis of plants regenerated from a maize callus was performed aiming to analyze the stability of a chromosome 7 bearing a deficiency-duplication (Df-Dp), which was interpreted as derived from a chromatid type breakage-fusion-bridge (BFB) cycle. The Df-Dp chromosome 7 was stable in mitotic and meiotic cells of the regenerated plants. Fluorescence in situ hybridization showed signals of telomeric sequences on the broken chromosome arm and provided evidence of de novo telomere formation. The stability of two types of altered chromosome 7 was investigated in C-banded metaphases from samples of the original callus that were collected during a period of 30-42 months after culture initiation. New alterations involving heterochromatic knobs of chromosomes 7 and 9 were observed. The aberrant chromosomes were stable in the subcultures, thus providing evidence of broken chromosome healing. The examination of anaphases showed the presence of bridges, which was consistent with the occurrence of BFB cycles. De novo telomere formation occurred in euchromatic and heterochromatic chromosome termini. The results point to events of chromosomal evolution that might occur in plants. |
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Thesagro: |
Hibridação; Milho. |
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Thesaurus Nal: |
Callus culture; Fluorescence in situ hybridization; Heterochromatin. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02030naa a2200217 a 4500
001 2166562
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008 2016 bl uuuu u00u1 u #d
022 $a1088-9051
024 7 $a10.1139/gen-2015-0211$2DOI
100 1 $aSEREJO, J. A. dos S.
245 $aBreakage-fusion-bridge cycles and de novo telomere formation on broken chromosomes in maize callus cultures.$h[electronic resource]
260 $c2016
520 $aAbstract Breakpoints involved in chromosome alterations associated with heterochromatin have been detected in maize plants regenerated from callus culture. A cytogenetic analysis of plants regenerated from a maize callus was performed aiming to analyze the stability of a chromosome 7 bearing a deficiency-duplication (Df-Dp), which was interpreted as derived from a chromatid type breakage-fusion-bridge (BFB) cycle. The Df-Dp chromosome 7 was stable in mitotic and meiotic cells of the regenerated plants. Fluorescence in situ hybridization showed signals of telomeric sequences on the broken chromosome arm and provided evidence of de novo telomere formation. The stability of two types of altered chromosome 7 was investigated in C-banded metaphases from samples of the original callus that were collected during a period of 30-42 months after culture initiation. New alterations involving heterochromatic knobs of chromosomes 7 and 9 were observed. The aberrant chromosomes were stable in the subcultures, thus providing evidence of broken chromosome healing. The examination of anaphases showed the presence of bridges, which was consistent with the occurrence of BFB cycles. De novo telomere formation occurred in euchromatic and heterochromatic chromosome termini. The results point to events of chromosomal evolution that might occur in plants.
650 $aCallus culture
650 $aFluorescence in situ hybridization
650 $aHeterochromatin
650 $aHibridação
650 $aMilho
700 1 $aAGUIAR-PERECIN, M. L. R.
773 $tGenome$gv.59, n. 6, p.367-78. Jun, 2016.
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| 2. |  | QUEIROZ, J. S.; FANCELLI, M.; COELHO FILHO, M. A.; LEDO, C. A. da S.; SÁNCHES, C. G. New type of trap for monitoring banana weevil population. African Journal of Agricultural Research, v.12, n.10, p. 764-770, march, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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