| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
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| Autores: |
Mendes-Bonato,Andréa Beatriz
Pagliarini,Maria Suely
Valle,Cacilda Borges do
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| Data: |
2006-01-01
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| Ano: |
2006
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| Palavras-chave: |
Brachiaria
Interspecific hybrid
Meiosis
Spindle abnormality
Tropical grass
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| Resumo: |
This paper reports a case of abnormal spindle orientation during microsporogenesis in an interspecific hybrid of the tropical grass Brachiaria. In the affected plant, prophase I was normal. In metaphase I, bivalents were regularly co-oriented but distantly positioned and spread over the equatorial plate. In anaphase I, chromosomes failed to converge into focused poles due to parallel spindle fibers. As a consequence, in telophase I, an elongated nucleus or several micronuclei were observed in each pole. In the second division, the behavior was the same, leading to polyads with several micronuclei. A total of 40% of meiotic products were affected. The use of this hybrid in production systems needing good-quality seeds is discussed.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100023
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572006000100023
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.29 n.1 2006
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| Direitos: |
info:eu-repo/semantics/openAccess
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