Data/hora: 08/06/2024 17:12:05

Provedor de dados: | 74
País: | Brazil
Título: | Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
Autores: | Mendes-Bonato,Andréa Beatriz; Pagliarini,Maria Suely; Valle,Cacilda Borges do.
Data: | 2006-01-01
Ano: | 2006
Palavras-chave: | Brachiaria; Interspecific hybrid; Meiosis; Spindle abnormality; Tropical grass.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100023
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572006000100023
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.29 n.1 2006
Fonte: | info:eu-repo/semantics/openAccess