Data/hora: 08/06/2024 18:00:49

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