Data/hora: 04/06/2024 16:40:11

Provedor de dados: 	65	
País: 	Brazil	
Título: 	Meiotic analysis of the germoplasm of three medicinal species from Asteraceae family	
Autores: 	Olkoski,Denise; Laughinghouse,Haywood Dail; Silva,Antonio Carlos Ferreira da; Tedesco,Solange Bosio.	
Data: 	2008-09-01	
Ano: 	2008	
Palavras-chave: 	Asteraceae; Meiotic behavior; Pollen viability.	
Resumo: 	Cytogenetic characterization was carried out on 12 accessions from Aster squamatus (Spreng.) Hieron., Pterocaulon polystachyum DC, and Solidago microglossa DC by studying their meiotic behavior and pollen viability. These species are from the Asteraceae family, native to Rio Grande do Sul State, Brazil, and are important for medicinal use. Young inflorescences with four accessions of each species were collected, fixed in ethanol-acetic acid (3:1), and conserved in ethanol 70% until use. The method used was that of squashing the anthers and coloring with acetic orcein 2%. Meiosis was regular in all accessions, presenting chromosomal associations preferentially bivalent, where n=10 was found for Aster squamatus and n=9 for Pterocaulon polystachyum, and Solidago microglossa. The studied accessions presented a Meiotic Index (MI) that varied from 65% to 87% in Aster squamatus, 85% to 92% in Pterocaulon polystachyum, and 64% to 92% in Solidago microglossa, indicating meiotic stability, although irregularities appeared during the cellular division. The pollen viability estimative was high in all studied accessions. These results indicate that the studied species can be included in future studies of genetic breeding.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000600047	
Editor: 	Universidade Federal de Santa Maria	
Relação: 	10.1590/S0103-84782008000600047	
Formato: 	text/html	
Fonte: 	Ciência Rural  v.38 n.6 2008	
Fonte: 	info:eu-repo/semantics/openAccess