Chromosome number and microsporogenesis in Paspalum maritimum (caespitosa group; gramineae)

• Autor(a) principal: Adamowski,Eleniza de Victor
• Data de Publicação: 2000
• Outros Autores: Pagliarini,Maria Suely, Batista,Luiz Alberto Rocha
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Archives of Biology and Technology
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300009
• topic: Paspalum maritimum; Chromosome number; Meiotic behavior; Pollen fertility

Despite of economic importance of the genus Paspalum, little or no cytologic information is available for many species. This is the first report about chromosome number and meiotic behavior for P. maritimum. The three accessions collected in Amapá State (North Region of Brazil) were tetraploid (2n=4x=40) with the chromosomes associating predominantly as bivalents. The low frequency of multivalents suggested that they were segmental allotetraploids. All accessions showed a low rate of meiotic irregularities, and as a consequence the pollen fertility was high. The results suggested that these accessions presented potential for use in a hybridization program.