Chromosome number in Pennisetum spp. accessions (Poaceae, Poales) - DOI: 10.4025/actascibiolsci.v30i3.5016

• Autor(a) principal: Techio, Vânia Helena
• Data de Publicação: 2008
• Outros Autores: Davide, Lisete Chamma, Souza, Tatiana Matioli, Pereira, Antônio Vander
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum Biological Sciences
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5016
• topic: Pennisetum; cytogenetics; germplasm; interspecific hybrids; Pennisetum; citogenética; germoplasma; híbridos interespecíficos.

The chromosome complement of 16 Pennisetum accessions belonging to the Germplasm Collection of Embrapa Gado de Leite - Juiz de Fora, Minas Gerais State was evaluated. The cytogenetic analysis employed the smear technique and staining with Feulgen. In four accessions, metaphases with 2n = 28 chromosomes were obtained, confirming their classification as P. purpureum. The hybrid origin P. purpureum x P. glaucum was observed in eight accessions, which presented 2n = 21. In an accession identified as P. purpureum x P. glaucum hybrid, metaphases with 2n = 54 were observed, suggesting that it is not a triploid interspecific hybrid. For three other evaluated accessions, cells with 2n=54 were also observed, although they were identified as hybrids between P. purpureum x wild species; P. glaucum polycross x hexaploid 200 and P. glaucum x [F92-161-01 (P. purpureum x P. glaucum)].