Data/hora: 04/06/2024 02:11:46

Provedor de dados: | 74
País: | Brazil
Título: | Cytotaxonomy of some species and of interspecific hybrids of Pennisetum (Poaceae, Poales)
Autores: | Techio,Vânia Helena; Davide,Lisete Chamma; Pereira,Antônio Vander; Bearzoti,Eduardo.
Data: | 2002-01-01
Ano: | 2002
Palavras-chave: | Pennisetum; Cytogenetic; Taxonomy; Germplasm; Genetic divergence.
Resumo: | Cytotaxonomic studies were carried out on 26 accessions of Pennisetum spp. originating from the Active Germplasm Bank of Embrapa Gado de Leite-Juiz de Fora, Minas Gerais, Brazil.This study presents cytogenetics and reproductive morphological data for each one of these accessions, which allowed groupings and suggest botanical identifications to be established. The metaphases of the accessions characterized as P. purpureum confirmed the presence of 2n = 28 chromosomes that have already been described for this species. For the hybrids between P. purpureum and P. glaucum and for the hexaploids, resulting from the chromosome duplication of these hybrids, 2n = 21 and 2n = 42 chromosomes were confirmed, respectively. The wild accession identified as P. setosum showed metaphases with 2n = 54 chromosomes, while those characterized as P. nervosum had cells with 2n = 36 chromosomes. The wild accession 15 was different from the others for the morphological characters, with 2n = 36 chromosomes, and was classified as P. orientale. Two statistical procedures were used (canonical variables and cluster analysis on the basis of the Mahalanobis distance), and the results confirmed the conclusions obtained from the cytogenetic and morphologic analysis.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200014
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572002000200014
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.25 n.2 2002
Fonte: | info:eu-repo/semantics/openAccess