Por favor, use este identificador para citar o enlazar este ítem: http://www.alice.cnptia.embrapa.br/alice/handle/doc/132531
Título: Cytogenetics and cytotaxonomy of Velloziaceae.
Autor: MELO, N. F. de
GUERRA, M.
BENKO-ISEPPON, A. M.
MENEZES, N. L. de
Afiliación: NATONIEL FRANKLIN DE MELO, CPATSA
MARCELO GUERRA, UNIVERSIDADE FEDERAL DE PERNAMBUCO
ANA MARIA BENKO-ISEPPON, UNIVERSIDADE FEDERAL DE PERNAMBUCO
NANUZA LUIZA DE MENEZES, UNIVERSIDADE DE SÃO PAULO.
Año: 1997
Referencia: Plant Systematics and Evolution, v. 204, p. 257-273, 1997.
Descripción: Chromosome number and other cytological features are reported from 35 species of Velloziaceae, including several african and brazilian populations. All analyzed species show areticulate interphase nuclei and prophase/prometaphase chromosomes with proximal early condensation. Most heteropycnotic blocks do not seem to correspond to heterochromatin since, at least in Vellozia patens, they do not stain differentially after C-banding procedures. Regarding the chromosome number, three main groups could be identified. The first comprised diploid species of the genera Nanuza, Vellozia and the brazilian species of Xerophyta with 2n=14 or 16; the second comprised tetraploid species with 2n=34, and included all brazilian species of subfam. Barbacenioideae; the third group, of hexaploid species, comprised the African representatives of the genus Xerophyta. A single population of Vellozia, possibly of hybrid origin, had 2n~=32. A basic number of x=8 is proposed for the family. The karyological information supports the hypothesis that the Velloziaceae originated on the South American, rather than on the African continent.
Thesagro: Citotaxonomia
Cromossoma
NAL Thesaurus: Velloziaceae
chromosomes
Palabras clave: Cytotaxonomy
Heterochromation
Tipo de Material: Artigo de periódico
Acceso: openAccess
Aparece en las colecciones:Artigo em periódico indexado (CPATSA)

Ficheros en este ítem:
Fichero Descripción TamañoFormato 
Separata8366.pdf11.25 MBAdobe PDFVista previa
Visualizar/Abrir

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace