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dc.contributor.authorMELO, N. F. de
dc.contributor.authorGUERRA, M.
dc.contributor.authorBENKO-ISEPPON, A. M.
dc.contributor.authorMENEZES, N. L. de
dc.date.accessioned2018-05-01T01:03:30Z-
dc.date.available2018-05-01T01:03:30Z-
dc.date.created1997-08-27
dc.date.issued1997
dc.identifier.citationPlant Systematics and Evolution, v. 204, p. 257-273, 1997.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/132531-
dc.descriptionChromosome 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.
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectCytotaxonomy
dc.subjectHeterochromation
dc.titleCytogenetics and cytotaxonomy of Velloziaceae.
dc.typeArtigo de periódico
dc.date.updated2018-05-01T01:03:30Zpt_BR
dc.subject.thesagroCitotaxonomia
dc.subject.thesagroCromossoma
dc.subject.nalthesaurusVelloziaceae
dc.subject.nalthesauruschromosomes
riaa.ainfo.id132531
riaa.ainfo.lastupdate2018-04-30
dc.contributor.institutionNATONIEL FRANKLIN DE MELO, CPATSA
dc.contributor.institutionMARCELO GUERRA, UNIVERSIDADE FEDERAL DE PERNAMBUCOeng
dc.contributor.institutionANA MARIA BENKO-ISEPPON, UNIVERSIDADE FEDERAL DE PERNAMBUCOeng
dc.contributor.institutionNANUZA LUIZA DE MENEZES, UNIVERSIDADE DE SÃO PAULO.eng
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