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	Provedor de dados Genet. Mol. Biol. (2) Autor Guerra,Marcelo (1) Lavia,Graciela I. (1) Marques,André (1) Roa,Fernando (1) Robledo,Germán (1) Seijo,Guillermo (1) Mais... Palavra-chave CMA/DAPI bands (2) Cytotaxonomy (1) Genome donors (1) Meiosis (1) Peanut genetic origin (1) RDNA loci (1) RDNA sites (1) Tripogandra (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2010 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Genome re-assignment of Arachis trinitensis (Sect. Arachis, Leguminosae) and its implications for the genetic origin of cultivated peanut Genet. Mol. Biol. Robledo,Germán; Lavia,Graciela I.; Seijo,Guillermo. The karyotype structure of Arachis trinitensis was studied by conventional Feulgen staining, CMA/DAPI banding and rDNA loci detection by fluorescence in situ hybridization (FISH) in order to establish its genome status and test the hypothesis that this species is a genome donor of cultivated peanut. Conventional staining revealed that the karyotype lacked the small "A chromosomes" characteristic of the A genome. In agreement with this, chromosomal banding showed that none of the chromosomes had the large centromeric bands expected for A chromosomes. FISH revealed one pair each of 5S and 45S rDNA loci, located in different medium-sized metacentric chromosomes. Collectively, these results suggest that A. trinitensis should be removed from the A genome and be... Tipo: Info:eu-repo/semantics/article Palavras-chave: CMA/DAPI bands; Genome donors; Peanut genetic origin; RDNA loci. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400018 Karyotype differentiation in three species of Tripogandra Raf. (Commelinaceae) with different ploidy levels Genet. Mol. Biol. Marques,André; Roa,Fernando; Guerra,Marcelo. Most species of the genus Tripogandra (Commelinaceae) are taxonomically poorly circumscribed, in spite of having a relatively stable basic number x = 8. Aiming to estimate the cytological variation among Tripogandra species carrying this base number, several structural karyotypic characters were investigated in the diploid T. glandulosa, the hexaploid T. serrulata, and the octoploid T. diuretica. A careful evaluation of chromosome size and morphology did not reveal clear chromosome homeologies among karyotypes. The mean chromosome size was strongly reduced in the octoploid species, but not in the hexaploid species. They also differed largely in the CMA+ banding pattern and in the number of 5S and 45S rDNA sites per monoploid chromosome complement. All... Tipo: Info:eu-repo/semantics/article Palavras-chave: Tripogandra; Cytotaxonomy; RDNA sites; CMA/DAPI bands; Meiosis. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400020 Registros recuperados: 2 Primeira ... 1 ... Última

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