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	Provedor de dados Acta Botanica (2) Genet. Mol. Biol. (1) Autor Moraes,Ana Paula (3) Felix,Leonardo P. (2) Amorim,Felipe W. (1) Batista,Fabiane R. C. (1) Castro,Juliana P. (1) Chase,Mark W. (1) Medeiros-Neto,Enoque (1) Nollet,Felipe (1) Rezende,Luiz (1) Santos,Angeline M. S. (1) Suzigan,João (1) Mais... Palavra-chave Allopolyploidy (1) Asymmetry index (1) Autopolyploidy (1) Base chromosome number (1) CMA/DAPI (1) Chromosome (1) Cytogenetic (1) Dysploidy (1) Evolution (1) Floral traits (1) Heterochromatin (1) Homoploid (1) Hybrid species (1) Karyotype symmetry (1) Pollination (1) Polyploidy (1) RDNA (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2020 (2) 2017 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Karyotype characterization and evolution of chromosome number in Cactaceae with special emphasis on subfamily Cactoideae Acta Botanica Castro,Juliana P.; Moraes,Ana Paula; Chase,Mark W.; Santos,Angeline M. S.; Batista,Fabiane R. C.; Felix,Leonardo P.. ABSTRACT Cactaceae species are karyotypically well-known with x = 11 and chromosome number variation due mainly to polyploidization. However, both assumptions are based on descriptive observations without taking an evolutionary framework of Cactaceae into account. Aiming to confirm these hypotheses in an evolutionary context, we obtained chromosome numbers for 20 species of Cactoideae, performed an extensive review of chromosome number for the family, and analyzed these data using a phylogenetic approach. The karyotypes presented here were characterized by CMA/DAPI banding, and for six species 5S and 45S rDNA sites were located. Our data, along with a survey of the literature, reinforce the long-standing hypothesis of a x = 11 as the base chromosome number... Tipo: Info:eu-repo/semantics/article Palavras-chave: Base chromosome number; CMA/DAPI; Dysploidy; Heterochromatin; Polyploidy; RDNA. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100135 Can plant hybridization and polyploidy lead to pollinator shift? Acta Botanica Rezende,Luiz; Suzigan,João; Amorim,Felipe W.; Moraes,Ana Paula. ABSTRACT Events of both hybridization and polyploidy are capable of completely restructuring the genome, modifying phenotypic traits and affecting ecological interactions. For plants, these changes may affect floral traits that are important for interactions with pollinators, which could lead to shifts in pollinator behavior and taxa between hybrids/polyploids and parental/diploid species. Such pollinator shifts have great ecological and evolutionary relevance since they play a key role in the diversification of angiosperms. There is a growing number of studies that explicitly address the relationship between plant hybridization/polyploidy and pollinator shifts. However, questions remain about how often hybridization and polyploidy lead to pollinator... Tipo: Info:eu-repo/semantics/article Palavras-chave: Allopolyploidy; Autopolyploidy; Floral traits; Hybrid species; Homoploid; Pollination. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000200229 Intrachromosomal karyotype asymmetry in Orchidaceae Genet. Mol. Biol. Medeiros-Neto,Enoque; Nollet,Felipe; Moraes,Ana Paula; Felix,Leonardo P.. Abstract The asymmetry indexes have helped cytotaxonomists to interpret and classify plant karyotypes for species delimitation efforts. However, there is no consensus about the best method to calculate the intrachromosomal asymmetry. The present study aimed to compare different intrachromosomal asymmetry indexes in order to indicate which are more efficient for the estimation of asymmetry in different groups of orchids. Besides, we aimed to compare our results with the Orchidaceae phylogenetic proposal to test the hypothesis of Stebbins (1971). Through a literature review, karyotypes were selected and analyzed comparatively with ideal karyotypes in a cluster analysis. All karyotypes showed some level of interchromosomal asymmetry, ranging from slightly... Tipo: Info:eu-repo/semantics/article Palavras-chave: Asymmetry index; Karyotype symmetry; Chromosome; Cytogenetic; Evolution. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000400610 Registros recuperados: 3 Primeira ... 1 ... Última

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