Karyotypic Variation
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Cytogenetic variation of repetitive DNA elements in Hoplias malabaricus (Characiformes - Erythrinidae) from white, black and clear water rivers of the Amazon basin
Abstract Hoplias malabaricus is a common fish species occurring in white, black and clear water rivers of the Amazon basin. Its large distribution across distinct aquatic environments can pose stressful conditions for dispersal and creates possibilities for the emergence of local adaptive profiles. We investigated the chromosomal localization of repetitive D
Genet. Mol. Biol.. Publicado em: 2016-03
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2. Karyotype and genome size analyses in species of Helichrysum (Asteraceae)
Karyotype studies were performed in 18 populations of eight Helichrysum species in Iran. Those species showed chromosome numbers of 2n = 2x = 14; 2n = 4x = 24, 28 and 32; 2n = 6x = 36; 2n = 7x = 42; 2n = 8x = 48; 2n = 9x = 54; and 2n = 10x = 60. The chromosome numbers of H. davisianum, H. globiferum, H. leucocephalum and H. oocephalum are reported here for t
Acta Bot. Bras.. Publicado em: 2014-09
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3. Estudo citogenético em duas espécies da família Callichthyidae (Callichthyinae, Siluriformes) da bacia do Rio de Contas/Bahia
The family Callichthyidae is included in the order Siluriformes, is widely distributed by the Neotropical region and comprises 194 species and eight genera, distributed in two subfamilies, Corydoradinae and Callichthyinae. Aiming to expand the cytogenetics information of the ichthyofauna of the eastern Atlantic basins, this work was done in Callichthys calli
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/02/2011
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4. Análise da variação cariotípica e dos mecanismos de recombinação em leveduras industriais (Saccharomyces cerevisiae) durante o processo de fermentação alcoólica / Analysis of the karyotypic variation and the recombination mechanisms industrial yeast (Saccharomyces cerevisiae) during the alcoholic fermentation process
Brazilian sugar cane ethanol stands out among the energetic alternatives available nowadays. In the fermentation process to produce ethanol it is used the yeast Saccharomyces cerevisiae. One of the most widely adopted strains is the industrial isolate PE-2, currently used by ~30% of Brazilian distilleries, generating ~10% of the worlds ethanol supply. This
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2010
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5. Karyotype differentiation in three species of Tripogandra Raf. (Commelinaceae) with different ploidy levels
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. ser
Genetics and Molecular Biology. Publicado em: 15/10/2010
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6. Caracterização citogenética de populações alopátricas do gênero Hoplias (Characiformes, Erythrinidae), com enfoque nos grupos malabaricus e lacerdae
Erythrinidae represents a relatively small family of Neotropical fish, presenting a great geographical distribution. It is composed only by three genera, Hoplias, Hoplerythrinus and Erythrinus. The genus Hoplias is most widespread in the South American continent. Two great groups, H. malabaricus and H. lacerdae are described for the Southeast Brazil, showing
Publicado em: 2010
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7. The karyotype of Nothoscordum arenarium Herter (Gilliesioideae, Alliaceae) : a populational and cytomolecular analysis
The genus Nothoscordum Kunth comprises approximately 20 species native to South America. Karyologically, the genus is remarkable for its large chromosomes and Robertsonian translocations. Variation in chromosome number has been recorded in a few polyploid species and it is unknown among diploids. This study presents the chromosome number and morphology of 53
Publicado em: 2010
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8. Karyotypic variation and geographic distribution of Anopheles campestris-like (Diptera: Culicidae) in Thailand
Seventy-one isolines of Anopheles campestris-like were established from wild-caught females collected from human-biting and animal-biting traps at 12 locations in Thailand. All isolines had an average branch summation of seta 2-VI pupal skins ranging from 20.3-30.0 branches, which is in the range of An. campestris (17-58 branches). They showed three differen
Memórias do Instituto Oswaldo Cruz. Publicado em: 2009-07
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9. The karyotype of Nothoscordum arenarium Herter (Gilliesioideae, Alliaceae): a populational and cytomolecular analysis
The genus Nothoscordum Kunth comprises approximately 20 species native to South America. Karyologically, the genus is remarkable for its large chromosomes and Robertsonian translocations. Variation in chromosome number has been recorded in a few polyploid species and it is unknown among diploids. This study presents the chromosome number and morphology of 53
Genetics and Molecular Biology. Publicado em: 23/01/2009
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10. Estudo citogenetico e das relações filogeneticas de Engystomops petersi e Engystomops sp. (Anura, Leiuperidae) / Cytogenetics and phylogenetics studies of Engystomops petersi and Engystomops sp. (Anura, Leiuperidae)
The frog Engystomops petersi is widely distributed in the Amazon basin. Genetic divergence and speciation mechanisms of E. petersi populations have been inferred mainly from mitochondria DNA (mtDNA) and microsatellite polymorphisms, male advertisement call and sexual selection. In spite of the significant progress resulting from these studies, many cytogenet
Publicado em: 2009
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11. Estudos de citogenética e de filogenia molecular em roedores da tribo Akodontini / Cytogenetics and molecular phylogenetics in rodents of the tribe Akodontini
Traditionally comparative cytogenetic studies are based mainly on banding patterns. Nevertheless, when dealing with species with highly rearranged genomes, as in Akodon species, or with other highly divergent species, cytogenetic comparisons of banding patterns prove to be inadequate. Hence, comparative chromosome painting has become the method of choice for
Publicado em: 2009
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12. Karyotype characterization and nucleolar organizer regions of marsupial species (Didelphidae) from areas of Cerrado and Atlantic Forest in Brazil
The karyotypes of 23 specimens belonging to 16 species from nine genera of Brazilian marsupials (family Didelphidae) were studied. The animals were collected in eight localities of Cerrado or Atlantic Forest biomes in the states of Goiás, Tocantins and São Paulo. The karyotypes were analyzed after conventional Giemsa staining and silver staining of the nu
Genetics and Molecular Biology. Publicado em: 31/10/2008