Karyotypic Differences
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. 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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14. Identification of distinct evolutionary units in allopatric populations of Hypostomus cf. wuchereri Günther, 1864 (Siluriformes: Loricariidae): karyotypic evidence
Few chromosomal reports are available for the endemic fish fauna from coastal basins in northeastern Brazil, and regional biodiversity remains partially or completely unknown. This is particularly true for Loricariidae, the most diverse family of armored catfishes. In the present work, allopatric populations of Hypostomus cf. wuchereri (Siluriformes: Loricar
Neotropical Ichthyology. Publicado em: 2011-06
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15. CitogenÃtica em peixes de cabeceiras de dois riachos pertencentes à bacia do Alto rio ParanÃ, regiÃo de Toledo (PR) / Cytogenetic in fishes from two headwaters streams belonging to the Upper Paranà river basin, Toledo (PR)
Cytogenetics studies were carried out in two genera of fishes from Pindorama and Lopei streams, Upper Paranà River basin, with cytossistematic and ecologic-evolutionary approaches. In Heptapterus mustelinus, the first cytogenetics characterization in the genus was carried out, verifying 54 chromosomes (26m+18sm+4st+6a), which is a diploid number not observe
Publicado em: 2011
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16. Comparative karyotypic analysis in the Alstroemeria hookeri Lodd. (Alstroemeriaceae) complex sensu Bayer (1987)
Alstroemeria L. (Alstroemeriaceae) is an American genus of monocots with two principal distribution centers in Chile and Brazil. In Chile, it is represented by about 32 species, most of them in central Chile, an area known for its high level of endemism. The "complex" Alstroemeria hookeri is endemic to Chile, where it is distributed from the Coquimbo to the
Genetics and Molecular Biology. Publicado em: 26/02/2010
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17. 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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18. 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
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19. Comparative cytogenetics among species of the Astyanax scabripinnis complex: evolutionary and biogeographical inferences
Karyotype data are presented for distinct species of the genus Astyanax from four rivers belonging to three different hydrographic basins of the State of Paraná, Brazil (Verde River - Tibagi basin, Açungui River - Ribeira basin, and Santo Antônio and Jaguariaíva Rivers - Jaguariaíva basin). Three karyotypic forms were identified, here denominated karyot
Genetics and Molecular Biology. Publicado em: 2008
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20. Análise citogenética em algumas espécies de peixes em uma região de divisor de águas entre riachos de bacias hidrográficas distintas
Cytogenetics studies in headwaters fishes have contributed significantly to the citotaxonomy and cytossistematic of these organisms. However, little is known about this diversity in the vast majority of river basins, especially among populations of adjacent basin headwaters, as it occurs in the Corumbataí area of environmental protection (Área de Proteçã
Publicado em: 2008
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21. Cytogenetic markers as diagnoses in the identification of the hybrid between Piauçu (Leporinus macrocephalus) and Piapara (Leporinus elongatus)
The genetic monitoring of interspecific hybrids involves the application of methodologies able to provide an easy and indubitable genetic characterization of both parental and hybrid individuals. In the present work, cytogenetic techniques were used to identify a hybrid lineage of "Piaupara" in order to caracterize them in relation to the parental species, L
Genetics and Molecular Biology. Publicado em: 2008
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22. Chromosome divergence and NOR polymorphism in Bryconamericus aff. iheringii (Teleostei, Characidae) in the hydrographic systems of the Paranapanema and Ivaí Rivers, Paraná, Brazil
Cytogenetic studies were carried out in three populations of Bryconamericus aff. iheringii from two hydrographic systems of the Paranapanema and Ivaí Rivers, separated by a watershed, both belonging to the upper Paraná River basin. Specimens had a constant diploid number 2n = 52 chromosomes. However, three karyotype formulae were identified in the three po
Genetics and Molecular Biology. Publicado em: 2008
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23. Citotaxonomia molecular do gÃnero Callisia Loefl. (Commelinaceae)
The genus Callisia displays a remarkable diversity in chromosomal number and morphology within and between its sections. In addition, phylogenetic analyses suggest that it is not monophyletic, and some of its species could be more related to Tripogandra. Aiming to investigate the karyotypic evolution of the genus and understand its relationship with Tripogan
Publicado em: 2007
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24. Diversidade de peixes residentes em cabeceiras de rios. Uma abordagem cromossômica em três diferentes biomas aquáticos da Região Sul do Brasil.
This study presented cytogenetic analysis of small fishes species collected in the headwaters of Jaguariaíva, Ribeira and, Tibagi rivers. Some of these species have had a comparative cytogenetic population analysis among different basins, while in the others were observed inherent specific problems only in one population. In this work we boarded cytogenetic
Publicado em: 2006