Satellite Dna
Mostrando 1-12 de 431 artigos, teses e dissertações.
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1. Cytogenetics and DNA barcode reveal an undescribed Apareiodon species (Characiformes: Parodontidae)
Abstract Parodontidae is a small group of fish and some species are particularly difficult to identify due to the lack of sufficiently consistent morphological traits. Cytogenetically, the species possess 2n = 54 chromosomes and are either sex-homomorphic or sex-heteromorphic (regarding its chromosomes). We evaluated data on color, tooth morphology, cytogene
Genet. Mol. Biol.. Publicado em: 27/06/2019
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2. Trypanosoma cruzi strain TcIV infects raccoons from Illinois
BACKGROUND The northern limits of Trypanosoma cruzi across the territory of the United States remain unknown. The known vectors Triatoma sanguisuga and T. lecticularia find their northernmost limits in Illinois; yet, earlier screenings of those insects did not reveal the presence of the pathogen, which has not been reported in vectors or reservoir hosts in
Mem. Inst. Oswaldo Cruz. Publicado em: 2018-01
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3. Evolution of satellite DNA sequences in two tribes of Bovidae: A cautionary tale
Abstract Two clones, Bt1 from Bos taurus and Om1 from Ovis orientalis musimon, were used as probes for hybridization on genomic DNA and on metaphase chromosomes in members of Bovini and Caprini tribes. Bt1 and Om1 are sequences respectively belonging to the 1.715 and 1.714 DNA satellite I families. Southern blots and fluorescence in situ hybridization experi
Genet. Mol. Biol.. Publicado em: 24/11/2015
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4. Citogenética comparativa em espécies de Hypostomus (Siluriformes, Loricariidae, Hypostominae) : contribuição da fração repetitiva do genoma para a diversidade cromossômica do grupo
Hypostomus is the widest genus of the armored catfishes in South America. This group presents a great diversity in color pattern and morphology, and shows not conservative chromosomal features. Different classes of repetitive DNAs have distinct evolutionary dynamics in the genome of eukaryotes. Therefore, analyses and distribution of these sequences in chrom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/11/2012
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5. Sex chromosome system ZZ/ZW in Apareiodon hasemani Eigenmann, 1916 (Characiformes, Parodontidae) and a derived chromosomal region
Parodontidae fish show few morphological characteristics for the identification of their representatives and chromosomal analyses have provided reliable features for determining the interrelationships in this family. In this study, the chromosomes of Apareiodon hasemani from the São Francisco River basin, Brazil, were analyzed and showed a karyotype with 2n
Genet. Mol. Biol.. Publicado em: 13/11/2012
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6. Isolation, characterization and chromosomal localization of repetitive DNA sequences in Physalaemus ephippifer (Anura Leiuperidae) / Isolamento, caracterização e localização cromossômica de sequências de DNA repetitivo de Physalaemus ephippifer (Anura Leiuperidae)
Previous cytogenetic studies of Physalaemus ephippifer, a species currently allocated to the group P. cuvieri, showed an interesting female-specific chromosome heteromorphism. In 14 females of P. ephippifer, chromosome pair 8 was heteromorphic with regard to the occurrence of an NOR anda terminal C-band. Such heteromorphism was not found in the seven analyze
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/03/2010
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7. Microsatellite characterization of Cimarron Uruguayo dogs
Various genetic markers, including microsatellites, have been used to analyze the genetic polymorphism and heterozygosity in canine breeds. In this work, we used nine microsatellite markers to investigate the genetic variability in Cimarron Uruguayo dogs, the only officially recognized native canine breed in Uruguay. DNA from 30 Cimarron Uruguayo dogs from n
Genetics and Molecular Biology. Publicado em: 26/11/2010
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8. Estudo citogenético e pesquisa de mutações nos genes JAK2 e MPL em Policitemia vera, Mielofibrose primária e Trombocitemia essencial / Cytogenetic study and search for mutations in JAK2 and MPL genes in Polycythemia vera, Primary myelofibrosis and Essential thrombocythemia
Objetivos: Descrever as alteracoes cromossomicas em policitemia vera (PV), trombocitemia essencial (TE) e mielofibrose primaria (MF). Verificar se a taxa de anormalidades cromossomicas e ampliada pela FISH nos casos com cariotipo normal e ausencia de metafases. Detectar a incidencia da mutacao JAK2 V617F em PV, TE e MF; de mutacoes no exon 12 do JAK2 em PV e
Publicado em: 2010
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9. Astyanax hastatus Myers, 1928 (Teleostei, Characidae): a new species complex within the genus Astyanax?
Four populations of Astyanax hastatus Myers 1928 from the Guapimirim River basin (Rio de Janeiro State) were analyzed and three distinct cytotypes identified. These cytotypes presented 2n = 50 chromosomes, with 4M+8SM+10ST+28A (Cytotype A), 8M+10SM+14ST+18A (Cytotype B), 6M+8SM+4ST+32A (Cytotype C) and scanty heterochromatin, mainly located throughout perice
Genetics and Molecular Biology. Publicado em: 03/07/2009
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10. Hidden heterochromatin: characterization in the Rodentia species Cricetus cricetus, Peromyscus eremicus (Cricetidae) and Praomys tullbergi (Muridae)
The use of in situ restriction endonuclease (RE) (which cleaves DNA at specific sequences) digestion has proven to be a useful technique in improving the dissection of constitutive heterochromatin (CH), and in the understanding of the CH evolution in different genomes. In the present work we describe in detail the CH of the three Rodentia species, Cricetus c
Genetics and Molecular Biology. Publicado em: 2009
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11. Análise citogenética de espécies de Astyanax (Characiformes) da região de transposição do rio Piumhi
The transposition of the Piumhi River caused the introduction of many aquatic species in the São Francisco basin. Species previously restricted to the Upper Paraná basin, such as Leporinus octofasciatus and Parodon nasus, are now present in the São Francisco basin. However, the morphological identification of the invaders is not always possible. This beco
Publicado em: 2009
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12. Citogenética clássica e molecular em peixes neotropicais. Estudos comparativos entre bacias hidrográficas com ênfase em região de transposição de rio
Basic and molecular cytogenetic studies were carried out in a few fish species from family Parodontidae: Apareiodon ibitiensis, A. piracicabae, A. affinis, A. vladii, Apareiodon sp. Parodon nasus and Parodon hilarii. All were collected in distinct hydrographic basins, with emphasis in a river transposition area, more specifically of the Piumhi River. Apareio
Publicado em: 2009