Constitutive Heterochromatin Ch
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Chromosomal diversification of diploid number, heterochromatin and rDNAs in two species of Phanaeus beetles (Scarabaeidae, Scarabaeinae)
The genus Phanaeus is included in the tribe Phanaeini, one of the most diverse tribes within the subfamily Scarabaeinae in terms of chromosomal characteristics. However, so far the species of this genus were not studied with differential cytogenetic techniques, limiting any inference of the probable mechanisms responsible for this diversity. In this work, se
Genet. Mol. Biol.. Publicado em: 16/08/2013
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2. Comparative cytogenetic analysis of two grasshopper species of the tribe Abracrini (Ommatolampinae, Acrididae)
The grasshopper species Orthoscapheus rufipes and Eujivarus fusiformis were analyzed using several cytogenetic techniques. The karyotype of O. rufipes, described here for the first time, had a diploid number of 2n = 23, whereas E. fusiformis had a karyotype with 2n = 21. The two species showed the same mechanism of sex determination (XO type) but differed in
Genetics and Molecular Biology. Publicado em: 2011
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3. Comparative cytogenetic analysis between Lonchorhina aurita and Trachops cirrhosus (Chiroptera, Phyllostomidae)
Phyllostomidae comprises the most diverse family of neotropical bats, its wide range of morphological features leading to uncertainty regarding phylogenetic relationships. Seeing that cytogenetics is one of the fields capable of providing support for currently adopted classifications through the use of several markers, a comparative analysis between two Phyl
Genetics and Molecular Biology. Publicado em: 06/11/2009
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4. Comparative cytogenetics of three species of Dichotomius (Coleoptera, Scarabaeidae)
Meiotic and mitotic chromosomes of Dichotomius nisus, D. semisquamosus and D. sericeus were analyzed after conventional staining, C-banding and silver nitrate staining. In addition, Dichotomius nisus and D. semisquamosus chromosomes were also analyzed after fluorescent in situ hybridization (FISH) with an rDNA probe. The species analyzed had an asymmetrical
Genetics and Molecular Biology. Publicado em: 01/05/2009
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5. 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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6. AnÃlise cariotÃpica, heterocromatina constitutiva e frequÃncia de expressÃo das RONs em duas espÃcies de Melanoplinae (Orthoptera: Acrididae)
A subfamÃlia Melanoplinae constitui um grupo de gafanhotos com a maior diversidade cariotÃpica dentro de Acrididae. O objetivo principal deste trabalho foi estudar cromossomos meiÃticos dos melanoplÃneos Baeacris punctulatus e Dichroplus fuscus atravÃs de diferentes tÃcnicas citogenÃticas. Baeacris punctulatus e D. fuscus apresentaram os cariÃtipos 2
Publicado em: 2009
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7. Karyotype, C-and fluorescence banding pattern, NOR location and FISH study of five Scarabaeidae (Coleoptera) species
Meiotic chromosomes obtained from members of the coleopteran subfamilies Rutelinae and Dynastinae were studied using standard and silver nitrate staining, C-banding, base-specific fluorochromes and fluorescent in situ hybridization (FISH). The study presents detailed karyotipic descripitions of three Rutelinae species (Geniates borelli, Macraspis festiva and
Genetics and Molecular Biology. Publicado em: 2005-09
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8. AnÃlise citogenÃtica comparativa em gafanhotos das famÃlias acrididae e romaleidae atravÃs de tÃcnicas convencionais e moleculares
A comparative cytogenetic analysis was performed between the romaleid species Chromacris nuptialis and C. speciosa in order to detect possible chromosomic markers through C banding, silver nitrate staining, base-especific fluorochromes (CMA3 and DAPI) and FISH using a 45S rDNA probe. Both species have the same karyotype number, 2n=23,X0 and acrocentric chrom
Publicado em: 2005