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Registros recuperados: 20
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A "G" chromosome banding study of three cupped oyster species : Crassostrea gigas, Crassostrea angulata and Crassostrea virginica (Mollusca : Bivalvia) ArchiMer
Leitao, Alexandra; Thiriot-quievreux, Catherine; Malheiro, Isabel; Boudry, Pierre.
The G-banding technique was performed on chromosomes from gill tissue of three cupped oyster species : Crassostrea gigas, Crassostrea angulata and Crassostrea virginica. Identification of the ten individual chromosome pairs was obtained. Comparative analysis of G-banded karyotypes of the three species showed that their banding patterns generally resembled each other, with chromosome pair 3 being similar in all three species. However, differences from one species to another were also observed. The G-banding pattern highlighted greater similarities between C. gigas and C. angulata than between these two species and C. virginica, thus providing an additional argument for genetic divergence between, these two evolutionary lineages. C. gigas and C. angulata...
Tipo: Text Palavras-chave: Crassostrea virginica; Crassostrea angulata; Crassostrea gigas; G banding; Chromosome.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/publication-2736.pdf
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A new karyotype of Calomys (Rodentia, Sigmodontinae) Iheringia, Sér. Zool.
Lima,J. Fernando de S.; Kasahara,Sanae.
The genus Calomys Waterhouse, 1837 is widely distributed within South America, being found in Venezuela, Colombia, Peru, Bolivia, Brazil, Paraguay, Uruguay and Argentina. Specimens of Calomys were collected in Formoso do Araguaia, Tocantins, Brazil. For chromosome characterization standard staining techniques and as G-banding and nucleolar organizer region were used. The karyotype was 2n=46 and AN=66. The X chromosome is a medium metacentric and the Y chromosome a small acrocentric chromosome. Chromosome homologies with other species were observed. Probably, karyotype differences were basically due to Robertsonian rearrangements.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calomys; Karyotype; Chromosome; Tocantins; Brazil.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200019
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BABESIA CABALLI : ANALYSIS OF CHROMOSOMES SEPARATED BY PULSE FIELD GEL ELECTROPHORESIS OAK
Ikadai, Hiromi; Kudo, Noboru; Oyamada, Takashi; Igarashi, Ikuo; 五十嵐, 郁男.
Palavras-chave: Babesia caballi; Pulsed field gel electrophoresis; Chromosome; Rhoptry gene.
Ano: 2004 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/642
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Chromosome analysis in cattle and horses Braz. J. Vet. Res. Anim. Sci.
AMARANTE,Mônica Regina Vendrame; TSURIBE,Patrícia Miyuki; JORGE,Wilham; ROCHA,Gilberto Pedroso da.
We analyzed the chromosomes of 117 cows of different breeds for the identification of centric fusion and the chromosomes of 100 young Andaluz and Brasileiro de Hipismo mares for the identification of 63,X lines, using the technique of X chromosome identification based on interstitial heterochromatin on the long arm.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Cattle; Horse; Chromosome.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962000000400006
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Chromosome loss in bi-parental progenies of tetraploid Pacific oyster Crassostrea gigas ArchiMer
Mccombie, Helen; Lapegue, Sylvie; Cornette, Florence; Ledu, Christophe; Boudry, Pierre.
Alterations of chromosome number have been observed in the somatic tissue of Crassostrea gigas diploids and artificial polyploids. Tetraploid oysters with abnormal chromosome numbers in some or all of their tissue are considered undesirable as parents either for triploids (produced via a cross with diploids and of aquacultural interest) or for tetraploid breeding. Aneuploid tetraploid oysters may confer the tendency to lose chromosomes and to revert to lower ploidy levels to their offspring. More directly, their offspring could have a lower ploidy because of potential links between somatic and gametic chromosome loss. The present study evaluated the phenomenon in six bi-parental tetraploid families bred from parents of differing somatic ploidy quality. The...
Tipo: Text Palavras-chave: Crassostrea gigas; Mitosis; Chromosome; Cytogenetics; Aneuploid; Polyptoid; Tetraploid; Oyster.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-633.pdf
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Chromosome loss in tetraploid families of the Pacific oyster Crassostrea gigas ArchiMer
Mccombie, Helen; Lapegue, Sylvie; Cornette, Florence; Ledu, Christophe; Boudry, Pierre.
Alterations of chromosome number have been observed in the somatic tissue of Crassostrea gigas diploids and artificial polyploids bred in this species. Tetraploid animals with lower chromosome counts in some or all of their somatic tissue are considered undesirable as parents either for commercial triploids (produced via a cross with diploids) or for tetraploid breeding because (1) they may confer the tendency to lose chromosomes and revert to lower ploidy levels to their offspring or (2) their offspring could have a lower ploidy directly because of potential links between somatic and gametic chromosome loss. The present study evaluated the phenomenon in bi-parental tetraploid families bred from parents of differing ploidy quality, including a...
Tipo: Text Palavras-chave: Tetraploid; Chromosome; Genetic; Crassostrea gigas; Oyster.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/acte-3435.pdf
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Chromosome number in germplasm accessions of Paspalum (Plicatula group) from different regions in Brazil. Repositório Alice
TAKAYAMA, S. Y.; FREITAS, P. M.; PAGLIARINI, M. S.; BATISTA, L. A. R..
1997
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Paspalum; Plicatula group; Chromosome; Germplasm; Cromossoma; Germoplasma.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/43986
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Chromosome studies in some Stevia. Cav. (Compositae) species from Southern Brazil Braz. J. Genet.
Frederico,Adriana P.; Ruas,Paulo M.; Marin-Morales,Maria A.; Ruas,Claudete F.; Nakajima,Jimi N..
Karyotypes of six species of the genus Stevia from Southern Brazil were studied, utilizing root tip metaphases. All species were diploid with 2n = 22 chromosomes. It was possible to identify each species by chromosome morphology. The basic chromosome number for Brazilian species of Stevia is X = 11. This number is also found in almost all South American species. We suggest that in Stevia there is an evolutionary trend toward chromosomal rearrangement, caused mainly by pericentric inversions. It was found that, in addition to aneuploidy and polyploidy, chromosomal rearrangements are common in the tribe Eupatorieae.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome; Stevia. Cav.; Southern Brazil.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551996000400013
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Classificação dos cromossomos do cavalo domestico (Equus caballus perissadactyla: equidae). Repositório Alice
TAMBASCO, A.J.; PERALTA, E.G..
Trabalho realizado em cavalos da raça manga-larga, no qual realizou-se o estudo do cariotipo mediante a técnica de cultura de linfocitos.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Eqüino; Citologia; Cariotipo; Cromossomos; Equine; Citology; Caryotipes; Chromosome; Equus caballus; Pirossodactyla equidae.
Ano: 1982 URL: http://www.alice.cnptia.embrapa.br/handle/doc/42782
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Comparative karyological study of cupped oyster species ArchiMer
Leitao, Alexandra; Boudry, Pierre; Labat, Jean-philippe; Thiriot-quievreux, Catherine.
Chromosomes of six cupped oyster species were studied using karyometric analysis alter conventional Giemsa staining, and silver staining, Karyotypes of Crassotrea angulata (nine metacentric and one submetacentric chromosome pairs), C. sikamea (nine metacentric and one submetacentric chromosome pairs), C. virginica (eight metacentric and two submetacentric chromosome pairs), C, ariakensis (eight metacentric and two submetacentric chromosome pairs), C, gasar (six metacentric and four submetacentric chromosome pairs), and Saccostrea commercialis (eight metacentric and two submetacentric chromosome pairs) are distinguishable by the number and position of the submetacentric chromosome pair and by the location of nucleolus organizer regions, Comparative...
Tipo: Text Palavras-chave: Bivalvia; Cytotaxonomy; Karyotype; Chromosome; Cupped oyster.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/publication-2737.pdf
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Cytogenetic and molecular characterization of Speothos venaticus specimens - doi: 10.4025/actascibiolsci.v32i4.6775 Biological Sciences
Carvalho, Thaís Lima; UNESP - IBB; Curi, Rogério Abdallah; UNESP - FMVZ; Santiloni, Valquíria; UNESP - IBB; Chieregatto, Cleyde Angélica Ferreira da Silva; Sociedade dos Zoológicos do Brasil; Rocha, Guaracy Tadeu; UNESP - IBB; Mota, Lígia Souza Lima Silveira da; UNESP - IBB.
The bush dog (Speothos venaticus) is a South American canid, included in the IBAMA (Brazilian Institute of Environment and Renewable Natural Resources) official list of animals threatened with extinction, in the vulnerable category. As a preservation and conservation strategy, specimens kept in captivity by Brazilian Institutions are monitored by a management plan. In order to characterize and analyze the genetic variability of bush dog specimens, a cytogenetic analysis was carried out, and microsatellite data were also obtained through the use of 15 primers, originally developed for the domestic dog (Canis familiaris). All tested primers showed transferability and amplified fragment sizes similar to those described for the canine genome. From the total...
Palavras-chave: 2.02.04.00-0 bush dog; Canids; Chromosome; Microsatellite; Mosaicism Genética Animal bush dog; Canids; Chromosome; Microsatellite; Mosaicism.
Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6775
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Cytogenetics of Pennisetum purpureum Schumack x Pennisetum glaucum L. hybrids and their parents Ciência e Agrotecnologia
Barbosa,Sandro; Davide,Lisete Chamma; Pereira,Antônio Vander.
Cytogenetic studies were carried out on five accesses of interspecific hybrids of Pennisetum purpureum and Pennisetum glaucum and their parentals, which are part of the Forage Germplasm Bank of the "Centro Nacional de Pesquisa de Gado de Leite" of EMBRAPA, Brazil. The mitotic cytogenetic analysis, performed using stain by Schiff reactive, confirmed the chromosome number of 2n = 14, 28 and 21 for the accesses of P. glaucum, P. purpureum and their hybrids, respectively. For each access, descriptions of the chromosome complement and idiograms are presented which allowed to establish the karyotypic relationships between the hybrids and their parentals. Based on the total chromosomal length data it was possible to establish the karyotype classification of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Elephant grass; Pearl millet; Interspecific hybrids; Cytogenetic; Ideograms; Chromosome.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000100003
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Diferenças entre o Pseudocereal Chenopodium quinoa Wild. e a planta daninha Chenopodium album L., Chenopodiaceae. Infoteca-e
SPEHAR, C. R.; SANTOS, R. L. B.; NASSER, L. C. B..
2001
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Cerrado; Caracteristica agronomica; Chromosome; Dormancy; Adaptability; Cultivar; Yield; Weeds; Quinoa; Chenopodium quinoa; Caracteristica; Planta invasora; Chenopodium album; Cultura: Quinoa.
Ano: 2001 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/564521
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Fluorescence in situ hybridization (FISH) or rDNA genes (5S and 18-5.8-28S) as a tool for chromosomal tagging and to assess the occurrence of somatic and sperm aneuploidy in Pacific oyster Crassostrea gigas ArchiMer
Benabdelmouna, Abdellah; Nadolna, Katarzyna; Ledu, Christophe.
Aneuploidy (or alteration of chromosome number) has been frequently described in diploid, triploid and tetraploid C. gigas. In diploid Pacific oysters, aneuploidy affects 1 to 3 chromosomes in up to 35% of the somatic cells and is positively correlated with inferior growth of the animal and thus could be associated with significant economic loss in this major aquaculture species. In polyploid Pacific oysters, aneuploidy was shown to be more heavily frequent and is linked to reversion to lower ploidy levels and is at the origin of aberrant gametes formation. In this context, identification of individual chromosomes involved in aneuploidy events both in somatic and germinal cells would be an important step towards the study of the exact occurrence of this...
Tipo: Text Palavras-chave: Chromosome; Aneuploidy; Genetic; Crassostrea gigas; Pacific oysters.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-3502.pdf
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Heterocromatina, localizacao de rons e fish em Rhammatocerus pratensis (Orthoptera - Gomphocerinae). Repositório Alice
LORETO, V.; SOUZA, M.J.; MELO, N. F. de.
2001
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Aspargo; DNAr; Hibridacao in situ; Citogenetica; Cromossomo; Asparagus officinalis; RDNA; In situ hybridization; Cytogenetics; Chromosome.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/134503
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Investigações preliminares sobre a duplicação do número de cromosomios da seringueira pela ação da Colchicina. Repositório Alice
MENDES, L. O. T..
A colchicina na duplicação do número de cromosomios de plantas. Alterações morfológicas em plantas poliploides. O número de cromosomios do gênero Hevea. Técnica para a contagem de cromosomios em tecidos somáticos de Hevea. A aplicação da colchicina na duplicação do número de cromosomios da seringueira. Alterações morfológicas observadas no grupo de seedlings de seringueira (Hevea brasiliensis) tratados pela colchicina.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Seringueira; Cromossomo; Genética; Seleção; Colchicina; Hevea brasiliensis; Poliploide; Rubber tree; Chromosome; Genetic; Selection; Colchicine.
Ano: 1946 URL: http://www.alice.cnptia.embrapa.br/handle/doc/385966
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Karyotypic diversification in Mytilus mussels (Bivalvia: Mytilidae) inferred from chromosomal mapping of rRNA and histone gene clusters ArchiMer
Perez Garcia, Maria Concepcion; Moran, Paloma; Pasantes, Juan J..
Background: Mussels of the genus Mytilus present morphologically similar karyotypes that are presumably conserved. The absence of chromosome painting probes in bivalves makes difficult verifying this hypothesis. In this context, we comparatively mapped ribosomal RNA and histone gene families on the chromosomes of Mytilus edulis, M. galloprovincialis, M. trossulus and M. californianus by fluorescent in situ hybridization (FISH). Results: Major rRNA, core and linker histone gene clusters mapped to different chromosome pairs in the four taxa. In contrast, minor rRNA gene clusters showed a different behavior. In all Mytilus two of the 5S rDNA clusters mapped to the same chromosome pair and one of them showed overlapping signals with those corresponding to one...
Tipo: Text Palavras-chave: Mytilus; Chromosome; Fluorescent in situ hybridization; Histone genes; Ribosomal RNA genes; Fibre-FISH.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00204/31500/29906.pdf
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Morphological characterization under different ecological habitats and physical mapping of 5S and 45S rDNA in Lilium distichum with fluorescence in situ hybridization RChHN
Hwang,Yoon-Jung; Song,Chang-Min; Younis,Adnan; Kim,Chang-Kil; Kang,Yoon-Im; Lim,Ki-Byung.
BACKGROUND: This study was performed to investigate the phenotypic, karyomorphological, and habitat environment characteristics of Lilium distichum that grows naturally in South Korea. Currently, this species follows limited distribution areas and its natural populations are at the brink of extinction mainly due to fragmentation or destruction its natural habitat. RESULTS: This species was distributed between approximately 1,000 and 1,500 m above sea level with an average temperature of 22°C. The soil characteristics surrounding the natural habitats included loamy and silt loam soils having organic matter content (10.82%), pH (5.22), electrical conductivity (EC) (0.37 dS/m), total nitrogen (0.45%), and cation exchange capacity (34.3 cmol+/kg). The peak...
Tipo: Journal article Palavras-chave: Chromosome; Karyotype; Habitat; Korea; 5S rDNA; 45S rDNA.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100008
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Polytypic and polymorphic cytogenetic variations in the widespread anuran Physalaemus cuvieri (Anura, Leiuperidae) with emphasis on nucleolar organizing regions Biol. Res.
QUINDERÉ,YEDA R. S. D; LOURENÇO,LUCIANA B; ANDRADE,GILDA V; TOMATIS,CRISTIAN; BALDO,DIEGO; RECCO-PIMENTEL,SHIRLEI M.
We investigated the NOR distribution in ten populations of Physalaemus cuvieri from different regions of Brazil and Argentina. A high variability in NOR pattern was observed and provided a useful tool in grouping several populations. The specimens from the state of Tocantins, northern Brazil, could easily be distinguished from all the other analyzed populations, since its karyotype presented NORs in the chromosome pairs 1,3,4 and 10 (and sometimes also in chromosome 5), and several pericentromeric C-bands. A NOR-site in chromosome 9 characterized three populations from the northeastern region of Brazil. Interestingly, the P. cuvieri populations located in opposite extremes of the geographic distribution had, as a fixed condition, the presence of NORs in 8q...
Tipo: Journal article Palavras-chave: Anura; Chromosome; Cytogenetics; NOR; Physalaemus; Polymorphic variations; Polytypic variations.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000100008
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The Karyotype of the parasitoid Chelonus insularis cresson (Hymenoptera, braconidae, cheloninae). Repositório Alice
SILVA-JUNIOR, J.C.; POMPOLO, S. das G.; CAMPOS, L.A. de O.; CRUZ, I..
The Karyotype of chelonus insularis (Hymenoptera, Braconidae Cheloninae) is described. The males show an haploid number of seven chromosomes and the females a diploid number of fourteen chromosomes, confirming haplo-diploid sex determination. Comparisons of these results with karyotypes of other species of the same family were done and a possible mechanism involved in the karyotype evolution of this species is discussed.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Citogenetica; Sexo; Determinacao; Cromossomo; Cytogenetic; Sex; Determination; Chromosome.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/484457
Registros recuperados: 20
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