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| Registros recuperados: 68 | |
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| Abreu-Silva,R.S.; Lezirovitz,K.; Braga,M.C.C.; Spinelli,M.; Pirana,S.; Della-Rosa,V.A.; Otto,P.A.; Mingroni-Netto,R.C.. |
| Mitochondrial mutations are responsible for at least 1% of the cases of hereditary deafness, but the contribution of each mutation has not yet been defined in African-derived or native American genetic backgrounds. A total of 203 unselected hearing-impaired patients were screened for the presence of the mitochondrial mutation A1555G in the 12S rRNA gene and mutations in the tRNA Ser(UCN) gene in order to assess their frequency in the ethnically admixed Brazilian population. We found four individuals with A1555G mutation (2%), which is a frequency similar to those reported for European-derived populations in unselected samples. On the other hand, complete sequencing of the tRNA Ser(UCN) did not reveal reported pathogenic substitutions, namely A7445G,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mitochondrial DNA; Hearing impairment; A1555G mutation; TRNA Ser(UCN) mutations; European- and African- Brazilian patients. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200008 |
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| Aguiar,Jonas; Schneider,Horacio; Gomes,Fátima; Carneiro,Jeferson; Santos,Simôni; Rodrigues,Luis R.; Sampaio,Iracilda. |
| The tambaqui, Colossoma macropomum, is the most popular fish species used for aquaculture in Brazil but there is no study comparing genetic variation among native and farmed populations of this species. In the present study, we analyzed DNA sequences of the mitochondrial DNA to evaluate the genetic diversity among two wild populations, a fry-producing breeding stock, and a sample of fish farm stocks, all from the region of Santarém, in the west of the Brazilian state of Pará. Similar levels of genetic diversity were found in all the samples and surprisingly the breeding stock showed expressive representation of the genetic diversity registered on wild populations. These results contrast considerably with those of the previous study of farmed stocks in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tambaqui; Mitochondrial DNA; Genetic variability; Aquaculture. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401439 |
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| Aguirre-Obando,Oscar A.; Bona,Ana C. Dalla; Duque L.,Jonny E.; Navarro-Silva,Mário A.. |
| Mosquito control prevails as the most efficient method to protect humans from the dengue virus, despite recent efforts to find a vaccine for this disease. We evaluated insecticide resistance and genetic variability in natural populations of Aedes aegypti (Linnaeus, 1762) from Colombia. This is the first Colombian study examining kdr mutations and population structure. Bioassays with larvae of three mosquito populations (Armenia, Calarcá and Montenegro) were performed according to the World Health Organization (WHO) guidelines, using Temephos. For the analysis of the Val1016Ile mutation and genetic diversity, we sampled recently-emerged adults from four mosquito populations (Armenia, Calarcá, Montenegro and Barcelona). Following the WHO protocol, bioassays... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioassays; Gene flow; Knockdown resistance; Mitochondrial DNA; ND4 gene. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000100014 |
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| AGUIRRE-PABÓN,J.C; OROZCO BERDUGO,G. Jr; NARVÁEZ BARANDICA,J.C. |
| The tiger shrimp (Penaeus monodon) is an Indo-Pacific species. Its global production between 1970 and 1980 exceeded all other shrimp species, which favored its introduction and cultivation outside its natural range in several countries of Africa, Europe, USA and South America. It is currently found in the coast of the Atlantic Ocean (Mexico, United States, Puerto Rico, Brazil, Guyana, Venezuela and Colombia). Despite the risk involved, no studies have been conducted to evaluate their impact as a possible invasive species and their genetic condition. This study evaluated the genetic status and population origin of P. monodon in the northernmost Colombian Caribbean, analyzing the mitochondrial DNA control region (mtDNA-CR). 16 individuals were randomly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological invasion; Caribbean Sea; Founder effect; Genetic relationships; Mitochondrial DNA. |
| Ano: 2015 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100013 |
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| Aral,Cenk; Akkiprik,Mustafa; Kaya,Handan; Ataizi-Çelikel,Çigdem; Çaglayan,Sinan; Özisik,Gökhan; Baloglu,Hüseyin; Özer,Ayse. |
| Recently, efforts have been focused on mitochondrial DNA changes and their relation to human cancers. Among them, a 4977 bp deletion of mitochondrial DNA, named "common deletion", has been investigated in several types of tumors, with inconsistent results. In this study, we investigated the presence of the common deletion in tissues from 25 breast, 25 colorectal and 50 thyroid tumors and in the adjacent healthy tissues from Turkish patients. Samples from healthy volunteers were also evaluated for comparison. Two PCR-based methods were used for the detection of the common deletion. First, two pairs of primers were used to amplify wild-type and deleted mtDNA. Then, a highly sensitive nested-PCR was performed, to determine low amounts of deleted genomes. By... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mitochondrial DNA; Common deletion; Cancer. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000100001 |
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| Arntzen, J.W.; McAtear, J.; Recuero, E.; Ziermann, J.M.; Ohler, A.; Alphen, J. van; Martínez-Solano, I.. |
| The Common toad Bufo bufo sensu lato is a widespread, morphologically conserved taxon. Recent studies have uncovered deep genetic differentiation between population groups, highlighting the need to revise the current taxonomy of the group and recognize additional species. Here we investigate patterns of variation in molecular (a mitochondrial DNA restriction enzyme assay and sequence data for two nuclear DNA fragments totalling 979 bp) and 17 morphological variables in Northern France where two of these groups meet (B. bufo sensu stricto and B. spinosus), in order to delineate their contact zone and uncover characters that would allow discrimination of the two taxa. Mitochondrial DNA data show an abrupt transition from areas where B. bufo is present to... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bufo bufo; Bufo spinosus; Common toad; Contact zone; France; Mitochondrial DNA; Morphometrics; Nuclear DNA; 42.82. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/475530 |
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| Azevedo,Marisa F.C.; Oliveira,Claudio; Pardo,Belén G.; Martínez,Paulino; Foresti,Fausto. |
| The fish order Pleuronectiformes, composed of 14 families, has two suborders: Psettodoidei (with one family) and Pleuronectoidei (with thirteen families). The relationships among families of Pleuronectoidei and among the genera of their families have extensively been debated and a consensus has not yet been reached. In the present study, partial sequences of the 12S and 16S mitochondrial rRNA genes were obtained from 19 species belonging to the families Achiridae, Bothidae, Cynoglossidae, Paralichthyidae, Pleuronectidae, Scophthalmidae, and Soleidae. Additional sequences of 42 pleuronectiform species were obtained from GenBank. Phylogenetic analyses were conducted by the methods of maximum-parsimony, maximum-likelihood and Bayesian inference. Our results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phylogeny; Molecular systematics; Mitochondrial DNA; Fish evolution; Flatfishes. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200023 |
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| Barnett, R.; Yamaguchi, N.; Shapiro, B.; Nijman, V.. |
| In natural history collections throughout Europe, there are many old lion specimens of unknown origin. If these specimens can be shown to have originated from now-extinct populations their value would significantly increase, as would the value of the collections. Recently, a 200-year old mounted skeleton in the Zoological Museum Amsterdam has been identified as the extinct Cape lion Panthera leo melanochaita (Smith, 1842), based primarily on morphological information inferred from a painting of this specimen while it was still alive. To test this hypothesis, we used ancient DNA (aDNA) techniques to extract and sequence mitochondrial DNA (mtDNA) from this specimen, and compared the genetic results with previously published lion mtDNA sequences. Our results... |
| Tipo: Article / Letter to the editor |
Palavras-chave: India; Mitochondrial DNA; Panthera leo; Skull morphology; South Africa; 42.84. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/226454 |
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| Becerra V,Viviana; Paredes C,Mario; Debouck,Daniel. |
| The Chilean common bean (Phaseolus vulgaris L.) belongs to the cultivated race Chile and its origin is presumably Andean. The objective of this study was to identify the origin of a group of Chilean accessions based on their genetic relationship with wild material from the Mesoamerican and Andean common bean gene pool. To achieve this objective, universal primers of chloroplast DNA (cpDNA) and mitochondrial DNA (mtDNA) were used to detect polymorphism using Polymerase Chain Reaction - Restriction Fragment Length Polymorphism (PCR-RFLP). Thirty-two genotypes were analyzed, including wild material from Mexico, Ecuador, Peru, Bolivia, and Argentina, as well as Chilean cultivated genotypes belonging to endemic Chilean accession types (Tórtola, Coscorrón, and... |
| Tipo: Journal article |
Palavras-chave: Chilean common bean germplasm; Chloroplast DNA; Mitochondrial DNA; PCR-RFLP. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100001 |
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| Benítez Alemán, Héctor Eduardo. |
| La identificación precisa de heces de carnívoros silvestres es importante para describir sus hábitos alimenticios, sobre todo en aquellas especies elusivas o en riesgo. Sin embargo Identificar las heces de especies de carnívoros simpátricos no es una tarea sencilla. Por ello, las técnicas moleculares, son herramientas que brindan mayor precisión en la identificación de heces. El análisis de hábitos alimenticios aporta información valiosa para entender la estructura poblacional de los depredadores y sus presas, así como su importancia ecológica para generar estrategias de manejo y conservación de carnívoros y sus presas. Los objetivos de este estudio fueron identificar las heces de carnívoros extrayendo ADN mitocondrial de estas y amplificando un fragmento... |
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Palavras-chave: ADN mitocrondrial; Citocromo b; PCR-RFLP; Hábitos alimenticios; Carnívoros; Mitochondrial DNA; Cytochrome b; Food habits; Carnivores; Ganadería; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2291 |
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| Bona,Ana C. Dalla; Piccoli,Carla F.; Leandro,André de S.; Kafka,Rosinei; Twerdochilib,Adriana L.; Navarro-Silva,Mário A.. |
| The genetic variability of populations of Aedes (Stegomyia) aegypti (Linnaeus, 1762) is often low due to the intense selection pressure caused by chemical control measures. In this study, we evaluated the susceptibility of larvae and adults of this mosquito to chemical insecticides, the frequency of the Val1016IIe mutation, and the genetic variability of the mitochondrial ND4 gene fragment in the urban area of Foz do Iguaçu, Paraná. The populations of A. aegypti in the southern and central regions of the city were resistant to the diagnostic dose of temephos 0.0162 ppm. Additionally, we detected difference in susceptibility in the northern population. The resistance ratios (RR95) were 3.8, 4.1, and 4.6 for the populations in the north, central, and south... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Knockdown resistance; Mitochondrial DNA; Pyrethroids; Temephos. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000600005 |
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| Boudry, Pierre; Huvet, Arnaud. |
| The taxonomic status of Crassostrea angulata and Crassostrea gigas has long been a matter of controversy. Morphological and physiological similarities, as well as homogeneity in allelic frequencies on allozymes between the populations of the two taxa, lead most authors to suggest to regroup of the two within the same species. European and Asian populations of C. gigas and C. angulata have been studied using microsatellite and mitochondrial DNA markers. The analysis of genetic distances and the distribution of allelic and haplotype frequencies revealed a differentiation between the populations of C. gigas and C. angulata. The data allowed the construction of Neighbor-joining trees for each of the two types of markers. Similar topologies appeared with data... |
| Tipo: Text |
Palavras-chave: Mitochondrial DNA; Nuclear DNA; Phylogeography; Crassostrea angulata; Crassostrea gigas; Genetic; Oyster. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/acte-3434.pdf |
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| Bourjea, Jerome; Lapegue, Sylvie; Gagnevin, L; Broderick, D; Mortimer, J.a.; Ciccione, S; Roos, David; Taquet, Coralie; Grizel, Henri. |
| Patterns of mitochondrial DNA (mtDNA) variation were used to analyse the population genetic structure of southwestern Indian Ocean green turtle (Chelonia mydas) populations. Analysis of sequence variation over 396 bp of the mtDNA control region revealed seven haplotypes among 288 individuals from 10 nesting sites in the Southwest Indian Ocean. This is the first time that Atlantic Ocean haplotypes have been recorded among any Indo-Pacific nesting populations. Previous studies indicated that the Cape of Good Hope was a major biogeographical barrier between the Atlantic and Indian Oceans because evidence for gene flow in the last 1.5 million years has yet to emerge. This study, by sampling localities adjacent to this barrier, demonstrates that recent gene... |
| Tipo: Text |
Palavras-chave: Phylogeography; Mozambique Channel; Mitochondrial DNA; Indian Ocean; Control region; Chelonia mydas. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2185.pdf |
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| Briñez, Boris; Universidade Estadual de Maringá; Júlio Júnior, Horacio Ferreira; Universidade Estadual de Maringá; Prioli, Sonia Maria Alves Pinto; Universidade Estadual de Maringá; Maniglia, Thiago Cintra; Núcleo de Pesquisas em Limnologia, Ictiologia e Aqüicultura (Nupelia), Universidade Estadual de Maringá; Prioli, Alberto José; Universidade Estadual de Maringá. |
| Espécies de tucunaré foramn introduzidas em inúmeras bacias hidrográficas da América do Sul e em outras regiões do planeta, principalmente devido as suas características esportivas, de peixe lutador. Revisão recente das espécies do gênero Cichla mostraram que as espécies que foram introduzidas nos reservatórios das regiões Sul, Sudeste e Nordeste, são duas espécies novas, descritas como Cichla kelberi (tucunaré amarelo) e Cichla piquiti (tucunaré azul) identificadas erroneamente como C. monoculus e C. ocellaris. Com o objetivo de identificar as populações de Cichla presentes no Rio Paranapanema e Paraná, foram sequenciadas um total de 323 pares de bases (pb) da região controle (MtDNA) obtidas de oitenta e quatro indivíduos de Cichla em cinco localidades... |
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Palavras-chave: 2.02.02.00-8 species introduction; C. monoculus; Mitochondrial DNA; Peacock bass; Paraná river Genética Species introduction C.monoculus MtDNA control region Peacock bass Upper Paraná River Tucunaré. Introdução de espécies C.monoculus região controle (MtDNA) Tucunaré Genética. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10684 |
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| Coimbra,Raphael Teodoro Franciscani; Miranda,Flávia Regina; Lara,Camila Clozato; Schetino,Marco Antônio Alves; Santos,Fabrício Rodrigues dos. |
| Abstract Cyclopes didactylus, commonly called silky anteater, is the smallest and least studied of the anteaters. It is an arboreal species occurring in rainforests, ranging from southern Mexico to Central and South America, with an apparently disjoint distribution between Amazon and Atlantic rainforests in Brazil. Although seven subspecies are recognized, little is known about its geographical variation. Thus, to evaluate the population dynamics and evolutionary history of the South American silky anteater, we analyzed 1542 bp sequences of the mitochondrial control region (CR), COI and Cyt-b genes of 32 individuals. Haplotype network, AMOVA and molecular dating analyses were performed and identified seven geographic clusters. The split of lineages... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Xenarthra; Mitochondrial DNA; Population structure; Molecular dating; South America. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000100040 |
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| Registros recuperados: 68 | |
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