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| Registros recuperados: 179 | |
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| Ericson, P.G.P.. |
| The paper summarizes the current understanding of the evolution and diversification of birds. New insights into this field have mainly come from two fundamentally different, but complementary sources of information: the many newly discovered Mesozoic bird fossils and the wealth of genetic analyses of living birds at various taxonomic levels. The birds have evolved from theropod dinosaurs from which they can be defined by but a few morphological characters. The early evolutionary history of the group is characterized by the extinctions of many major clades by the end of the Cretaceous, and by several periods of rapid radiations and speciation. Recent years have seen a growing consensus about the higher- level relationships among living birds, at least as... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Aves; Phylogeny; Systematics; Fossils; DNA; Genetics; Biogeography; 42.83. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/280479 |
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| Swierts, T.; Peijnenburg, K.T.C.A.; Leeuw, C. de; Cleary, D.F.R.; Hörnlein, C.; Setiawan, E.; Wörheide, G.; Erpenbeck, D.; Voogd, N.J. de. |
| The giant barrel sponge Xestospongia testudinaria is an ecologically important species that is widely distributed across the Indo-Pacific. Little is known, however, about the precise biogeographic distribution and the amount of morphological and genetic variation in this species. Here we provide the first detailed, fine-scaled (<200 km2) study of the morphological and genetic composition of X. testudinaria around Lembeh Island, Indonesia. Two mitochondrial (CO1 and ATP6 genes) and one nuclear (ATP synthase β intron) DNA markers were used to assess genetic variation. We identified four distinct morphotypes of X. testudinaria around Lembeh Island. These morphotypes were genetically differentiated with both mitochondrial and nuclear markers. Our results... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Xestospongia testudinaria; Indo-Pacific; DNA; Genetic composition; Sponge; 42.72. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/470573 |
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| Stigenberg, J.; Achterberg, K. van. |
| Background The tribe Centistini includes three genera, Allurus, Centistes and Centistoides (Stigenberg et al. 2015). They are solitary endoparasitoids of adults and final instar larvae of beetles from the family Curculionidae (Jackson 1920, Aeschlimann 1980, Tobias 1986) New information In this paper we present a key, molecular data (standard DNA barcode, CO1) and images of the two species of Allurus occurring in the Western Palaearctic. A third Oriental species described from China (Taiwan) is also included in the key. Allurus is a Holarctic genus with three known species (A. choui, A. lituratus, A. muricatus). Our sequence data confirms that A. muricatus and A. lituratus are two distinct and separate species and this paper points out good and easy... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Braconidae; Euphorinae; Allurus; Parasitic wasp; DNA. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/624483 |
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| Noronha,Aloyséia C.S.; Mota,Adilson; Moraes,Gilberto J.; Coutinho,Luiz L.. |
| A identificação dos ácaros geralmente é feita com base nas características morfológicas. Entretanto, as evidências morfológicas nem sempre são suficientes para a distinção de espécies muito próximas, levando o taxonomista a considerar aspectos ecológicos, biológicos e, mais recentemente, as características moleculares. A caracterização molecular de populações de Euseius citrifolius Denmark & Muma e E. concordis (Chant) foi realizada com o seqüenciamento da região dos espaçadores internos transcritos ITS1 e ITS2 utilizando-se os primers P1 (5'-AGAGGAAGTAAAAGTCGTAACAAG-3)' e P2 (5'-ATATGCTTAAATTCAGGGGG-3'), localizados nas regiões 18S e 28S do DNA ribossomal, respectivamente. Foram caracterizadas as seguintes populações: E. citrifolius: Arroio do... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Controle biológico; DNA; Fitoseídeo; Predador. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000400009 |
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| Moreira,Daniel A.; Buckup,Paulo A.; Britto,Marcelo R.; Magalhães,Maithê G. P.; Andrade,Paula C. C. de; Furtado,Carolina; Parente,Thiago E.. |
| ABSTRACT The complete mitogenome of Corydoras nattereri , a species of mailed catfishes from southeastern Brazil, was reconstructed using next-generation sequencing techniques. The mitogenome was assembled using mitochondrial transcripts from the liver transcriptomes of three individuals, and produced a circular DNA sequence of 16,557 nucleotides encoding 22 tRNA genes, two rRNA genes, 13 protein-coding genes and two noncoding control regions (D-loop, OrigL). Phylogeographic analysis of closely related sequences of Cytochrome Oxydase C subunit I (COI) demonstrates high diversity among morphologically similar populations of C. nattereri . Corydoras nattereri is nested within a complex of populations currently assigned to C. paleatus and C. ehrhardti .... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Barcode; DNA; Mitogenome; Molecular diversity; MtRNA.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100218 |
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| Veneza,Ivana; Silva,Raimundo da; Silva,Danillo da; Gomes,Grazielle; Sampaio,Iracilda; Schneider,Horacio. |
| ABSTRACT Lutjanidae comprises 21 genera and 135 species widespread throughout Atlantic, Indian and Pacific oceans. Nonetheless, the phylogenetic relationships of Lutjaninae remain uncertain. Furthermore, phylogenetic hypotheses for Lutjanus alexandrei, an endemic species from northeastern Brazilian coast, in Lutjanidae are absent so far. Therefore, we carried out multiloci analyses, combining both mitochondrial and nuclear DNA sequences in Lutjaninae species from Western Atlantic focusing on the controversial relationships among Lutjanus, Rhomboplites, and Ocyurus. Besides, we determined the phylogenetic position and dated the origin of L. alexandrei. The phylogenetics trees based on the 4.4 kb for 11 species corroborated the synonym among Lutjanus and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA; Lutjaninae; Phylogeny Molecular; Systematics; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000100211 |
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| Dautu, George; Munyaka, Biscah; Carmen, Gabriella; Zhang, Guohong; Omata, Yoshitaka; Xuan, Xuenan; Igarashi, Makoto. |
| A combination of antigenic regions of microneme proteins have been previously reported as being protective against chronic toxoplasmosis. In this work, we evaluated immune responses induced by immunizing BALB/c and C57BL/6 mice intradermally with plasmid DNA encoding the protein sequences of Toxoplasma gondii AMA1, MIC2, M2AP and BAG1. Mice immunized with the AMA1 gene developed high levels of serum IgG2a and c antibodies as well as cellular immune responses associated with IFN-γ synthesis suggesting a modulated Th1 type of response. Immunization with the AMA1 gene resulted in a partial but significant protection against the acute phase of toxoplasmosis compared to MIC2, M2AP and BAG1 genes. Therefore, the AMA1 gene appears to generate a strong specific... |
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Palavras-chave: Toxoplasma gondii; DNA; Deoxyribonucleic acid; DNA immunization; MIC2; Microneme protein-2; M2AP; MIC2 associated protein; AMA1; Apical membrane antigen-1; BAG1; Bradyzoite antigen-1; IgG; Immunoglobulin G. |
| Ano: 2007 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1031 |
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| Blanco, M.; Cruz, D.; Carro, S.; López, R.; Díaz, A.; Sánchez, L.; Santiago, L.; Guevara, C.; Sánchez, L.; Cuetara, E.B.; López, N.. |
| The analysis of DNA damage by mean of Comet or single cell gel electrophoresis (SCGE) assay has been commonly used to assess genotoxic impact in aquatic animals being able to detect exposure to low concentrations of contaminants in a wide range of species. The aims of this work were 1) to evaluate the usefulness of the Comet to detect DNA strand breakage in dolphin leukocytes, 2) to use the DNA diffusion assay to determine the amount of DNA strand breakage associated with apoptosis or necrosis, and 3) to determine the proportion of DNA strand breakage that was unrelated to apoptosis and necrosis. Significant intra-individual variation was observed in all of the estimates of DNA damage. DNA strand breakage was overestimated because a considerable amount... |
| Tipo: Journal Contribution |
Palavras-chave: DNA; Species. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3354 |
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| Castellanos Gell, J.. |
| La mayoría de los peces de arrecifes poseen un estadio larval pelágico durante el cual pueden ser transportados largas distancias. La inferencia de estos patrones de conectividad a partir de estudios genético-poblacionales, ha cobrado gran auge debido a su utilidad en el diseño de áreas marinas protegidas. Este trabajo se propone analizar la influencia de las posibles barreras físicas, la biología de la especie y sus potenciales de dispersión, en la estructura genética de Stegastes partitus y brindar elementos al esclarecimiento de esta problemática en el archipiélago cubano. Se colectaron individuos de cinco localidades del archipiélago cubano: Los Canarreos y La Bajada, en la región Suroccidental; y por el Norte: Cayo Coco, Los Colorados, y... |
| Tipo: Theses and Dissertations |
Palavras-chave: Population genetics; Marine structures; DNA; Genetic selection. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5513 |
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| Chaieb, O.. |
| La tortue marine, la caouanne (Caretta caretta), est une espèce en danger d’extinction. Elle est caractérisée par un cycle biologique complexe se basant sur une série de transitions écologiques et géographiques nécessitant des migrations sur de longues distances. En Tunisie, plusieurs études ont été réalisées sur les activités de nidification et les interactions avec les activités de pêche, mais, aucune n’a porté sur l’étude génétique de cette espèce. Dans ce travail, nous nous sommes intéressés à l’analyse génétique de la population nidifiante en Tunisie et des populations des tortues se développant dans les zones néritiques tunisiennes. La population nidifiante a été appréhendée par l’analyse des nouveau-nés échantillonnés durant une période de sept ans... |
| Tipo: Theses and Dissertations |
Palavras-chave: Allozymes; DNA; Genetic diversity; Neritic province. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5923 |
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| Rondón-González, F.; Amorocho, D.; Camacho_Mosquera, L.; Mejía-Ladino, L.M.; Palacio-Mejía, J.D.. |
| Con el fin de caracterizar genéticamente la colonia anidante de Lepidochelys olivacea en playa Palmeras-Parque Nacional Natural Gorgona (PNNG) y contribuir a la implementación de estrategias de conservación para la especie, se secuenció un fragmento de la región + (D-loop) del ADN mitocondrial en 29 individuos, a partir del cual se estimó la diversidad genética y se infirieron las posibles relaciones filogenéticas al comparar la misma secuencia con datos publicados en el GenBank. El análisis de las secuencias reveló la presencia de dos haplotipos N (96.55%) y E (3.45%), de acuerdo con las secuencias registradas para esa especie. La diversidad genética y nucleotídica de la colonia estudiada es h=0.069 y π=0.023%, respectivamente. |
| Tipo: Journal Contribution |
Palavras-chave: DNA; Conservation. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3503 |
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| Duhalde, G.B.; Introzzi, A.E.. |
| The concentration of nucleic acids (RNA and DNA)was reviewed, as well as the RNA/DNA coefficient, in white muscle and liver of Mugil brasiliensis adult females caught at the Mar Chiquita Coastal Laggon (37°30'S, 57°20'W)between September and March. Countrary to what observations in other species (Lepomis macrochirus and Clarias batrachus)have shown, i.e., a decrease in muscle RNA/DNA during gonadal maturation, Mugil brasiliensis would seem to maintain a proteic balance in equilibrium during the said period. No significant correlation was found between IGS and the RNA, DNA and RNA/DNA muscular variables. |
| Tipo: Journal Contribution |
Palavras-chave: Sexual maturity; Nucleic acids; DNA; Nucleic acids; Sexual maturity. |
| Ano: 1986 |
URL: http://hdl.handle.net/1834/2035 |
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| Registros recuperados: 179 | |
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