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| Registros recuperados: 68 | |
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| Farrugia, A.F.; Pla, C.; Viñas, J.; Tawil, M.Y.; Hattour, A.; de la Serna, J.M.. |
| None of the previous genetic analysis found significant differences within the Mediterranean. However, a more exhaustive analysis is needed inside this sea. In this sense, we have analyzed the mitochondrial control region sequence variability of three Mediterranean locations: Libya (n = 22), Tunisia (n = 23) and Malta (n = 12). Additionally a sample from the Gulf of Cadiz (n = 24) in the East Atlantic Ocean was also included in the study. The AMOVA analysis revealed slightly (Fst = 0.013) but significative genetic differences (P < 0.000) for the Malta location, probably due to its small sample size (n = 12). In the other hand, when this location is removed from the analysis, no differences where found among the three remaining location (Fst = 0,005; P =... |
| Tipo: Journal Contribution |
Palavras-chave: Atlantic ocean; Mitochondrial DNA; Bluefin tuna; Sequencing; Genetic characterization; Mediterranean sea; Tuna fisheries. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/792 |
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| Matte,Eunice M.; Castilho,Camila S.; Miotto,Renata A.; Sana,Denis A.; Johnson,Warren E.; O'Brien,Stephen J.; Freitas,Thales R. O. de; Eizirik,Eduardo. |
| The puma is an iconic predator that ranges throughout the Americas, occupying diverse habitats. Previous phylogeographic analyses have revealed that it exhibits moderate levels of genetic structure across its range, with few of the classically recognized subspecies being supported as distinct demographic units. Moreover, most of the species' molecular diversity was found to be in South America. To further investigate the phylogeographic structure and demographic history of pumas we analyzed mtDNA sequences from 186 individuals sampled throughout their range, with emphasis on South America. Our objectives were to refine the phylogeographic assessment within South America and to investigate the demographic history of pumas using a coalescent approach. Our... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation genetics; Mammals; Mitochondrial DNA; Molecular time estimate; Phylogeography. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400018 |
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| Criscione, F.; Köhler, F.. |
| Kimberleytrachia Köhler, 2011 is a genus of camaenid land snail endemic to the Western Australian Kimberley region. It comprises twelve previously recognised species, all of which occur within the high precipitation zone along the north-western coast between the Admiralty Gulf and King Sound and within less than about 50 km distance from the coast. By evaluating the variation in shell and genital anatomy as well as the differentiation in the mitochondrial markers 16S and COI, we assess the monophyly of Kimberleytrachia with respect to other camaenid genera from north-western Australia. In addition, we newly describe six species (K. jacksonensis n. sp., K. leopardus n. sp., K. nelsonensis n. sp., K. serrata n. sp., K. setosa n. sp. and K. silvaepluvialis n.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Genetic distances; Helicoidea; Mitochondrial DNA; New species; Stylommatophora; 42.73; 42.64. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/506810 |
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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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| FADIC,RICARDO. |
| Understanding muscle cell in disease and health is an unfinished process. Following the lead of Jaime Alvarez, I have had the opportunity of working on two complementary approaches to this field. One is the study of muscle cell surface molecules. Both synaptic muscle molecules, such as the asymmetric form of acetylcholinesterase, and extrasynaptic molecules, such as the extracellular matrix proteoglycans, are regulated by the motor nerve activity. This illustrates one of Jaime's teachings: cell phenotypes are a dynamic process that reflects the influence of other cells (<A HREF="#0">Alvarez, 2001</A>). Proteoglycans have many functions, including growth factor receptors. Studying them in muscular dystrophy will contribute to the comprehension... |
| Tipo: Journal article |
Palavras-chave: Mitochondrial DNA; Muscle disease; Muscular dystrophy; Proteoglycans. |
| Ano: 2001 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602001000200018 |
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| Wang,Ling; Zhou,Xuming; Nie,Liuwang. |
| Three complete mitochondrial DNA (mtDNA) control regions (CRs) of Chelodina rugosa (Ogilby, 1890), Chelus fimbriata (Schneider, 1783), and Podocnemis unifilis (Troschel, 1848) were firstly determined using Long-PCR method and the length were 1,016 bp, 1,149 bp, and 985bp, respectively. Together with CRs of Pelomedusa subrufa (Bonnaterre, 1789) and nearly complete CR of Podocnemis expansa (Schweigger, 1812) obtained from GenBank, the structural and evolutionary characteristics of mtDNA CRs in pleurodiran turtle were analyzed in this study. We identified three functional domains (TAS, CD, and CSB domains) as well as their conservation sequences (TAS, CSB-F, and CSB-1) according to their homology to those of other turtles. Within the TAS domain, an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Control region; CSB; Mitochondrial DNA; Molecular evolution; Pleurodira. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400011 |
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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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| Zajc, I.; Arntzen, J.W.. |
| European newts (genus Triturus) are widely studied, but their phylogeny is not yet unambiguously resolved. Fragments of mitochondrial DNA experiencing different rates of evolution (the ATPase and 12S rRNA genes) were sequenced in order to test a phylogenetic hypothesis derived from biochemical and behavioral data. Well-supported branches of the existing phylogeny gained support in our study. The monophyletic origin of the hypothesized T. boscai — T. italicus clade remained ambiguous, whereas strong support was gained for the sister-taxon relationship of T. vulgaris and T. montandoni. The position of T. vittatus as a sister taxon to the T. marmoratus species group was also supported. The phylogenetic position of T. alpestris could not be clarified. With an... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 12S rRNA; ATPase; Mitochondrial DNA; Newt; Phylogeny; Triturus. |
| Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/534335 |
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| da Silva Santos,Anelisie; Trigo,Tatiane Campos; de Oliveira,Tadeu Gomes; Silveira,Leandro; Eizirik,Eduardo. |
| Abstract The pampas cat is a small felid that occurs in open habitats throughout much of South America. Previous studies have revealed intriguing patterns of morphological differentiation and genetic structure among its populations, as well as molecular evidence for hybridization with the closely related L. tigrinus. Here we report phylogeographic analyses encompassing most of its distribution (focusing particularly on Brazilian specimens, which had been poorly sampled in previous studies), using a novel dataset comprising 2,143 bp of the mitogenome, along with previously reported mtDNA sequences. Our data revealed strong population strutucture and supported a west-to-east colonization process in this species’ history. We detected two population expansion... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phylogeography; Population genetics; Mitochondrial DNA; Conservation genetics; Historical demography. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200273 |
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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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| Xavier, J.R.; Soest, R.W.M. van; Breeuwer, J.A.J.; Martins, A.M.F.; Menken, S.B.J.. |
| In this study we assessed the sequence variation in the I3-M11 partition of the mtDNA cytochrome c oxidase subunit I gene (COI) in ten populations of the Atlanto-Mediterranean demosponge Phorbas fictitius (Porifera: Poecilosclerida) at two spatial scales: a regional scale comparing mainland (Iberian) and insular (Macaronesian) populations, and a local (Archipelagic) scale focusing on different island populations of the Azores archipelago. A multiple approach combining diversity measures, FST estimates, phylogenetic inference and nested clade phylogeographic analysis was used to assess the genetic structure and elucidate the evolutionary history of this species. Genetic differentiation, based of FST estimates, was found among most populations at both scales... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Azores; Genetic diversity; Iberia; Macaronesia; Mitochondrial DNA; Porifera; 42.72. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/355610 |
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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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| 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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| SOUSA,RODRIGO P.C. DE; SODRÉ,DENISE; COSTA,RAUQUÍRIO M. DA; VALLINOTO,MARCELO; OLIVEIRA,EDIVALDO H.C.; SILVA-OLIVEIRA,GLÁUCIA C.; SAMPAIO,IRACILDA; GUIMARÃES-COSTA,AURYCÉIA. |
| Abstract: This study presents the first record of Elops smithi for northern Brazil. The evidence suggests this species is being misidentified incorrectly as Elops saurus in estuaries of the Western Atlantic Ocean. Here, morphological, molecular, and cytogenetic evidence identified all ladyfish specimens from one estuary in the region as E. smithi. Thus, at least Elops smithi occurs in the northern coast of Brazil and it is recommended that specimens from this region identified as E. saurus be further investigated with genetic and cytogenetic tools in order to assure a correct species identification. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elopidae; Karyotype; Ladyfish; Malacho; Mitochondrial DNA. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700622 |
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| Registros recuperados: 68 | |
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