Consulta: subjectFacets:"Genetic isolation"
Registros recuperados: 4
Data/hora: 04/06/2024 00:14:34

Impact of the reproduction dynamics on genetic variation in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Lapegue, Sylvie; Taris, Nicolas; Lallias, Delphine; Bonhomme, Francois; Boudry, Pierre.
The European flat oyster (Ostrea edulis L.) is a marine bivalve whose natural geographical distribution ranges along the European Atlantic coast from Norway to Morocco, in addition to the Mediterranean and Black Sea. The latest results obtained on the genetic differentiation between these populations have led us to pursue studies at a finer scale, in order to estimate the effective number of breeders and the temporal dynamics of reproduction and, more specially, recruitment. Several experiments were performed to document (1) the variance in allele frequencies during a natural settlement period; (2) the paternal contribution to fertilization by analyzing larvae sampled at the brooding stage within individual females; (3) the variance of individual...
Tipo: Text
Palavras-chave: Ostrea edulis; Oyster; Sexual reproduction; Population dynamics; Oyster culture; Inbreeding; Heterosis; Genetic isolation; Genetic diversity; Breeding success; Biological fertilization.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-3436.pdf

Increased genetic diversity in Greek populations of the genus Ligidium (Crustacea: Isopoda: Oniscidea) revealed by RFLP analysis of mtDNA segments
Provedor de dados: 16
Autores: Klossa-Kilia, E.; Kilias, G.; Sfenthourakis, S.
We investigated mtDNA genetic differentiation and the phylogenetic relationships of 11 populations of the oniscidean genus Ligidium. We studied nine populations from Greece, assigned to three nominal species (L. euboicum, L. germanicum and L. beieri), and two from central Europe (L. germanicum and L. hypnorum), applying RFLP analysis of two mtDNA segments (12S rDNA and 16S rDNA) amplified by PCR. The analysis revealed seven monomorphic and four polymorphic populations, and 17 different haplotypes, each one present in one population only. Several restriction enzymes produced population specific patterns, enabling discrimination among the different populations. The estimated net nucleotide divergence between populations ranges from 1.06 to 16.52%, while the...
Tipo: Article / Letter to the editor
Palavras-chave: Oniscidea; Greece; MtDNA; RLFPs; Genetic isolation; Ligidium; Isopods; 16S rDNA; 12S rDNA; 42.74.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/209650

Aislamiento de Microsatélites y flujo Genético en Dosidicus Gigas (D'Orbigny, 1835) entre el Golfo de California y La Costa Occidental de La Península de Baja California, México
Provedor de dados: 20
Autores: Millán, A.M.
El calamar gigante, Dosidicus gigas (D'Orbigny, 1835) es una especie semioceánica y nerítica endémica del Pacífico Oriental, distribuida desde el norte de California E.U.A (43º N) hasta el sur de Chile (20°S), incluyendo el Golfo de California. Habita aguas desde la superficie hasta 1000 metros de profundad. Particularmente dentro del Golfo de California (México), es considerado uno de los recursos pesqueros más importantes, sin embargo el manejo de la pesquería de éste cefalópodo enfrenta varias dificultades entre las que se encuentran: un corto ciclo de vida, tasa de crecimiento desigual y falta de caracteres morfométricos y/o merísticos debido a la extrema plasticidad morfológica. Con el fin de determinar si existe estructura genética poblacional en D....
Tipo: Theses and Dissertations
Palavras-chave: Genetic isolation; Cephalopod fisheries; Population genetics; Population genetics; Http://aims.fao.org/aos/agrovoc/c_34326.
Ano: 2010
URL: http://hdl.handle.net/1834/3657

International study on &lt;i&gt;Artemia&lt;/i&gt; : LX. Allozyme data suggest that a new &lt;i&gt;Artemia&lt;/i&gt; population in southern Chile (50° 29' S; 73° 45' W) is &lt;i&gt;A. persimilis&lt;/i&gt;
Provedor de dados: 27
Autores: Gajardo, G.; Mercado, C.; Beardmore, J.A.; Sorgeloos, P.
An &lt;i&gt;Artemia&lt;/i&gt; population from a site recently described in Chile and located in a semi-arid and humid hydrographical zone (Torres del Paine National Park), was electrophoretically characterized and cross-bred (followed through &lt;i&gt;F&lt;/i&gt;&lt;sub&gt;3&lt;/sub&gt;) to reference samples of &lt;i&gt;A. franciscana&lt;/i&gt; (San Francisco Bay, California, USA) and &lt;i&gt;A. persimilis&lt;/i&gt; (Buenos Aires, Argentina), which are the species most likely to be found in Chile. The population exhibited high levels of genetic variability as judged by the percentage of polymorphic loci (&lt;i&gt;P&lt;/i&gt;=53.3), mean number of alleles per locus (&lt;i&gt;n&lt;/i&gt;=2.2) and mean heterozygosity (&lt;i&gt;H&lt;/i&gt;=0.176). Based on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allopatric populations; Allozymes; Genetic isolation; Hybridization; Population genetics; Chile.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4016