Data/hora: 09/06/2024 14:10:40

Provedor de dados: | 27
País: | Belgium
Título: | 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;
Autores: | Gajardo, G.; Mercado, C.; Beardmore, J.A.; Sorgeloos, P.
Data: | 1999
Ano: | 1999
Palavras-chave: | Allopatric populations; Allozymes; Genetic isolation; Hybridization; Population genetics; Chile.
Resumo: | 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 the analysis of 15 loci it seems to be closer to &lt;i&gt;A. persimilis&lt;/i&gt; (D Nei=0.211) than to &lt;i&gt;A. franciscana&lt;/i&gt; (&lt;i&gt;D&lt;/i&gt;=0.591). Laboratory cross-fertility tests do not suggest barriers to gene flow or infertility in accordance with electrophoretic results (genetic distance values or population-specific alleles), though offspring quality tended to be biased toward the production of cysts rather than nauplii, most obviously in &lt;i&gt;F&lt;/i&gt;&lt;sub&gt;3&lt;/sub&gt;, which may be an indication of post-zygotic reproductive isolation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4016
Fonte: | %3Ci%3EHydrobiologia+405%3C%2Fi%3E%3A+117-123
Fonte: | info:eu-repo/semantics/restrictedAccess