Consulta: creatorFacets:"Fonseca, Vera"
Registros recuperados: 2
Data/hora: 02/06/2024 05:23:15

Comparative study of shell shape and muscle scar pigmentation in the closely related cupped oysters Crassostrea angulata, C. gigas and their reciprocal hybrids
Provedor de dados: 5
Autores: Batista, Frederico; Ben-hamadou, Radhouan; Fonseca, Vera; Taris, Nicolas; Ruano, Francisco; Reis-henriques, Maria; Boudry, Pierre.
The taxonomic status of the cupped oysters Crassostrea angulata and C. gigas has received considerable attention in the last decades. Based on larval shell morphology, experimental hybridization, allozymes and nuclear DNA studies several authors have considered these two taxa as being synonymous. However, mitochondrial data showed clear genetic differences between the two taxa. In addition, microsatellite-based studies and cytogenetic studies have also provided evidence that supports their differentiation. Considerable differences have also been observed at the phenotypic level in terms of growth rate and ecophysiological parameters. In the present study, C. angulata from Sado estuary (Portugal) and C. gigas from Seudre estuary (France) were collected and...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Hybridization; Shell pigmentation; Shell morphology.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3904.pdf

Hybridization and morphological differences between the two closely related oyster taxa Crassostrea angulata and C. gigas
Provedor de dados: 5
Autores: Batista, Frederico; Fonseca, Vera; Ben-hamadou, Radhouan; Taris, Nicolas; Henriques, Maria; Boudry, Pierre.
Unlike in some crops, no large heterotic effects have been observed in most farmed animals. Interestingly, significant hybrid vigour for some traits has been reported in the Pacific oyster, Crassostrea gigas. Crossbreeding between closely related taxa can be seen as an efficient way to exploit the dominance component of the genetic variance of a trait. Factorial crosses between the Portuguese oyster C. angulata (from Sado estuary, Portugal) and C. gigas (from Seudre estuary, France) were done to evaluate the aquaculture potential of hybrids. Juveniles of the different progenies were reared in Ria Formosa (Portugal) under usual farming conditions. The genetic confirmation of all progenies was done using mitochondrial and nuclear markers in order to detect...
Tipo: Text
Palavras-chave: Hybridization; Crassostrea angulata; Crassostrea gigas; Genetic; Oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3429.pdf