La génétique du bar (Dicentrarchus labrax L.)

Chatain, Béatrice; Chavanne, Hervé

doi:10.1684/agr.2009.0296

Cited by 13 publications

(13 citation statements)

References 33 publications

(47 reference statements)

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“…Wild sea bass used to produce the broodstock for this study was collected from five distinct origins in the Northeastern Atlantic or the Mediterranean Sea recognized as the main subpopulations of wild sea bass (Chatain & Chavanne, 2009;Quéré et al, 2012) (Table 1).…”

Section: Broodstock Originmentioning

confidence: 99%

“…In European waters, the phylogeography of sea bass (Dicentrarchus labrax; Moronidae) has been the subject of numerous studies for approximately 30 years (Chatain & Chavanne, 2009;Quéré et al, 2012 for reviews). As for many other species (Patarnello et al, 2007), populations of sea bass have been shown to be genetically differentiated between the Atlantic and the Mediterranean Sea, and within the Mediterranean Sea itself (Quéré et al, 2012;Souche et al, 2015;Tine et al, 2014) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Guinand

Vandeputte

Dupont‐Nivet³

et al. 2017

Ecology and Evolution

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Describing and explaining the geographic within‐species variation in phenotypes (“phenogeography”) in the sea over a species distribution range is central to our understanding of a variety of eco‐evolutionary topics. However, phenogeographic studies that have a large potential to investigate adaptive variation are overcome by phylogeographic studies, still mainly focusing on neutral markers. How genotypic and phenotypic data could covary over large geographic scales remains poorly understood in marine species. We crossed 75 noninbred sires (five origins) and 26 dams (two origins; each side of a hybrid zone) in a factorial diallel cross in order to investigate geographic variation for early survival and sex ratio in the metapopulation of the European sea bass (Dicentrarchus labrax), a highly prized marine fish species. Full‐sib families (N = 1,950) were produced and reared in a common environment. Parentage assignment of 7,200 individuals was performed with seven microsatellite markers. Generalized linear models showed significant additive effects for both traits and pleiotropy between traits. A significant nonadditive genetic effect was detected. Different expression of traits and distinct relative performances were found for reciprocal crosses involving populations located on each side of the main hybrid zone located at the Almeria‐Oran front, illustrating asymmetric reproductive isolation. The poor fitness performance observed for the Western Mediterranean population of sea bass is discussed as it represents the main source of seed hatchery production, but also because it potentially illustrates nonadaptive introgression and maladaptation.

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Section: Broodstock Originmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Guinand

Vandeputte

Dupont‐Nivet³

et al. 2017

Ecology and Evolution

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“…European sea bass (Dicentrarchus labrax) one of the most important species reared in the Mediterranean since the 1980's (Chatain and Chavanne, 2009). In the wild, sea bass is widely distributed in the Mediterranean, the Black Sea and the Eastern coast of the Atlantic Ocean (from Norway to Morocco).…”

Section: Introductionmentioning

confidence: 99%

Investigation of morphological predictors of fillet and carcass yield in European sea bass ( Dicentrarchus labrax ) for application in selective breeding

et al. 2017

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Genetic parameters for carcass and fillet percentage were estimated in 760 European sea bass reared under commercial conditions and slaughtered at 573 days post fertilization (395 g mean body weight). Phenotyped fish were the offspring of 45 sires and 20 dams crossed in a factorial mating design. Pedigrees were reconstructed with 90.7% success using 12 microsatellites. The heritability of fillet yield was moderately low (0.21), while it was high for carcass yield (0.57). Both traits were poorly correlated (− 0.01 to 0.28) making space for their combined improvement. We investigated different predictors derived from measurement of surfaces on digital pictures and ultrasound measurements at several points of the body. The accuracy of the phenotypic prediction was rather low for fillet yield (r2 = 0.02-0.18), but higher for carcass yield (r2 = 0.27-0.41). However, genetic correlations of predictors with the traits to predict were reasonably high (up to 0.67 for fillet yield and 0.95 for carcass yield), thus allowing to consider them for performing indirect individual selection instead of sib selection. However, it was difficult to design a predictor that would simultaneously increase fillet yield and carcass yield because of contradicting effects of relative head size, an important component of the predictors which was positively correlated to carcass yield but not to fillet yield. Highlights ► We investigated morphological predictors and heritability of fillet and carcass yields in European sea bass. ► Fillet and carcass yield were heritable, but uncorrelated. ► It was not possible to find unequivocal morphological predictors applicable to both fillet and carcass.

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“…The European sea bass Dicentrarchus labrax L. is a model for evolutionary studies among marine fishes, in both wild and cultured populations (Volckaert et al 2008;Chatain and Chavanne 2009). Over its distribution area, the species is structured into three main metapopulations (Atlantic, Western, and Eastern Mediterranean [EM]), separated by well-defined barriers to gene flow (Benharrat et al 1983;Naciri et al 1999;Bahri-Sfar et al 2000;Lemaire et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Gene flow at major transitional areas in sea bass (Dicentrarchus labrax) and the possible emergence of a hybrid swarm

Quéré

Desmarais

Tsigenopoulos

et al. 2012

Ecology and Evolution

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The population genetic structure of sea bass (Dicentrarchus labrax) along a transect from the Atlantic Ocean (AO) to the Eastern Mediterranean (EM) Sea differs from that of most other marine taxa in this area. Three populations (AO, Western Mediterranean [WM], EM) are recognized today, which were originally two allopatric populations. How two ancestral genetic units have evolved into three distinct units has not been addressed yet. Therefore, to investigate mechanisms that lead to the emergence of the central WM population, its current status, and its connectivity with the two parental populations, we applied 20 nuclear loci that were either gene associated or gene independent. Results confirmed the existence of three distinct gene pools, with higher differentiation at two transitional areas, the Almeria-Oran Front (AOF) and of the Siculo-Tunisian Strait (STS), than within any population. Significant linkage disequilibrium and heterozygote excess indicated that the STS is probably another tension zone, as already described for the AOF. Neutrality tests fail to reveal marker loci that could be driven by selection within or among metapopulations, except for locus DLA0068. Collectively, results support that the central WM population arose by trapping two tensions zones at distinct geographic locations of limited connectivity. Population assignment further revealed that WM individuals were more introgressed than individuals from the other two metapopulations. This suggests that this population might result from hybrid swarming, and was or is still seeded by genes received through the filter of each tension zone.

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La génétique du bar (Dicentrarchus labrax L.)

Cited by 13 publications

References 33 publications

Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Investigation of morphological predictors of fillet and carcass yield in European sea bass ( Dicentrarchus labrax ) for application in selective breeding

Gene flow at major transitional areas in sea bass (Dicentrarchus labrax) and the possible emergence of a hybrid swarm

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