title: A radiation hybrid map of the European sea bass (Dicentrarchus labrax) based on 1581 markers: Synteny analysis with model fish genomes.
abstract: The selective breeding of fish for aquaculture purposes requires the understanding of the genetic basis of traits such as growth, behaviour, resistance to pathogens and sex determinism. Access to well-developed genomic resources is a prerequisite to improve the knowledge of these traits. Having this aim in mind, a radiation hybrid (RH) panel of European sea bass (Dicentrarchus labrax) was constructed from splenocytes irradiated at 3000 rad, allowing the construction of a 1581 marker RH map. A total of 1440 gene markers providing ~4400 anchors with the genomes of three-spined stickleback, medaka, pufferfish and zebrafish, helped establish synteny relationships with these model species. The identification of Conserved Segments Ordered (CSO) between sea bass and model species allows the anticipation of the position of any sea bass gene from its location in model genomes. Synteny relationships between sea bass and gilthead seabream were addressed by mapping 37 orthologous markers. The sea bass genetic linkage map was integrated in the RH map through the mapping of 141 microsatellites. We are thus able to present the first complete gene map of sea bass. It will facilitate linkage studies and the identification of candidate genes and Quantitative Trait Loci (QTL). The RH map further positions sea bass as a genetic and evolutionary model of Perciformes and supports their ongoing aquaculture expansion.
authors.affiliation: CNRS UMR 6061 Institut de Génétique et Développement, Université de Rennes 1, 2 Avenue du Pr Léon Bernard, F-35043 Rennes Cedex, France.
authors.forename: Richard
authors.initials: R
authors.lastname: Guyon
authors.forename: Fabrice
authors.initials: F
authors.lastname: Senger
authors.forename: Michaelle
authors.initials: M
authors.lastname: Rakotomanga
authors.forename: Naoual
authors.initials: N
authors.lastname: Sadequi
authors.forename: Filip A M
authors.initials: FA
authors.lastname: Volckaert
authors.forename: Christophe
authors.initials: C
authors.lastname: Hitte
authors.forename: Francis
authors.initials: F
authors.lastname: Galibert
mesh_terms: D000818:Animals; D001492:Bass / Q000235:genetics*; D002460:Cell Line; D002874:Chromosome Mapping / Q000379:methods; D005260:Female; D005819:Genetic Markers / Q000502:physiology; D016678:Genome / Q000235:genetics; D023281:Genomics / Q000379:methods; D008297:Male; D023421:Models, Animal; D011828:Radiation Chimera / Q000235:genetics*; D021101:Radiation Hybrid Mapping / Q000379:methods*; D026801:Synteny / Q000235:genetics*; D023721:Tetraodontiformes / Q000235:genetics
chemical_list: D005819:Genetic Markers