A gene-based radiation hybrid map of the gilthead sea bream Sparus aurata refines and exploits conserved synteny with Tetraodon nigroviridis

Abstract

Background: Comparative teleost studies are of great interest since they are important in aquaculture and in evolutionary issues. Comparing genomes of fully sequenced model fish species with those of farmed fish species through comparative mapping offers shortcuts for quantitative trait loci (QTL) detections and for studying genome evolution through the identification of regions of conserved synteny in teleosts. Here a comparative mapping study is presented by radiation hybrid (RH) mapping genes of the gilthead sea bream Sparus aurata, a non-model teleost fish of commercial and evolutionary interest, as it represents the worldwide distributed species-rich family of Sparidae.

A microsatellite-based linkage map of salt tolerant tilapia (Oreochromis mossambicus x Oreochromis spp.) and mapping of sex-determining loci

“…All linkage groups in tilapia mainly corresponded to one or two linkage groups, or chromosomes in the four model fishes (Table 3), implying the high evolutionary conservation of chromosomes in these five fish species. Some conserved syntenies of fish chromosomes also were reported in medaka [37], pufferfish [38], seabream [39], catfish [7], grass carp [9] and striped bass [36]. …”

Comparative mapping for bighead carp (Aristichthys nobilis) against model and non-model fishes provides insights into the genomic evolution of cyprinids

“…(http://www.ensembl.org/index.html). Welldefined or high-density genetic linkage maps have been constructed for several food fishes, e.g., rainbow trout Oncorhynchus mykiss (Guyomard et al 2012;Rexroad et al 2008), Atlantic salmon Salmo salar (Lien et al 2011;Brenna-Hansen et al 2012), gilthead seabream Sparus aurata (Sarropoulou et al 2007), half-smooth tongue sole Cynoglossus semilaevis (Song et al 2012a) and Japanese flounder Paralichthys olivaceus (Song et al 2012b). Physical maps have also been reported in a few commercial fishes, such as channel catfish Ictalurus punctatus (Quiniou et al 2007), Nile tilapia Oreochromis niloticus (Katagiri et al 2005) and European seabass Dicentrarchus labrax (Kuhl et al 2010).…”

Quantitative trait loci for body growth and sex determination in the hermaphrodite teleost fish Sparus aurata L.

“…) and the radiation hybrid map (Sarropoulou et al . ), although in most of the groups, order and distance of markers are not totally preserved. Such differences are expected between studies owing to the use of different families (and therefore, populations).…”

“…; Sarropoulou et al . ); and QTL for growth, morphology (size), and disease resistance have also been mapped (Boulton et al . ; Loukovitis et al .…”