title: A first generation integrated map of the rainbow trout genome.
abstract: BACKGROUND
  Rainbow trout (Oncorhynchus mykiss) are the most-widely cultivated cold freshwater fish in the world and an important model species for many research areas. Coupling great interest in this species as a research model with the need for genetic improvement of aquaculture production efficiency traits justifies the continued development of genomics research resources. Many quantitative trait loci (QTL) have been identified for production and life-history traits in rainbow trout. An integrated physical and genetic map is needed to facilitate fine mapping of QTL and the selection of positional candidate genes for incorporation in marker-assisted selection (MAS) programs for improving rainbow trout aquaculture production.
  
  
  RESULTS
  The first generation integrated map of the rainbow trout genome is composed of 238 BAC contigs anchored to chromosomes of the genetic map. It covers more than 10% of the genome across segments from all 29 chromosomes. Anchoring of 203 contigs to chromosomes of the National Center for Cool and Cold Water Aquaculture (NCCCWA) genetic map was achieved through mapping of 288 genetic markers derived from BAC end sequences (BES), screening of the BAC library with previously mapped markers and matching of SNPs with BES reads. In addition, 35 contigs were anchored to linkage groups of the INRA (French National Institute of Agricultural Research) genetic map through markers that were not informative for linkage analysis in the NCCCWA mapping panel. The ratio of physical to genetic linkage distances varied substantially among chromosomes and BAC contigs with an average of 3,033 Kb/cM.
  
  
  CONCLUSIONS
  The integrated map described here provides a framework for a robust composite genome map for rainbow trout. This resource is needed for genomic analyses in this research model and economically important species and will facilitate comparative genome mapping with other salmonids and with model fish species. This resource will also facilitate efforts to assemble a whole-genome reference sequence for rainbow trout.
authors.affiliation: National Center for Cool and Cold Water Aquaculture, ARS-USDA, Kearneysville, WV 25430, USA. yniv.palti@ars.usda.gov
authors.forename: Yniv
authors.initials: Y
authors.lastname: Palti
authors.forename: Carine
authors.initials: C
authors.lastname: Genet
authors.forename: Ming-Cheng
authors.initials: MC
authors.lastname: Luo
authors.forename: Aurélie
authors.initials: A
authors.lastname: Charlet
authors.forename: Guangtu
authors.initials: G
authors.lastname: Gao
authors.forename: Yuqin
authors.initials: Y
authors.lastname: Hu
authors.forename: Cecilia
authors.initials: C
authors.lastname: Castaño-Sánchez
authors.forename: Kamila
authors.initials: K
authors.lastname: Tabet-Canale
authors.forename: Francine
authors.initials: F
authors.lastname: Krieg
authors.forename: Jianbo
authors.initials: J
authors.lastname: Yao
authors.forename: Roger L
authors.initials: RL
authors.lastname: Vallejo
authors.forename: Caird E
authors.initials: CE
authors.lastname: Rexroad
mesh_terms: D000818:Animals; D022202:Chromosomes, Artificial, Bacterial / Q000235:genetics; D020451:Contig Mapping; D008040:Genetic Linkage; D005819:Genetic Markers; D016678:Genome; D005838:Genotype; D018895:Microsatellite Repeats; D017686:Oncorhynchus mykiss / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D040641:Quantitative Trait Loci
chemical_list: D005819:Genetic Markers