title: A BAC-based physical map of the channel catfish genome.
abstract: Catfish is the major aquaculture species in the United States. To enhance its genome studies involving genetic linkage and comparative mapping, a bacterial artificial chromosome (BAC) contig-based physical map of the channel catfish (Ictalurus punctatus) genome was generated using four-color fluorescence-based fingerprints. Fingerprints of 34,580 BAC clones (5.6x genome coverage) were generated for the FPC assembly of the BAC contigs. A total of 3307 contigs were assembled using a cutoff value of 1x10(-20). Each contig contains an average of 9.25 clones with an average size of 292 kb. The combined contig size for all contigs was 0.965 Gb, approximately the genome size of the channel catfish. The reliability of the contig assembly was assessed by both hybridization of gene probes to BAC clones contained in the fingerprinted assembly and validation of randomly selected contigs using overgo probes designed from BAC end sequences. The presented physical map should greatly enhance genome research in the catfish, particularly aiding in the identification of genomic regions containing genes underlying important performance traits.
authors.affiliation: The Fish Molecular Genetics and Biotechnology Laboratory, Department of Fisheries and Allied Aquacultures, and Program of Cell and Molecular Biosciences, Aquatic Genomics Unit, Auburn University, Auburn, AL 36849, USA.
authors.forename: Peng
authors.initials: P
authors.lastname: Xu
authors.forename: Shaolin
authors.initials: S
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Jim
authors.initials: J
authors.lastname: Thorsen
authors.forename: Huseyin
authors.initials: H
authors.lastname: Kucuktas
authors.forename: Zhanjiang
authors.initials: Z
authors.lastname: Liu
mesh_terms: D000818:Animals; D002397:Catfishes; D002874:Chromosome Mapping; D022202:Chromosomes, Artificial, Bacterial; D020451:Contig Mapping / Q000379:methods*; D015723:Gene Library; D016678:Genome; D015698:Genomic Library; D008957:Models, Genetic; D020161:Physical Chromosome Mapping / Q000379:methods*; D017422:Sequence Analysis, DNA