Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5908070 | Genomics | 2007 | 9 Pages |
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 (5.6Ã genome coverage) were generated for the FPC assembly of the BAC contigs. A total of 3307 contigs were assembled using a cutoff value of 1Â ÃÂ 10â20. Each contig contains an average of 9.25 clones with an average size of 292Â kb. The combined contig size for all contigs was 0.965Â 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.
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Authors
Peng Xu, Shaolin Wang, Lei Liu, Jim Thorsen, Huseyin Kucuktas, Zhanjiang Liu,