To facilitate the identification of microsatellite genetic markers from a single swine chromosome, chromosome microisolation and microcloning have been used to generate a swine chromosome 6-specific DNA library. Ten copies of swine chromosome 6 were scraped from metaphase spreads, ligated to custom-prepared adaptors, and amplified by PCR. The purity of the amplified product was verified by fluorescent in situ hybridization. The utility of the chromosome painting probe for heterologous painting was demonstrated and confirmed that swine chromosome 6 is syntenic to human chromosomes p and 19q. A small insert genomic library of 1.39 × 106 clones was generated from the PCR-amplified chromosome 6 genomic DNA and screened for (GT)n microsatellite genetic markers. Nine (GT)n microsatellite markers were developed and genotyped on a Yorkshire × Meishan swine reference family. All nine markers genetically mapped to chromosome 6, confirming the purity of the microisolation method. The method used here should be adaptable to the microdissection of sub-chromosomal regions of not only the swine genome but also other livestock genomes.

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© 1997 S. Karger AG, Basel
1997
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