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Chicken microsatellite markers isolated from libraries enriched for simple tandem repeats
M Gibbs1, D A Dawson, C McCamley
1Department of Biology, University of Leicester, UK.
Animal Genetics
|May 20, 1998
Summary
Researchers developed an efficient method to clone chicken microsatellites, crucial for creating detailed genetic maps. This technique significantly increased the yield of useful microsatellite markers in chickens.
Area of Science:
- Genomics
- Molecular Biology
- Avian Genetics
Background:
- Microsatellite loci are significantly less abundant in avian genomes compared to mammalian genomes.
- Developing high-resolution genetic maps in chickens requires efficient methods for microsatellite identification and cloning.
Purpose of the Study:
- To establish an efficient strategy for large-scale cloning of chicken microsatellites.
- To improve the yield of microsatellite markers for constructing a high-resolution chicken genetic map.
Main Methods:
- Construction of a plasmid library from chicken genomic DNA using an enrichment strategy via hybridization selection.
- Enrichment targeted tandem repeat sequences to increase the proportion of relevant clones.
- Primer design from 121 unique sequences and Polymerase Chain Reaction (PCR) analysis.
Main Results:
- The enrichment strategy increased the proportion of recombinant clones containing simple tandem repeats to 16%, a substantial improvement over the <0.1% in non-enriched libraries.
- 72 microsatellite loci were successfully localized on the collaborative chicken genetic map.
- At least 30 additional loci proved informative in genetic crosses.
Conclusions:
- Enrichment via hybridization selection is a highly effective method for isolating chicken microsatellites.
- This approach significantly enhances the efficiency of microsatellite discovery for avian genetic mapping.
- The identified microsatellite loci will advance the development of high-resolution genetic maps in chickens.